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* [IA64] Don't go beyond iosapic_intr_info's arraysizeRoel Kluin2009-02-251-1/+1
| | | | | | | | | | | | | | | vi arch/ia64/kernel/iosapic.c +142 static struct iosapic_intr_info { ... } iosapic_intr_info[NR_IRQS]; But at line 510 we have: for (i = 0; i <= NR_IRQS; i++) { s/<=/</ Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Do not go beyond ARRAY_SIZE of unw.hashRoel Kluin2009-02-251-1/+1
| | | | | | | | | | | | | | | | | static struct { ... :114 unsigned short hash[UNW_HASH_SIZE]; ... :2152 for (index = 0; index <= UNW_HASH_SIZE; ++index) { This is a bug, isn't it? s/<=/</ Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Remove redundant cpu_clear() in __cpu_disable pathAlex Chiang2009-02-191-2/+1
| | | | | | | | The second call to cpu_clear() is redundant, as we've already removed the CPU from cpu_online_map before calling migrate_platform_irqs(). Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Tony Luck <aegl@agluck-desktop.(none)>
* [IA64] Revert "prevent ia64 from invoking irq handlers on offline CPUs"Alex Chiang2009-02-191-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit e7b140365b86aaf94374214c6f4e6decbee2eb0a. Commit e7b14036 removes the targetted disabled CPU from the cpu_online_map after calls to migrate_platform_irqs and fixup_irqs. Paul McKenney states that the reasoning behind the patch was to prevent irq handlers from running on CPUs marked offline because: RCU happily ignores CPUs that don't have their bits set in cpu_online_map, so if there are RCU read-side critical sections in the irq handlers being run, RCU will ignore them. If the other CPUs were running, they might sequence through the RCU state machine, which could result in data structures being yanked out from under those irq handlers, which in turn could result in oopses or worse. Unfortunately, both ia64 functions above look at cpu_online_map to find a new CPU to migrate interrupts onto. This means we can potentially migrate an interrupt off ourself back to... ourself. Uh oh. This causes an oops when we finally try to process pending interrupts on the CPU we want to disable. The oops results from calling __do_IRQ with a NULL pt_regs: Unable to handle kernel NULL pointer dereference (address 0000000000000040) Call Trace: [<a000000100016930>] show_stack+0x50/0xa0 sp=e0000009c922fa00 bsp=e0000009c92214d0 [<a0000001000171a0>] show_regs+0x820/0x860 sp=e0000009c922fbd0 bsp=e0000009c9221478 [<a00000010003c700>] die+0x1a0/0x2e0 sp=e0000009c922fbd0 bsp=e0000009c9221438 [<a0000001006e92f0>] ia64_do_page_fault+0x950/0xa80 sp=e0000009c922fbd0 bsp=e0000009c92213d8 [<a00000010000c7a0>] ia64_native_leave_kernel+0x0/0x270 sp=e0000009c922fc60 bsp=e0000009c92213d8 [<a0000001000ecdb0>] profile_tick+0xd0/0x1c0 sp=e0000009c922fe30 bsp=e0000009c9221398 [<a00000010003bb90>] timer_interrupt+0x170/0x3e0 sp=e0000009c922fe30 bsp=e0000009c9221330 [<a00000010013a800>] handle_IRQ_event+0x80/0x120 sp=e0000009c922fe30 bsp=e0000009c92212f8 [<a00000010013aa00>] __do_IRQ+0x160/0x4a0 sp=e0000009c922fe30 bsp=e0000009c9221290 [<a000000100012290>] ia64_process_pending_intr+0x2b0/0x360 sp=e0000009c922fe30 bsp=e0000009c9221208 [<a0000001000112d0>] fixup_irqs+0xf0/0x2a0 sp=e0000009c922fe30 bsp=e0000009c92211a8 [<a00000010005bd80>] __cpu_disable+0x140/0x240 sp=e0000009c922fe30 bsp=e0000009c9221168 [<a0000001006c5870>] take_cpu_down+0x50/0xa0 sp=e0000009c922fe30 bsp=e0000009c9221148 [<a000000100122610>] stop_cpu+0xd0/0x200 sp=e0000009c922fe30 bsp=e0000009c92210f0 [<a0000001000e0440>] kthread+0xc0/0x140 sp=e0000009c922fe30 bsp=e0000009c92210c8 [<a000000100014ab0>] kernel_thread_helper+0xd0/0x100 sp=e0000009c922fe30 bsp=e0000009c92210a0 [<a00000010000a4c0>] start_kernel_thread+0x20/0x40 sp=e0000009c922fe30 bsp=e0000009c92210a0 I don't like this revert because it is fragile. ia64 is getting lucky because we seem to only ever process timer interrupts in this path, but if we ever race with an IPI here, we definitely use RCU and have the potential of hitting an oops that Paul describes above. Patching ia64's timer_interrupt() to check for NULL pt_regs is insufficient though, as we still hit the above oops. As a short term solution, I do think that this revert is the right answer. The revert hold up under repeated testing (24+ hour test runs) with this setup: - 8-way rx6600 - randomly