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* xen: fix logical error in tlb flushingAlex Shi2012-09-051-1/+1
| | | | | | | | | | | | | | | | While TLB_FLUSH_ALL gets passed as 'end' argument to flush_tlb_others(), the Xen code was made to check its 'start' parameter. That may give a incorrect op.cmd to MMUEXT_INVLPG_MULTI instead of MMUEXT_TLB_FLUSH_MULTI. Then it causes some page can not be flushed from TLB. This patch fixed this issue. Reported-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Alex Shi <alex.shi@intel.com> Acked-by: Jan Beulich <jbeulich@suse.com> Tested-by: Yongjie Ren <yongjie.ren@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds2012-07-261-6/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86/mm changes from Peter Anvin: "The big change here is the patchset by Alex Shi to use INVLPG to flush only the affected pages when we only need to flush a small page range. It also removes the special INVALIDATE_TLB_VECTOR interrupts (32 vectors!) and replace it with an ordinary IPI function call." Fix up trivial conflicts in arch/x86/include/asm/apic.h (added code next to changed line) * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/tlb: Fix build warning and crash when building for !SMP x86/tlb: do flush_tlb_kernel_range by 'invlpg' x86/tlb: replace INVALIDATE_TLB_VECTOR by CALL_FUNCTION_VECTOR x86/tlb: enable tlb flush range support for x86 mm/mmu_gather: enable tlb flush range in generic mmu_gather x86/tlb: add tlb_flushall_shift knob into debugfs x86/tlb: add tlb_flushall_shift for specific CPU x86/tlb: fall back to flush all when meet a THP large page x86/flush_tlb: try flush_tlb_single one by one in flush_tlb_range x86/tlb_info: get last level TLB entry number of CPU x86: Add read_mostly declaration/definition to variables from smp.h x86: Define early read-mostly per-cpu macros
| * x86/flush_tlb: try flush_tlb_single one by one in flush_tlb_rangeAlex Shi2012-06-271-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | x86 has no flush_tlb_range support in instruction level. Currently the flush_tlb_range just implemented by flushing all page table. That is not the best solution for all scenarios. In fact, if we just use 'invlpg' to flush few lines from TLB, we can get the performance gain from later remain TLB lines accessing. But the 'invlpg' instruction costs much of time. Its execution time can compete with cr3 rewriting, and even a bit more on SNB CPU. So, on a 512 4KB TLB entries CPU, the balance points is at: (512 - X) * 100ns(assumed TLB refill cost) = X(TLB flush entries) * 100ns(assumed invlpg cost) Here, X is 256, that is 1/2 of 512 entries. But with the mysterious CPU pre-fetcher and page miss handler Unit, the assumed TLB refill cost is far lower then 100ns in sequential access. And 2 HT siblings in one core makes the memory access more faster if they are accessing the same memory. So, in the patch, I just do the change when the target entries is less than 1/16 of whole active tlb entries. Actually, I have no data support for the percentage '1/16', so any suggestions are welcomed. As to hugetlb, guess due to smaller page table, and smaller active TLB entries, I didn't see benefit via my benchmark, so no optimizing now. My micro benchmark show in ideal scenarios, the performance improves 70 percent in reading. And in worst scenario, the reading/writing performance is similar with unpatched 3.4-rc4 kernel. Here is the reading data on my 2P * 4cores *HT NHM EP machine, with THP 'always': multi thread testing, '-t' paramter is thread number: with patch unpatched 3.4-rc4 ./mprotect -t 1 14ns 24ns ./mprotect -t 2 13ns 22ns ./mprotect -t 4 12ns 19ns ./mprotect -t 8 14ns 16ns ./mprotect -t 16 28ns 26ns ./mprotect -t 32 54ns 51ns ./mprotect -t 128 200ns 199ns Single process with sequencial flushing and memory accessing: with patch unpatched 3.4-rc4 ./mprotect 7ns 11ns ./mprotect -p 4096 -l 8 -n 10240 21ns 21ns [ hpa: http://lkml.kernel.org/r/1B4B44D9196EFF41AE41FDA404FC0A100BFF94@SHSMSX101.ccr.corp.intel.com has additional performance numbers. ] Signed-off-by: Alex Shi <alex.shi@intel.com> Link: http://lkml.kernel.org/r/1340845344-27557-3-git-send-email-alex.shi@intel.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | xen/mm: zero PTEs for non-present MFNs in the initial page tableDavid Vrabel2012-07-191-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | When constructing the initial page tables, if the MFN for a usable PFN is missing in the p2m then that frame is initially ballooned out. In this case, zero the PTE (as in decrease_reservation() in drivers/xen/balloon.c). This is obviously safe instead of having an valid PTE with an MFN of INVALID_P2M_ENTRY (~0). Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | xen/mm: do direct hypercall in xen_set_pte() if batching is unavailableDavid Vrabel2012-07-191-5/+25