toggling CPU online/offline state every 2 seconds - running CPU exercisers, memory hog, disk exercisers, and network stressors - average system load around ~160 In the long term, we really need to figure out why we set pt_regs = NULL in ia64_process_pending_intr(). If it turns out that it is unnecessary to do so, then we could safely re-introduce e7b14036 (along with some other logic to be smarter about migrating interrupts). One final note: x86 also removes the disabled CPU from cpu_online_map and then re-enables interrupts for 1ms, presumably to handle any pending interrupts: arch/x86/kernel/irq_32.c (and irq_64.c): cpu_disable_common: [remove cpu from cpu_online_map] fixup_irqs(): for_each_irq: [break CPU affinities] local_irq_enable(); mdelay(1); local_irq_disable(); So they are doing implicitly what ia64 is doing explicitly. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Tony Luck <aegl@agluck-desktop.(none)>
* Merge branch 'misc' into releaseLen Brown2009-01-161-1/+1
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| * kprobes: check CONFIG_FREEZER instead of CONFIG_PMMasami Hiramatsu2009-01-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Check CONFIG_FREEZER instead of CONFIG_PM because kprobe booster depends on freeze_processes() and thaw_processes() when CONFIG_PREEMPT=y. This fixes a linkage error which occurs when CONFIG_PREEMPT=y, CONFIG_PM=y and CONFIG_FREEZER=n. Reported-by: Cheng Renquan <crquan@gmail.com> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Len Brown <len.brown@intel.com>
* | [IA64] dump stack on kernel unaligned warningsDoug Chapman2009-01-151-1/+5
| | | | | | | | | | | | | | | | | | | | | | Often the cause of kernel unaligned access warnings is not obvious from just the ip displayed in the warning. This adds the option via proc to dump the stack in addition to the warning. The default is off (just display the 1 line warning). To enable the stack to be shown: echo 1 > /proc/sys/kernel/unaligned-dump-stack Signed-off-by: Doug Chapman <doug.chapman@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | [CVE-2009-0029] Remove __attribute__((weak)) from sys_pipe/sys_pipe2Heiko Carstens2009-01-142-2/+2
|/ | | | | | | | | | | | | Remove __attribute__((weak)) from common code sys_pipe implemantation. IA64, ALPHA, SUPERH (32bit) and SPARC (32bit) have own implemantations with the same name. Just rename them. For sys_pipe2 there is no architecture specific implementation. Cc: Richard Henderson <rth@twiddle.net> Cc: David S. Miller <davem@davemloft.net> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* Merge branch 'cpus4096-for-linus' of ↵Linus Torvalds2009-01-101-9/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'cpus4096-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: [IA64] fix typo in cpumask_of_pcibus() x86: fix x86_32 builds for summit and es7000 arch's cpumask: use work_on_cpu in acpi-cpufreq.c for read_measured_perf_ctrs cpumask: use work_on_cpu in acpi-cpufreq.c for drv_read and drv_write cpumask: use cpumask_var_t in acpi-cpufreq.c cpumask: use work_on_cpu in acpi/cstate.c cpumask: convert struct cpufreq_policy to cpumask_var_t cpumask: replace CPUMASK_ALLOC etc with cpumask_var_t x86: cleanup remaining cpumask_t ops in smpboot code cpumask: update pci_bus_show_cpuaffinity to use new cpumask API cpumask: update local_cpus_show to use new cpumask API ia64: cpumask fix for is_affinity_mask_valid()
| * ia64: cpumask fix for is_affinity_mask_valid()Mike Travis2009-01-041-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup The function prototype should use 'struct cpumask *' to declare cpumask arguments (instead of cpumask_var_t). Note: arch/ia64/kernel/irq.c still had the following "old cpumask_t" usages: 105: cpumask_t mask = CPU_MASK_NONE; 107: cpu_set(cpu_logical_id(hwid), mask); 110: irq_desc[irq].affinity = mask; ... replaced with a simple "cpumask_of(cpu_logical_id(hwid))". 161: new_cpu = any_online_cpu(cpu_online_map); 194: time_keeper_id = first_cpu(cpu_online_map); ... replaced with cpu_online_mask refs. Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'linus' into releaseLen Brown2009-01-0913-75/+80
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| * \ Merge branch 'for-linus' of ↵Linus Torvalds2009-01-071-1/+1
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (24 commits) trivial: chack -> check typo fix in main Makefile trivial: Add a space (and a comma) to a printk in 8250 driver trivial: Fix misspelling of "firmware" in docs for ncr53c8xx/sym53c8xx trivial: Fix misspelling of "firmware" in powerpc Makefile trivial: Fix misspelling of "firmware" in usb.c trivial: Fix misspelling of "firmware" in qla1280.c trivial: Fix misspelling of "firmware" in a100u2w.c trivial: Fix misspelling of "firmware" in megaraid.c trivial: Fix misspelling of "firmware" in ql4_mbx.c trivial: Fix misspelling of "firmware" in acpi_memhotplug.c trivial: Fix misspelling of "firmware" in ipw2100.c trivial: Fix misspelling of "firmware" in atmel.c trivial: Fix misspelled firmware in Kconfig trivial: fix an -> a typos in documentation and comments trivial: fix then -> than typos in comments and documentation trivial: update Jesper Juhl CREDITS entry with new email trivial: fix singal -> signal typo trivial: Fix incorrect use of "loose" in event.c trivial: printk: fix indentation of new_text_line declaration trivial: rtc-stk17ta8: fix sparse warning ...
| | * | trivial: fix then -> than typos in comments and documentationFrederik Schwarzer2009-01-061-1/+1
| | |/ | | | | | | | | | | | | | | | | | | - (better, more, bigger ...) then -> (...) than Signed-off-by: Frederik Schwarzer <schwarzerf@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * | Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds2009-01-061-1/+1
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (60 commits) uio: make uio_info's name and version const UIO: Documentation for UIO ioport info handling UIO: Pass information about ioports to userspace (V2) UIO: uio_pdrv_genirq: allow custom irq_flags UIO: use pci_ioremap_bar() in drivers/uio arm: struct device - replace bus_id with dev_name(), dev_set_name() libata: struct device - replace bus_id with dev_name(), dev_set_name() avr: struct device - replace bus_id with dev_name(), dev_set_name() block: struct device - replace bus_id with dev_name(), dev_set_name() chris: struct device - replace bus_id with dev_name(), dev_set_name() dmi: struct device - replace bus_id with dev_name(), dev_set_name() gadget: struct device - replace bus_id with dev_name(), dev_set_name() gpio: struct device - replace bus_id with dev_name(), dev_set_name() gpu: struct device - replace bus_id with dev_name(), dev_set_name() hwmon: struct device - replace bus_id with dev_name(), dev_set_name() i2o: struct device - replace bus_id with dev_name(), dev_set_name() IA64: struct device - replace bus_id with dev_name(), dev_set_name() i7300_idle: struct device - replace bus_id with dev_name(), dev_set_name() infiniband: struct device - replace bus_id with dev_name(), dev_set_name() ISDN: struct device - replace bus_id with dev_name(), dev_set_name() ...
| | * | IA64: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers2009-01-061-1/+1
| | |/ | | | | | | | | | | | | | | | Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * / kprobes: add kprobe_insn_mutex and cleanup arch_remove_kprobe()Masami Hiramatsu2009-01-061-3/+5
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add kprobe_insn_mutex for protecting kprobe_insn_pages hlist, and remove kprobe_mutex from architecture dependent code. This allows us to call arch_remove_kprobe() (and free_insn_slot) while holding kprobe_mutex. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * Merge branch 'cpus4096-for-linus-3' of ↵Linus Torvalds2009-01-033-16/+14
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (77 commits) x86: setup_per_cpu_areas() cleanup cpumask: fix compile error when CONFIG_NR_CPUS is not defined cpumask: use alloc_cpumask_var_node where appropriate cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t x86: use cpumask_var_t in acpi/boot.c x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids sched: put back some stack hog changes that were undone in kernel/sched.c x86: enable cpus display of kernel_max and offlined cpus ia64: cpumask fix for is_affinity_mask_valid() cpumask: convert RCU implementations, fix xtensa: define __fls mn10300: define __fls m32r: define __fls h8300: define __fls frv: define __fls cris: define __fls cpumask: CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS cpumask: zero extra bits in alloc_cpumask_var_node cpumask: replace for_each_cpu_mask_nr with for_each_cpu in kernel/time/ cpumask: convert mm/ ...