|/ | | | | | | | | | | | | | | | | | | | | | | | | | In xen_set_pte() if batching is unavailable (because the caller is in an interrupt context such as handling a page fault) it would fall back to using native_set_pte() and trapping and emulating the PTE write. On 32-bit guests this requires two traps for each PTE write (one for each dword of the PTE). Instead, do one mmu_update hypercall directly. During construction of the initial page tables, continue to use native_set_pte() because most of the PTEs being set are in writable and unpinned pages (see phys_pmd_init() in arch/x86/mm/init_64.c) and using a hypercall for this is very expensive. This significantly improves page fault performance in 32-bit PV guests. lmbench3 test Before After Improvement ---------------------------------------------- lat_pagefault 3.18 us 2.32 us 27% lat_proc fork 356 us 313.3 us 11% Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* Merge tag 'stable/for-linus-3.5-rc0-tag' of ↵Linus Torvalds2012-05-241-23/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull Xen updates from Konrad Rzeszutek Wilk: "Features: * Extend the APIC ops implementation and add IRQ_WORKER vector support so that 'perf' can work properly. * Fix self-ballooning code, and balloon logic when booting as initial domain. * Move array printing code to generic debugfs * Support XenBus domains. * Lazily free grants when a domain is dead/non-existent. * In M2P code use batching calls Bug-fixes: * Fix NULL dereference in allocation failure path (hvc_xen) * Fix unbinding of IRQ_WORKER vector during vCPU hot-unplug * Fix HVM guest resume - we would leak an PIRQ value instead of reusing the existing one." Fix up add-add onflicts in arch/x86/xen/enlighten.c due to addition of apic ipi interface next to the new apic_id functions. * tag 'stable/for-linus-3.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: do not map the same GSI twice in PVHVM guests. hvc_xen: NULL dereference on allocation failure xen: Add selfballoning memory reservation tunable. xenbus: Add support for xenbus backend in stub domain xen/smp: unbind irqworkX when unplugging vCPUs. xen: enter/exit lazy_mmu_mode around m2p_override calls xen/acpi/sleep: Enable ACPI sleep via the __acpi_os_prepare_sleep xen: implement IRQ_WORK_VECTOR handler xen: implement apic ipi interface xen/setup: update VA mapping when releasing memory during setup xen/setup: Combine the two hypercall functions - since they are quite similar. xen/setup: Populate freed MFNs from non-RAM E820 entries and gaps to E820 RAM xen/setup: Only print "Freeing XXX-YYY pfn range: Z pages freed" if Z > 0 xen/gnttab: add deferred freeing logic debugfs: Add support to print u32 array in debugfs xen/p2m: An early bootup variant of set_phys_to_machine xen/p2m: Collapse early_alloc_p2m_middle redundant checks. xen/p2m: Allow alloc_p2m_middle to call reserve_brk depending on argument xen/p2m: Move code around to allow for better re-usage.
| * Merge branch 'stable/autoballoon.v5.2' into stable/for-linus-3.5Konrad Rzeszutek Wilk2012-05-071-23/+0
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * stable/autoballoon.v5.2: xen/setup: update VA mapping when releasing memory during setup xen/setup: Combine the two hypercall functions - since they are quite similar. xen/setup: Populate freed MFNs from non-RAM E820 entries and gaps to E820 RAM xen/setup: Only print "Freeing XXX-YYY pfn range: Z pages freed" if Z > 0 xen/p2m: An early bootup variant of set_phys_to_machine xen/p2m: Collapse early_alloc_p2m_middle redundant checks. xen/p2m: Allow alloc_p2m_middle to call reserve_brk depending on argument xen/p2m: Move code around to allow for better re-usage.
| | * xen/setup: update VA mapping when releasing memory during setupDavid Vrabel2012-05-071-23/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In xen_memory_setup(), if a page that is being released has a VA mapping this must also be updated. Otherwise, the page will be not released completely -- it will still be referenced in Xen and won't be freed util the mapping is removed and this prevents it from being reallocated at a different PFN. This was already being done for the ISA memory region in xen_ident_map_ISA() but on many systems this was omitting a few pages as many systems marked a few pages below the ISA memory region as reserved in the e820 map. This fixes errors such as: (XEN) page_alloc.c:1148:d0 Over-allocation for domain 0: 2097153 > 2097152 (XEN) memory.c:133:d0 Could not allocate order=0 extent: id=0 memflags=0 (0 of 17) Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | | Merge branch 'x86-apic-for-linus' of ↵Linus Torvalds2012-05-221-3/+1
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86/apic changes from Ingo Molnar: "Most of the changes are about helping virtualized guest kernels achieve better performance." Fix up trivial conflicts with the iommu updates to arch/x86/kernel/apic/io_apic.c * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic: Implement EIO micro-optimization x86/apic: Add apic->eoi_write() callback x86/apic: Use symbolic APIC_EOI_ACK x86/apic: Fix typo EIO_ACK -> EOI_ACK and document it x86/xen/apic: Add missing #include <xen/xen.h> x86/apic: Only compile local function if used with !CONFIG_GENERIC_PENDING_IRQ x86/apic: Fix UP boot crash x86: Conditionally update time when ack-ing pending irqs xen/apic: implement io apic read with hypercall Revert "xen/x86: Workaround 'x86/ioapic: Add register level checks to detect bogus io-apic entries'" xen/x86: Implement x86_apic_ops x86/apic: Replace io_apic_ops with x86_io_apic_ops.