| | * ia64: cpumask fix for is_affinity_mask_valid()Ingo Molnar2009-01-031-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: build fix on ia64 ia64's default_affinity_write() still had old cpumask_t usage: /home/mingo/tip/kernel/irq/proc.c: In function `default_affinity_write': /home/mingo/tip/kernel/irq/proc.c:114: error: incompatible type for argument 1 of `is_affinity_mask_valid' make[3]: *** [kernel/irq/proc.o] Error 1 make[3]: *** Waiting for unfinished jobs.... update it to cpumask_var_t. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * cpumask: Remove IA64 definition of total_cpus now it's in core codeRusty Russell2009-01-011-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | Impact: fix IA64 compile Fortunately, they have exactly the same semantics. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * Merge branch 'master' of ↵Rusty Russell2008-12-303-19/+30
| | |\ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
| | * | cpumask: IA64: Introduce cpumask_of_{node,pcibus} to replace ↵Rusty Russell2008-12-262-13/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | {node,pcibus}_to_cpumask Impact: New APIs The old node_to_cpumask/node_to_pcibus returned a cpumask_t: these return a pointer to a struct cpumask. Part of removing cpumasks from the stack. We can also use the new for_each_cpu_and() to avoid a temporary cpumask, and a gratuitous test in sn_topology_show. (Includes fix from KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Tony Luck <tony.luck@intel.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
| * | | Merge branch 'cputime' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds2009-01-031-8/+10
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'cputime' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [PATCH] fast vdso implementation for CLOCK_THREAD_CPUTIME_ID [PATCH] improve idle cputime accounting [PATCH] improve precision of idle time detection. [PATCH] improve precision of process accounting. [PATCH] idle cputime accounting [PATCH] fix scaled & unscaled cputime accounting
| | * | | [PATCH] idle cputime accountingMartin Schwidefsky2008-12-311-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The cpu time spent by the idle process actually doing something is currently accounted as idle time. This is plain wrong, the architectures that support VIRT_CPU_ACCOUNTING=y can do better: distinguish between the time spent doing nothing and the time spent by idle doing work. The first is accounted with account_idle_time and the second with account_system_time. The architectures that use the account_xxx_time interface directly and not the account_xxx_ticks interface now need to do the check for the idle process in their arch code. In particular to improve the system vs true idle time accounting the arch code needs to measure the true idle time instead of just testing for the idle process. To improve the tick based accounting as well we would need an architecture primitive that can tell us if the pt_regs of the interrupted context points to the magic instruction that halts the cpu. In addition idle time is no more added to the stime of the idle process. This field now contains the system time of the idle process as it should be. On systems without VIRT_CPU_ACCOUNTING this will always be zero as every tick that occurs while idle is running will be accounted as idle time. This patch contains the necessary common code changes to be able to distinguish idle system time and true idle time. The architectures with support for VIRT_CPU_ACCOUNTING need some changes to exploit this. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| | * | | [PATCH] fix scaled & unscaled cputime accountingMartin Schwidefsky2008-12-311-8/+4
| | | |/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The utimescaled / stimescaled fields in the task structure and the global cpustat should be set on all architectures. On s390 the calls to account_user_time_scaled and account_system_time_scaled never have been added. In addition system time that is accounted as guest time to the user time of a process is accounted to the scaled system time instead of the scaled user time. To fix the bugs and to prevent future forgetfulness this patch merges account_system_time_scaled into account_system_time and account_user_time_scaled into account_user_time. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Michael Neuling <mikey@neuling.org> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | Merge branch 'cpus4096-for-linus-2' of ↵Linus Torvalds2009-01-025-26/+19
| |\ \ \ | | | |/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (66 commits) x86: export vector_used_by_percpu_irq x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and() sched: nominate preferred wakeup cpu, fix x86: fix lguest used_vectors breakage, -v2 x86: fix warning in arch/x86/kernel/io_apic.c sched: fix warning in kernel/sched.c sched: move test_sd_parent() to an SMP section of sched.h sched: add SD_BALANCE_NEWIDLE at MC and CPU level for sched_mc>0 sched: activate active load balancing in new idle cpus sched: bias task wakeups to preferred semi-idle packages sched: nominate preferred wakeup cpu sched: favour lower logical cpu number for sched_mc balance sched: framework for sched_mc/smt_power_savings=N sched: convert BALANCE_FOR_xx_POWER to inline functions x86: use possible_cpus=NUM to extend the possible cpus allowed x86: fix cpu_mask_to_apicid_and to include cpu_online_mask x86: update io_apic.c to the new cpumask code x86: Introduce topology_core_cpumask()/topology_thread_cpumask() x86: xen: use smp_call_function_many() x86: use work_on_cpu in x86/kernel/cpu/mcheck/mce_amd_64.c ... Fixed up trivial conflict in kernel/time/tick-sched.c manually
| | * | cpumask: make irq_set_affinity() take a const struct cpumaskRusty Russell2008-12-134-19/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: change existing irq_chip API Not much point with gentle transition here: the struct irq_chip's setaffinity method signature needs to change. Fortunately, not widely used code, but hits a few architectures. Note: In irq_select_affinity() I save a temporary in by mangling irq_desc[irq].affinity directly. Ingo, does this break anything? (Folded in fix from KOSAKI Motohiro) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Grant Grundler <grundler@parisc-linux.org> Acked-by: Ingo Molnar <mingo@redhat.com> Cc: ralf@linux-mips.org Cc: grundler@parisc-linux.org Cc: jeremy@xensource.com Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
| | * | cpumask: change cpumask_scnprintf, cpumask_parse_user, cpulist_parse, and ↵Rusty Russell2008-12-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cpulist_scnprintf to take pointers. Impact: change calling convention of existing cpumask APIs Most cpumask functions started with cpus_: these have been replaced by cpumask_ ones which take struct cpumask pointers as expected. These four functions don't have good replacement names; fortunately they're rarely used, so we just change them over. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: paulus@samba.org Cc: mingo@redhat.com Cc: tony.luck@intel.com Cc: ralf@linux-mips.org Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: cl@linux-foundation.org Cc: srostedt@redhat.com
| | * | cpumask: centralize cpu_online_map and cpu_possible_mapRusty Russell2008-12-131-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Each SMP arch defines these themselves. Move them to a central location. Twists: 1) Some archs (m32, parisc, s390) set possible_map to all 1, so we add a CONFIG_INIT_ALL_POSSIBLE for this rather than break them. 2) mips and sparc32 '#define cpu_possible_map phys_cpu_present_map'. Those archs simply have phys_cpu_present_map replaced everywhere. 3) Alpha defined cpu_possible_map to cpu_present_map; this is tricky so I just manipulate them both in sync. 4) IA64, cris and m32r have gratuitous 'extern cpumask_t cpu_possible_map' declarations. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Reviewed-by: Grant Grundler <grundler@parisc-linux.org> Tested-by: Tony Luck <tony.luck@intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Mike Travis <travis@sgi.com> Cc: ink@jurassic.park.msu.ru Cc: rmk@arm.linux.org.uk Cc: starvik@axis.com Cc: tony.luck@intel.com Cc: takata@linux-m32r.org Cc: ralf@linux-mips.org Cc: grundler@parisc-linux.org Cc: paulus@samba.org Cc: schwidefsky@de.ibm.com Cc: lethal@linux-sh.org Cc: wli@holomorphy.com Cc: davem@davemloft.net Cc: jdike@addtoit.com Cc: mingo@redhat.com
| * | | take init_fs to saner placeAl Viro2008-12-311-1/+0
| | |/ | |/| | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | Merge branch 'next' into for-linusJames Morris2008-12-253-19/+30
| |\ \ | | |/ | |/|
| | * Merge branch 'master' into nextJames Morris2008-12-045-4/+4
| | |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: fs/nfsd/nfs4recover.c Manually fixed above to use new creds API functions, e.g. nfs4_save_creds(). Signed-off-by: James Morris <jmorris@namei.org>
| | * \ Merge branch 'master' into nextJames Morris2008-11-143-11/+29
| | |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: security/keys/internal.h security/keys/process_keys.c security/keys/request_key.c Fixed conflicts above by using the non 'tsk' versions. Signed-off-by: James Morris <jmorris@namei.org>