| * | | Revert "xen/x86: Workaround 'x86/ioapic: Add register level checks to detect ↵Konrad Rzeszutek Wilk2012-05-011-3/+1
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | bogus io-apic entries'" This reverts commit 2531d64b6fe2724dc432b67d8dc66bd45621da0b. The two patches: x86/apic: Replace io_apic_ops with x86_io_apic_ops. xen/x86: Implement x86_apic_ops take care of fixing it properly. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* / / xen/pte: Fix crashes when trying to see non-existent PGD/PMD/PUD/PTEsKonrad Rzeszutek Wilk2012-05-071-1/+6
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If I try to do "cat /sys/kernel/debug/kernel_page_tables" I end up with: BUG: unable to handle kernel paging request at ffffc7fffffff000 IP: [<ffffffff8106aa51>] ptdump_show+0x221/0x480 PGD 0 Oops: 0000 [#1] SMP CPU 0 .. snip.. RAX: 0000000000000000 RBX: ffffc00000000fff RCX: 0000000000000000 RDX: 0000800000000000 RSI: 0000000000000000 RDI: ffffc7fffffff000 which is due to the fact we are trying to access a PFN that is not accessible to us. The reason (at least in this case) was that PGD[256] is set to __HYPERVISOR_VIRT_START which was setup (by the hypervisor) to point to a read-only linear map of the MFN->PFN array. During our parsing we would get the MFN (a valid one), try to look it up in the MFN->PFN tree and find it invalid and return ~0 as PFN. Then pte_mfn_to_pfn would happilly feed that in, attach the flags and return it back to the caller. 'ptdump_show' bitshifts it and gets and invalid value that it tries to dereference. Instead of doing all of that, we detect the ~0 case and just return !_PAGE_PRESENT. This bug has been in existence .. at least until 2.6.37 (yikes!) CC: stable@kernel.org Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | Merge tag 'stable/for-linus-3.4-rc1-tag' of ↵Linus Torvalds2012-04-061-1/+3
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull xen fixes from Konrad Rzeszutek Wilk: "Two fixes for regressions: * one is a workaround that will be removed in v3.5 with proper fix in the tip/x86 tree, * the other is to fix drivers to load on PV (a previous patch made them only load in PVonHVM mode). The rest are just minor fixes in the various drivers and some cleanup in the core code." * tag 'stable/for-linus-3.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/pcifront: avoid pci_frontend_enable_msix() falsely returning success xen/pciback: fix XEN_PCI_OP_enable_msix result xen/smp: Remove unnecessary call to smp_processor_id() xen/x86: Workaround 'x86/ioapic: Add register level checks to detect bogus io-apic entries' xen: only check xen_platform_pci_unplug if hvm
| * xen/x86: Workaround 'x86/ioapic: Add register level checks to detect bogus ↵Konrad Rzeszutek Wilk2012-04-061-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | io-apic entries' The above mentioned patch checks the IOAPIC and if it contains -1, then it unmaps said IOAPIC. But under Xen we get this: BUG: unable to handle kernel NULL pointer dereference at 0000000000000040 IP: [<ffffffff8134e51f>] xen_irq_init+0x1f/0xb0 PGD 0 Oops: 0002 [#1] SMP CPU 0 Modules linked in: Pid: 1, comm: swapper/0 Not tainted 3.2.10-3.fc16.x86_64 #1 Dell Inc. Inspiron 1525 /0U990C RIP: e030:[<ffffffff8134e51f>] [<ffffffff8134e51f>] xen_irq_init+0x1f/0xb0 RSP: e02b: ffff8800d42cbb70 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00000000ffffffef RCX: 0000000000000001 RDX: 0000000000000040 RSI: 00000000ffffffef RDI: 0000000000000001 RBP: ffff8800d42cbb80 R08: ffff8800d6400000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffef R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000010 FS: 0000000000000000(0000) GS:ffff8800df5fe000(0000) knlGS:0000000000000000 CS: e033 DS: 0000 ES: 0000 CR0:000000008005003b CR2: 0000000000000040 CR3: 0000000001a05000 CR4: 0000000000002660 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper/0 (pid: 1, threadinfo ffff8800d42ca000, task ffff8800d42d0000) Stack: 00000000ffffffef 0000000000000010 ffff8800d42cbbe0 ffffffff8134f157 ffffffff8100a9b2 ffffffff8182ffd1 00000000000000a0 00000000829e7384 0000000000000002 0000000000000010 00000000ffffffff 0000000000000000 Call Trace: [<ffffffff8134f157>] xen_bind_pirq_gsi_to_irq+0x87/0x230 [<ffffffff8100a9b2>] ? check_events+0x12+0x20 [<ffffffff814bab42>] xen_register_pirq+0x82/0xe0 [<ffffffff814bac1a>] xen_register_gsi.part.2+0x4a/0xd0 [<ffffffff814bacc0>] acpi_register_gsi_xen+0x20/0x30 [<ffffffff8103036f>] acpi_register_gsi+0xf/0x20 [<ffffffff8131abdb>] acpi_pci_irq_enable+0x12e/0x202 [<ffffffff814bc849>] pcibios_enable_device+0x39/0x40 [<ffffffff812dc7ab>] do_pci_enable_device+0x4b/0x70 [<ffffffff812dc878>] __pci_enable_device_flags+0xa8/0xf0 [<ffffffff812dc8d3>] pci_enable_device+0x13/0x20 The reason we are dying is b/c the call acpi_get_override_irq() is used, which returns the polarity and trigger for the IRQs. That function calls mp_find_ioapics to get the 'struct ioapic' structure - which along with the mp_irq[x] is used to figure out the default values and the polarity/trigger overrides. Since the mp_find_ioapics now returns -1 [b/c the IOAPIC is filled with 0xffffffff], the acpi_get_override_irq() stops trying to lookup in the mp_irq[x] the proper INT_SRV_OVR and we can't install the SCI interrupt. The proper fix for this is going in v3.5 and adds an x86_io_apic_ops struct so that platforms can override it. But for v3.4 lets carry this work-around. This patch does that by providing a slightly different variant of the fake IOAPIC entries. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | Merge tag 'stable/for-linus-3.4-tag' of ↵Linus Torvalds2012-03-221-10/+10