| | * | | CRED: Use RCU to access another task's creds and to release a task's own credsDavid Howells2008-11-141-12/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use RCU to access another task's creds and to release a task's own creds. This means that it will be possible for the credentials of a task to be replaced without another task (a) requiring a full lock to read them, and (b) seeing deallocated memory. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: James Morris <jmorris@namei.org>
| | * | | CRED: Wrap task credential accesses in the IA64 archDavid Howells2008-11-143-13/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Wrap access to task credentials so that they can be separated more easily from the task_struct during the introduction of COW creds. Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id(). Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more sense to use RCU directly rather than a convenient wrapper; these will be addressed by later patches. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-ia64@vger.kernel.org Signed-off-by: James Morris <jmorris@namei.org>
* | | | | ACPI : Use RSDT instead of XSDT by adding boot option of "acpi=rsdt"Zhao Yakui2009-01-091-0/+1
|/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On some boxes there exist both RSDT and XSDT table. But unfortunately sometimes there exists the following error when XSDT table is used: a. 32/64X address mismatch b. The 32/64X FACS address mismatch In such case the boot option of "acpi=rsdt" is provided so that RSDT is tried instead of XSDT table when the system can't work well. http://bugzilla.kernel.org/show_bug.cgi?id=8246 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> cc:Thomas Renninger <trenn@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
* | | / [IA64] Clear up section mismatch with arch_unregister_cpu()Robin Holt2008-12-091-1/+3
| |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | The generic_defconfig has three section mismatches. This clears arch_unregister_cpu() Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | [IA64] ia64/pv_ops/pv_cpu_ops: fix _IA64_REG_IP case.Isaku Yamahata2008-11-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | pv_cpu_ops.getreg(_IA64_REG_IP) returned constant. But the returned ip valued should be the one in the caller, not of the callee. This patch fixes that. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | [IA64] remove duplicate include iommu.hHuang Weiyi2008-11-201-1/+0
| | | | | | | | | | | | | | | | | | | | | arch/ia64/kernel/pci-dma.c only needs to include iommu once. Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | [IA64] use mprintk instead of printk, in ia64_mca_modify_original_stackHidetoshi Seto2008-11-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Using printk from MCA/INIT context is unsafe since it can cause deadlock. The ia64_mca_modify_original_stack is called from both of mca handler and init handler, so it should use mprintk instead of printk. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | [IA64] Rationalize kernel mode alignment checkingTony Luck2008-11-202-1/+2
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Itanium processors can handle some misaligned data accesses. They also provide a mode where all such accesses are forced to trap. The kernel was schizophrenic about use of this mode: * Base kernel code ran in permissive mode where the only traps generated were from those cases that the h/w could not handle. * Interrupt, syscall and trap code ran in strict mode where all unaligned accesses caused traps to the 0x5a00 unaligned reference vector. Use strict alignment checking throughout the kernel, but make sure that we continue to let user mode use more relaxed mode as the default. Signed-off-by: Tony Luck <tony.luck@intel.com>
* | [IA64] Reserve elfcorehdr memory in CONFIG_CRASH_DUMPJay Lan2008-11-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | IA64 kdump kernel failed to initialize /proc/vmcore in 2.6.28-rc2. A bug was introduced in this patch commit: d9a9855d0b06ca6d6cc92596fedcc03f8512e062 always reserve elfcore header memory in crash kernel The problem was that the call to reserve_elfcorehdr() should be placed in CONFIG_CRASH_DUMP rather than in CONFIG_CRASH_KERNEL, which does not exist. Signed-off-by: Jay Lan <jlan@sgi.com> Acked-by: Simon Hormon <horms@verge.net.