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull xen updates from Konrad Rzeszutek Wilk: "which has three neat features: - PV multiconsole support, so that there can be hvc1, hvc2, etc; This can be used in HVM and in PV mode. - P-state and C-state power management driver that uploads said power management data to the hypervisor. It also inhibits cpufreq scaling drivers to load so that only the hypervisor can make power management decisions - fixing a weird perf bug. There is one thing in the Kconfig that you won't like: "default y if (X86_ACPI_CPUFREQ = y || X86_POWERNOW_K8 = y)" (note, that it all depends on CONFIG_XEN which depends on CONFIG_PARAVIRT which by default is off). I've a fix to convert that boolean expression into "default m" which I am going to post after the cpufreq git pull - as the two patches to make this work depend on a fix in Dave Jones's tree. - Function Level Reset (FLR) support in the Xen PCI backend. Fixes: - Kconfig dependencies for Xen PV keyboard and video - Compile warnings and constify fixes - Change over to use percpu_xxx instead of this_cpu_xxx" Fix up trivial conflicts in drivers/tty/hvc/hvc_xen.c due to changes to a removed commit. * tag 'stable/for-linus-3.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen kconfig: relax INPUT_XEN_KBDDEV_FRONTEND deps xen/acpi-processor: C and P-state driver that uploads said data to hypervisor. xen: constify all instances of "struct attribute_group" xen/xenbus: ignore console/0 hvc_xen: introduce HVC_XEN_FRONTEND hvc_xen: implement multiconsole support hvc_xen: support PV on HVM consoles xenbus: don't free other end details too early xen/enlighten: Expose MWAIT and MWAIT_LEAF if hypervisor OKs it. xen/setup/pm/acpi: Remove the call to boot_option_idle_override. xenbus: address compiler warnings xen: use this_cpu_xxx replace percpu_xxx funcs xen/pciback: Support pci_reset_function, aka FLR or D3 support. pci: Introduce __pci_reset_function_locked to be used when holding device_lock. xen: Utilize the restore_msi_irqs hook.
| * xen: use this_cpu_xxx replace percpu_xxx funcsAlex Shi2012-01-241-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | percpu_xxx funcs are duplicated with this_cpu_xxx funcs, so replace them for further code clean up. I don't know much of xen code. But, since the code is in x86 architecture, the percpu_xxx is exactly same as this_cpu_xxx serials functions. So, the change is safe. Signed-off-by: Alex Shi <alex.shi@intel.com> Acked-by: Christoph Lameter <cl@gentwo.org> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | xen/pat: Disable PAT support for now.Konrad Rzeszutek Wilk2012-02-201-4/+4
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [Pls also look at https://lkml.org/lkml/2012/2/10/228] Using of PAT to change pages from WB to WC works quite nicely. Changing it back to WB - not so much. The crux of the matter is that the code that does this (__page_change_att_set_clr) has only limited information so when it tries to the change it gets the "raw" unfiltered information instead of the properly filtered one - and the "raw" one tell it that PSE bit is on (while infact it is not). As a result when the PTE is set to be WB from WC, we get tons of: :WARNING: at arch/x86/xen/mmu.c:475 xen_make_pte+0x67/0xa0() :Hardware name: HP xw4400 Workstation .. snip.. :Pid: 27, comm: kswapd0 Tainted: G W 3.2.2-1.fc16.x86_64 #1 :Call Trace: : [<ffffffff8106dd1f>] warn_slowpath_common+0x7f/0xc0 : [<ffffffff8106dd7a>] warn_slowpath_null+0x1a/0x20 : [<ffffffff81005a17>] xen_make_pte+0x67/0xa0 : [<ffffffff810051bd>] __raw_callee_save_xen_make_pte+0x11/0x1e : [<ffffffff81040e15>] ? __change_page_attr_set_clr+0x9d5/0xc00 : [<ffffffff8114c2e8>] ? __purge_vmap_area_lazy+0x158/0x1d0 : [<ffffffff8114cca5>] ? vm_unmap_aliases+0x175/0x190 : [<ffffffff81041168>] change_page_attr_set_clr+0x128/0x4c0 : [<ffffffff81041542>] set_pages_array_wb+0x42/0xa0 : [<ffffffff8100a9b2>] ? check_events+0x12/0x20 : [<ffffffffa0074d4c>] ttm_pages_put+0x1c/0x70 [ttm] : [<ffffffffa0074e98>] ttm_page_pool_free+0xf8/0x180 [ttm] : [<ffffffffa0074f78>] ttm_pool_mm_shrink+0x58/0x90 [ttm] : [<ffffffff8112ba04>] shrink_slab+0x154/0x310 : [<ffffffff8112f17a>] balance_pgdat+0x4fa/0x6c0 : [<ffffffff8112f4b8>] kswapd+0x178/0x3d0 : [<ffffffff815df134>] ? __schedule+0x3d4/0x8c0 : [<ffffffff81090410>] ? remove_wait_queue+0x50/0x50 : [<ffffffff8112f340>] ? balance_pgdat+0x6c0/0x6c0 : [<ffffffff8108fb6c>] kthread+0x8c/0xa0 for every page. The proper fix for this is has been posted and is https://lkml.org/lkml/2012/2/10/228 "x86/cpa: Use pte_attrs instead of pte_flags on CPA/set_p.._wb/wc operations." along with a detailed description of the problem and solution. But since that posting has gone nowhere I am proposing this band-aid solution so that at least users don't get the page corruption (the pages that are WC don't get changed to WB and end up being recycled for filesystem or other things causing mysterious crashes). The negative impact of this patch is that users of WC flag (which are InfiniBand, radeon, nouveau drivers) won't be able to set that flag - so they are going to see performance degradation. But stability is more important here. Fixes RH BZ# 742032, 787403, and 745574 Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen/mmu: Fix compile errors introduced by x86/memblock mismerge.Konrad Rzeszutek Wilk2012-01-091-1/+1
| | | | | | | | | | | | | The git commit d4bbf7e7759afc172e2bfbc5c416324590049cdd "Merge branch 'master' into x86/memblock" mismerged the 32-bit section causing: arch/x86/xen/mmu.c: In function ‘xen_setup_kernel_pagetable’: arch/x86/xen/mmu.c:1855: error: expected ‘;’ before ‘)’ token arch/x86/xen/mmu.c:1855: error: expected statement before ‘)’ token Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* Merge branch 'master' into x86/memblockTejun Heo2011-11-281-83/+122