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | [IA64] fix boot panic caused by offline CPUsDoug Chapman2008-11-062-8/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a regression introduced by 2c6e6db41f01b6b4eb98809350827c9678996698 "Minimize per_cpu reservations." That patch incorrectly used information about what CPUs are possible that was not yet initialized by ACPI. The end result was that per_cpu structures for offline CPUs were not initialized causing a NULL pointer reference. Since we cannot do the full acpi_boot_init() call any earlier, the simplest fix is to just parse the MADT for SAPIC entries early to find the CPU info. This should also allow for some cleanup of the code added by the "Minimize per_cpu reservations". This patch just fixes the regressions, the cleanup will come in a later patch. Signed-off-by: Doug Chapman <doug.chapman@hp.com> Signed-off-by: Alex Chiang <achiang@hp.com> CC: Robin Holt <holt@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | [IA64] remove duplicated #include from pci-dma.cHuang Weiyi2008-11-041-2/+0
|/ | | | | | | | Removed duplicated #include <asm/machvec.h> and <linux/string.h> in arch/ia64/kernel/pci-dma.c. Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* saner FASYNC handling on file closeAl Viro2008-11-011-5/+0
| | | | | | | | | | | | | | As it is, all instances of ->release() for files that have ->fasync() need to remember to evict file from fasync lists; forgetting that creates a hole and we actually have a bunch that *does* forget. So let's keep our lives simple - let __fput() check FASYNC in file->f_flags and call ->fasync() there if it's been set. And lose that crap in ->release() instances - leaving it there is still valid, but we don't have to bother anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86/PCI: build failure at x86/kernel/pci-dma.c with !CONFIG_PCIFenghua Yu2008-10-241-7/+0
| | | | | | | | | | | | | | | | | On Thu, Oct 23, 2008 at 04:09:52PM -0700, Alexander Beregalov wrote: > arch/x86/kernel/built-in.o: In function `iommu_setup': > pci-dma.c:(.init.text+0x36ad): undefined reference to `forbid_dac' > pci-dma.c:(.init.text+0x36cc): undefined reference to `forbid_dac' > pci-dma.c:(.init.text+0x3711): undefined reference to `forbid_dac This patch partially reverts a patch to add IOMMU support to ia64. The forbid_dac variable was incorrectly moved to quirks.c, which isn't built when PCI is disabled. Tested-by: "Alexander Beregalov" <a.beregalov@gmail.com> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* Merge branch 'release' of ↵Linus Torvalds2008-10-2316-71/+468
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: (41 commits) [IA64] Fix annoying IA64_TR_ALLOC_MAX message. [IA64] kill sys32_pipe [IA64] remove sys32_pause [IA64] Add Variable Page Size and IA64 Support in Intel IOMMU ia64/pv_ops: paravirtualized instruction checker. ia64/xen: a recipe for using xen/ia64 with pv_ops. ia64/pv_ops: update Kconfig for paravirtualized guest and xen. ia64/xen: preliminary support for save/restore. ia64/xen: define xen machine vector for domU. ia64/pv_ops/xen: implement xen pv_time_ops. ia64/pv_ops/xen: implement xen pv_irq_ops. ia64/pv_ops/xen: define the nubmer of irqs which xen needs. ia64/pv_ops/xen: implement xen pv_iosapic_ops. ia64/pv_ops/xen: paravirtualize entry.S for ia64/xen. ia64/pv_ops/xen: paravirtualize ivt.S for xen. ia64/pv_ops/xen: paravirtualize DO_SAVE_MIN for xen. ia64/pv_ops/xen: define xen paravirtualized instructions for hand written assembly code ia64/pv_ops/xen: define xen pv_cpu_ops. ia64/pv_ops/xen: define xen pv_init_ops for various xen initialization. ia64/pv_ops/xen: elf note based xen startup. ...
| * Pull vtd-iommu into release branchTony Luck2008-10-176-13/+305
| |\ | | | | | | | | | | | | Conflicts: arch/ia64/kernel/acpi.c
| | * [IA64] Add Variable Page Size and IA64 Support in Intel IOMMUFenghua Yu2008-10-176-13/+305
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch contains Intel IOMMU IA64 specific code. It defines new machvec dig_vtd, hooks for IOMMU, DMAR table detection, cache line flush function, etc. For a generic kernel with CONFIG_DMAR=y, if Intel IOMMU is detected, dig_vtd is used for machinve vector. Otherwise, kernel falls back to dig machine vector. Kernel parameter "machvec=dig" or "intel_iommu=off" can be used to force kernel to boot dig machine vector. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | Pull pv_ops-xen into release branchTony Luck2008-10-178-6/+62
| |\ \
| | * | ia64/pv_ops: paravirtualized instruction checker.Isaku Yamahata2008-10-172-1/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements a checker to detect instructions which should be paravirtualized instead of direct writing raw instruction. This patch does rough check so that it doesn't fully cover all cases, but it can detects most cases of paravirtualization breakage of hand written assembly codes. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-19 08:37:51 +0000