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts & resolutions: * arch/x86/xen/setup.c dc91c728fd "xen: allow extra memory to be in multiple regions" 24aa07882b "memblock, x86: Replace memblock_x86_reserve/free..." conflicted on xen_add_extra_mem() updates. The resolution is trivial as the latter just want to replace memblock_x86_reserve_range() with memblock_reserve(). * drivers/pci/intel-iommu.c 166e9278a3f "x86/ia64: intel-iommu: move to drivers/iommu/" 5dfe8660a3d "bootmem: Replace work_with_active_regions() with..." conflicted as the former moved the file under drivers/iommu/. Resolved by applying the chnages from the latter on the moved file. * mm/Kconfig 6661672053a "memblock: add NO_BOOTMEM config symbol" c378ddd53f9 "memblock, x86: Make ARCH_DISCARD_MEMBLOCK a config option" conflicted trivially. Both added config options. Just letting both add their own options resolves the conflict. * mm/memblock.c d1f0ece6cdc "mm/memblock.c: small function definition fixes" ed7b56a799c "memblock: Remove memblock_memory_can_coalesce()" confliected. The former updates function removed by the latter. Resolution is trivial. Signed-off-by: Tejun Heo <tj@kernel.org>
| * Merge branches 'stable/bug.fixes-3.2' and 'stable/mmu.fixes' of ↵Linus Torvalds2011-10-251-52/+0
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/bug.fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/p2m/debugfs: Make type_name more obvious. xen/p2m/debugfs: Fix potential pointer exception. xen/enlighten: Fix compile warnings and set cx to known value. xen/xenbus: Remove the unnecessary check. xen/irq: If we fail during msi_capability_init return proper error code. xen/events: Don't check the info for NULL as it is already done. xen/events: BUG() when we can't allocate our event->irq array. * 'stable/mmu.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: Fix selfballooning and ensure it doesn't go too far xen/gntdev: Fix sleep-inside-spinlock xen: modify kernel mappings corresponding to granted pages xen: add an "highmem" parameter to alloc_xenballooned_pages xen/p2m: Use SetPagePrivate and its friends for M2P overrides. xen/p2m: Make debug/xen/mmu/p2m visible again. Revert "xen/debug: WARN_ON when identity PFN has no _PAGE_IOMAP flag set."
| | * xen/p2m: Make debug/xen/mmu/p2m visible again.Konrad Rzeszutek Wilk2011-09-231-14/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We dropped a lot of the MMU debugfs in favour of using tracing API - but there is one which just provides mostly static information that was made invisible by this change. Bring it back. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| | * Revert "xen/debug: WARN_ON when identity PFN has no _PAGE_IOMAP flag set."Konrad Rzeszutek Wilk2011-08-091-38/+0
| | | | | | | | | | | | | | | | | | | | | | | | We don' use it anymore and there are more false positives. This reverts commit fc25151d9ac7d809239fe68de0a1490b504bb94a. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | Merge branch 'stable/bug.fixes' of git://oss.oracle.com/git/kwilk/xenLinus Torvalds2011-09-161-4/+2
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'stable/bug.fixes' of git://oss.oracle.com/git/kwilk/xen: xen/i386: follow-up to "replace order-based range checking of M2P table by linear one" xen/irq: Alter the locking to use a mutex instead of a spinlock. xen/e820: if there is no dom0_mem=, don't tweak extra_pages. xen: disable PV spinlocks on HVM
| | * | xen/i386: follow-up to "replace order-based range checking of M2P table by ↵Jan Beulich2011-09-151-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | linear one" The numbers obtained from the hypervisor really can't ever lead to an overflow here, only the original calculation going through the order of the range could have. This avoids the (as Jeremy points outs) somewhat ugly NULL-based calculation here. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | Merge branch 'stable/bug.fixes' of ↵Linus Torvalds2011-08-221-4/+8
| |\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/tracing: Fix tracing config option properly xen: Do not enable PV IPIs when vector callback not present xen/x86: replace order-based range checking of M2P table by linear one xen: xen-selfballoon.c needs more header files
| | * | xen/x86: replace order-based range checking of M2P table by linear oneJan Beulich2011-08-171-4/+8
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The order-based approach is not only less efficient (requiring a shift and a compare, typical generated code looking like this mov eax, [machine_to_phys_order] mov ecx, eax shr ebx, cl test ebx, ebx jnz ... whereas a direct check requires just a compare, like in cmp ebx, [machine_to_phys_nr] jae ... ), but also slightly dangerous in the 32-on-64 case - the element address calculation can wrap if the next power of two boundary is sufficiently far away from the actual upper limit of the table, and hence can result in user space addresses being accessed (with it being unknown what may actually be mapped there). Additionally, the elimination of the mistaken use of fls() here (should have been __fls()) fixes a latent issue on x86-64 that would trigger if the code was run on a system with memory extending beyond the 44-bit boundary. CC: stable@kernel.org Signed-off-by: Jan Beulich <jbeulich@novell.com> [v1: Based on Jeremy's feedback] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | Merge branch 'x86-vdso-for-linus' of ↵Linus Torvalds2011-08-121-1/+3
| |\ \ | | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-tip * 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-tip: x86-64: Rework vsyscall emulation and add vsyscall= parameter x86-64: Wire up getcpu syscall x86: Remove unnecessary compile flag tweaks for vsyscall code x86-64: Add vsyscall:emulate_vsyscall trace event x86-64: Add user_64bit_mode paravirt op x86-64, xen: Enable the vvar mapping x86-64: Work around gold bug 13023 x86-64: Move the "user" vsyscall segment out of the data segment. x86-64: Pad vDSO to a page boundary
| | * x86-64, xen: Enable the vvar mappingAndy Lutomirski2011-08-041-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Xen needs to handle VVAR_PAGE, introduced in git commit: 9fd67b4ed0714ab718f1f9bd14c344af336a6df7 x86-64: Give vvars their own page Otherwise we die during bootup with a message like: (XEN) mm.c:940:d10 Error getting mfn 1888 (pfn 1e3e48) from L1 entry 8000000001888465 for l1e_owner=10, pg_owner=10 (XEN) mm.c:5049:d10 ptwr_emulate: could not get_page_from_l1e() [ 0.000000] BUG: unable to handle kernel NULL pointer dereference at (null) [ 0.000000] IP: [<ffffffff8103a930>] xen_set_pte+0x20/0xe0 Signed-off-by: Andy Lutomirski <luto@mit.edu> Link: http://lkml.kernel.org/r/4659478ed2f3480938f96491c2ecbe2b2e113a23.1312378163.git.luto@mit.edu Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | xen/mmu: tune pgtable alloc/releaseJeremy Fitzhardinge2011-07-181-9/+44
| | | | | | | | | | | | | | | | | | | | | | | | Make sure the fastpath code is inlined. Batch the page permission change and the pin/unpin, and make sure that it can be batched with any adjacent set_pte/pmd/etc operations. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * | xen/mmu: use extend_args for more mmuext updatesJeremy Fitzhardinge2011-07-181-15/+27
| | | | | | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * | xen/trace: add tlb flush tracepointsJeremy Fitzhardinge2011-07-181-0/+8
| | | | | | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * | xen/trace: add xen_pgd_(un)pin tracepointsJeremy Fitzhardinge2011-07-181-0/+4
| | | | | | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * | xen/trace: add ptpage alloc/release tracepointsJeremy Fitzhardinge2011-07-181-2/+8
| | | | | | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * | xen/trace: add mmu tracepointsJeremy Fitzhardinge2011-07-181-2/+24
| |/ | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* / memblock, x86: Replace memblock_x86_reserve/free_range() with generic onesTejun Heo2011-07-141-8/+4
|/ | | | | | | | | | | | | | | | | | | | Other than sanity check and debug message, the x86 specific version of memblock reserve/free functions are simple wrappers around the generic versions - memblock_reserve/free(). This patch adds debug messages with caller identification to the generic versions and replaces x86 specific ones and kills them. arch/x86/include/asm/memblock.h and arch/x86/mm/memblock.c are empty after this change and removed. Signed-off-by: Tejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/r/1310462166-31469-14-git-send-email-tj@kernel.org Cc: Yinghai Lu <yinghai@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* xen/mmu: Fix for linker errors when CONFIG_SMP is not defined.Konrad Rzeszutek Wilk2011-06-301-0/+4
| | | | | | | | | Simple enough - we use an extern defined symbol which is not defined when CONFIG_SMP is not defined. This fixes the linker dying. CC: stable@kernel.org Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen: support CONFIG_MAXSMPAndrew Jones2011-06-151-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | The MAXSMP config option requires CPUMASK_OFFSTACK, which in turn requires we init the memory for the maps while we bring up the cpus. MAXSMP also increases NR_CPUS to 4096. This increase in size exposed an issue in the argument construction for multicalls from xen_flush_tlb_others. The args should only need space for the actual number of cpus. Also in 2.6.39 it exposes a bootup problem. BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff8157a1d3>] set_cpu_sibling_map+0x123/0x30d ... Call Trace: [<ffffffff81039a3f>] ? xen_restore_fl_direct_reloc+0x4/0x4 [<ffffffff819dc4db>] xen_smp_prepare_cpus+0x36/0x135 .. CC: stable@kernel.org Signed-off-by: Andrew Jones <drjones@redhat.com> [v2: Updated to compile on 3.0] [v3: Updated to compile when CONFIG_SMP is not defined] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen: partially revert "xen: set max_pfn_mapped to the last pfn mapped"Stefano Stabellini2011-06-091-1/+8
| | | | | | | | | | | | | | | | | We only need to set max_pfn_mapped to the last pfn mapped on x86_64 to make sure that cleanup_highmap doesn't remove important mappings at _end. We don't need to do this on x86_32 because cleanup_highmap is not called on x86_32. Besides lowering max_pfn_mapped on x86_32 has the unwanted side effect of limiting the amount of memory available for the 1:1 kernel pagetable allocation. This patch reverts the x86_32 part of the original patch. CC: stable@kernel.org Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* Merge branch 'upstream/tidy-xen-mmu-2.6.39' of ↵Linus Torvalds2011-05-261-234/+50
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen * 'upstream/tidy-xen-mmu-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: xen: fix compile without CONFIG_XEN_DEBUG_FS Use arbitrary_virt_to_machine() to deal with ioremapped pud updates. Use arbitrary_virt_to_machine() to deal with ioremapped pmd updates. xen/mmu: remove all ad-hoc stats stuff xen: use normal virt_to_machine for ptes xen: make a pile of mmu pvop functions static vmalloc: remove vmalloc_sync_all() from alloc_vm_area() xen: condense everything onto xen_set_pte xen: use mmu_update for xen_set_pte_at() xen: drop all the special iomap pte paths.
| * xen: fix compile without CONFIG_XEN_DEBUG_FSJeremy Fitzhardinge2011-05-201-0/+2
| | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * Use arbitrary_virt_to_machine() to deal with ioremapped pud updates.Jeremy Fitzhardinge2011-05-201-1/+1
| | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * Use arbitrary_virt_to_machine() to deal with ioremapped pmd updates.Jeremy Fitzhardinge2011-05-201-1/+1
| | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen/mmu: remove all ad-hoc stats stuffJeremy Fitzhardinge2011-05-201-138/+0
| | | | | | | | | | | | To make way for tracing. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen: use normal virt_to_machine for ptesJeremy Fitzhardinge2011-05-201-5/+5
| | | | | | | | | | | | | | | | We no longer support HIGHPTE allocations, so ptes should always be within the kernel's direct map, and don't need pagetable walks to convert to machine addresses. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen: make a pile of mmu pvop functions staticJeremy Fitzhardinge2011-05-201-23/+23
| | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen: condense everything onto xen_set_pteJeremy Fitzhardinge2011-05-201-46/+27
| | | | | | | | | | | | | | | | | | | | | | xen_set_pte_at and xen_clear_pte are essentially identical to xen_set_pte, so just make them all common. When batched set_pte and pte_clear are the same, but the unbatch operation must be different: they need to update the two halves of the pte in different order. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen: use mmu_update for xen_set_pte_at()Jeremy Fitzhardinge2011-05-201-15/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In principle update_va_mapping is a good match for set_pte_at, since it gets the address being mapped, which allows Xen to use its linear pagetable mapping. However that assumes that the pmd for the address is attached to the current pagetable, which may not be true for a given user address space because the kernel pmd is not shared (at least on 32-bit guests). Normally the kernel will automatically sync a missing part of the pagetable with the init_mm pagetable transparently via faults, but that fails when a missing address is passed to Xen. And while the linear pagetable mapping is very useful for 32-bit Xen (as it avoids an explicit domain mapping), 32-bit Xen is deprecated. 64-bit Xen has all memory mapped all the time, so it makes no real difference. The upshot is that we should use mmu_update, since it can operate on non-current pagetables or detached pagetables. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen: drop all the special iomap pte paths.Jeremy Fitzhardinge2011-05-201-25/+0
| | | | | | | | | | | | | | Xen can work out when we're doing IO mappings for itself, so we don't need to do anything special, and the extra tests just clog things up. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| |
| \
| \
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*---. \ Merge branches 'stable/irq', 'stable/p2m.bugfixes', 'stable/e820.bugfixes' ↵Linus Torvalds2011-05-191-1/+1
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | and 'stable/mmu.bugfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/irq' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: do not clear and mask evtchns in __xen_evtchn_do_upcall * 'stable/p2m.bugfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/p2m: Create entries in the P2M_MFN trees's to track 1-1 mappings * 'stable/e820.bugfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/setup: Fix for incorrect xen_extra_mem_start initialization under 32-bit xen/setup: Ignore E820_UNUSABLE when setting 1-1 mappings. * 'stable/mmu.bugfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen mmu: fix a race window causing leave_mm BUG()
| | | * | xen mmu: fix a race window causing leave_mm BUG()Tian, Kevin2011-05-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's a race window in xen_drop_mm_ref, where remote cpu may exit dirty bitmap between the check on this cpu and the point where remote cpu handles drop request. So in drop_other_mm_ref we need check whether TLB state is still lazy before calling into leave_mm. This bug is rarely observed in earlier kernel, but exaggerated by the commit 831d52bc153971b70e64eccfbed2b232394f22f8 ("x86, mm: avoid possible bogus tlb entries by clearing prev mm_cpumask after switching mm") which clears bitmap after changing the TLB state. the call trace is as below: --------------------------------- kernel BUG at arch/x86/mm/tlb.c:61! invalid opcode: 0000 [#1] SMP last sysfs file: /sys/devices/system/xen_memory/xen_memory0/info/current_kb CPU 1 Modules linked in: 8021q garp xen_netback xen_blkback blktap blkback_pagemap nbd bridge stp llc autofs4 ipmi_devintf ipmi_si ipmi_msghandler lockd sunrpc bonding ipv6 xenfs dm_multipath video output sbs sbshc parport_pc lp parport ses enclosure snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device serio_raw bnx2 snd_pcm_oss snd_mixer_oss snd_pcm snd_timer iTCO_wdt snd soundcore snd_page_alloc i2c_i801 iTCO_vendor_support i2c_core pcs pkr pata_acpi ata_generic ata_piix shpchp mptsas mptscsih mptbase [last unloaded: freq_table] Pid: 25581, comm: khelper Not tainted 2.6.32.36fixxen #1 Tecal RH2285 RIP: e030:[<ffffffff8103a3cb>] [<ffffffff8103a3cb>] leave_mm+0x15/0x46 RSP: e02b:ffff88002805be48 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88015f8e2da0 RDX: ffff88002805be78 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff88002805be48 R08: ffff88009d662000 R09: dead000000200200 R10: dead000000100100 R11: ffffffff814472b2 R12: ffff88009bfc1880 R13: ffff880028063020 R14: 00000000000004f6 R15: 0000000000000000 FS: 00007f62362d66e0(0000) GS:ffff880028058000(0000) knlGS:0000000000000000 CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000003aabc11909 CR3: 000000009b8ca000 CR4: 0000000000002660 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 00000000000000 00 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process khelper (pid: 25581, threadinfo ffff88007691e000, task ffff88009b92db40) Stack: ffff88002805be68 ffffffff8100e4ae 0000000000000001 ffff88009d733b88 <0> ffff88002805be98 ffffffff81087224 ffff88002805be78 ffff88002805be78 <0> ffff88015f808360 00000000000004f6 ffff88002805bea8 ffffffff81010108 Call Trace: <IRQ> [<ffffffff8100e4ae>] drop_other_mm_ref+0x2a/0x53 [<ffffffff81087224>] generic_smp_call_function_single_interrupt+0xd8/0xfc [<ffffffff81010108>] xen_call_function_single_interrupt+0x13/0x28 [<ffffffff810a936a>] handle_IRQ_event+0x66/0x120 [<ffffffff810aac5b>] handle_percpu_irq+0x41/0x6e [<ffffffff8128c1c0>] __xen_evtchn_do_upcall+0x1ab/0x27d [<ffffffff8128dd11>] xen_evtchn_do_upcall+0x33/0x46 [<ffffffff81013efe>] xen_do_hyper visor_callback+0x1e/0x30 <EOI> [<ffffffff814472b2>] ? _spin_unlock_irqrestore+0x15/0x17 [<ffffffff8100f8cf>] ? xen_restore_fl_direct_end+0x0/0x1 [<ffffffff81113f71>] ? flush_old_exec+0x3ac/0x500 [<ffffffff81150dc5>] ? load_elf_binary+0x0/0x17ef [<ffffffff81150dc5>] ? load_elf_binary+0x0/0x17ef [<ffffffff8115115d>] ? load_elf_binary+0x398/0x17ef [<ffffffff81042fcf>] ? need_resched+0x23/0x2d [<ffffffff811f4648>] ? process_measurement+0xc0/0xd7 [<ffffffff81150dc5>] ? load_elf_binary+0x0/0x17ef [<ffffffff81113094>] ? search_binary_handler+0xc8/0x255 [<ffffffff81114362>] ? do_execve+0x1c3/0x29e [<ffffffff8101155d>] ? sys_execve+0x43/0x5d [<ffffffff8106fc45>] ? __call_usermodehelper+0x0/0x6f [<ffffffff81013e28>] ? kernel_execve+0x68/0xd0 [<ffffffff 8106fc45>] ? __call_usermodehelper+0x0/0x6f [<ffffffff8100f8cf>] ? xen_restore_fl_direct_end+0x0/0x1 [<ffffffff8106fb64>] ? ____call_usermodehelper+0x113/0x11e [<ffffffff81013daa>] ? child_rip+0xa/0x20 [<ffffffff8106fc45>] ? __call_usermodehelper+0x0/0x6f [<ffffffff81012f91>] ? int_ret_from_sys_call+0x7/0x1b [<ffffffff8101371d>] ? retint_restore_args+0x5/0x6 [<ffffffff81013da0>] ? child_rip+0x0/0x20 Code: 41 5e 41 5f c9 c3 55 48 89 e5 0f 1f 44 00 00 e8 17 ff ff ff c9 c3 55 48 89 e5 0f 1f 44 00 00 65 8b 04 25 c8 55 01 00 ff c8 75 04 <0f> 0b eb fe 65 48 8b 34 25 c0 55 01 00 48 81 c6 b8 02 00 00 e8 RIP [<ffffffff8103a3cb>] leave_mm+0x15/0x46 RSP <ffff88002805be48> ---[ end trace ce9cee6832a9c503 ]--- Tested-by: Maoxiaoyun<tinnycloud@hotmail.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com> [v1: Fleshed out the git description a bit] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | | | | arch/x86/xen/mmu: Cleanup code/data sections definitionsDaniel Kiper2011-05-191-17/+17
| |_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cleanup code/data sections definitions accordingly to include/linux/init.h. Signed-off-by: Daniel Kiper <dkiper@net-space.pl> [v1: Rebased on top of latest linus's to include fixes in mmu.c] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 01:24:46 +0000