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* Use helpers to obtain task pid in printks (arch code)Alexey Dobriyan2007-10-1937-157/+163
| | | | | | | | | | | | | | | One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* define global BIT macroJiri Slaby2007-10-191-1/+0
| | | | | | | | | | | | | | | | | | | | define global BIT macro move all local BIT defines to the new globally define macro. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> Cc: Dmitry Torokhov <dtor@mail.ru> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Russell King <rmk@arm.linux.org.uk> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: "John W. Linville" <linville@tuxdriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* remove asm/bitops.h includesJiri Slaby2007-10-199-9/+9
| | | | | | | | | | | | | remove asm/bitops.h includes including asm/bitops directly may cause compile errors. don't include it and include linux/bitops instead. next patch will deny including asm header directly. Cc: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pid namespaces: changes to show virtual ids to userPavel Emelyanov2007-10-194-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the largest patch in the set. Make all (I hope) the places where the pid is shown to or get from user operate on the virtual pids. The idea is: - all in-kernel data structures must store either struct pid itself or the pid's global nr, obtained with pid_nr() call; - when seeking the task from kernel code with the stored id one should use find_task_by_pid() call that works with global pids; - when showing pid's numerical value to the user the virtual one should be used, but however when one shows task's pid outside this task's namespace the global one is to be used; - when getting the pid from userspace one need to consider this as the virtual one and use appropriate task/pid-searching functions. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: nuther build fix] [akpm@linux-foundation.org: yet nuther build fix] [akpm@linux-foundation.org: remove unneeded casts] Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Paul Menage <menage@google.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pid namespaces: define is_global_init() and is_container_init()Serge E. Hallyn2007-10-1922-26/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | is_init() is an ambiguous name for the pid==1 check. Split it into is_global_init() and is_container_init(). A cgroup init has it's tsk->pid == 1. A global init also has it's tsk->pid == 1 and it's active pid namespace is the init_pid_ns. But rather than check the active pid namespace, compare the task structure with 'init_pid_ns.child_reaper', which is initialized during boot to the /sbin/init process and never changes. Changelog: 2.6.22-rc4-mm2-pidns1: - Use 'init_pid_ns.child_reaper' to determine if a given task is the global init (/sbin/init) process. This would improve performance and remove dependence on the task_pid(). 2.6.21-mm2-pidns2: - [Sukadev Bhattiprolu] Changed is_container_init() calls in {powerpc, ppc,avr32}/traps.c for the _exception() call to is_global_init(). This way, we kill only the cgroup if the cgroup's init has a bug rather than force a kernel panic. [akpm@linux-foundation.org: fix comment] [sukadev@us.ibm.com: Use is_global_init() in arch/m32r/mm/fault.c] [bunk@stusta.de: kernel/pid.c: remove unused exports] [sukadev@us.ibm.com: Fix capability.c to work with threaded init] Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com> Acked-by: Pavel Emelianov <xemul@openvz.org> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Herbert Poetzel <herbert@13thfloor.at> Cc: Kirill Korotaev <dev@sw.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pid namespaces: round up the APIPavel Emelianov2007-10-194-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | The set of functions process_session, task_session, process_group and task_pgrp is confusing, as the names can be mixed with each other when looking at the code for a long time. The proposals are to * equip the functions that return the integer with _nr suffix to represent that fact, * and to make all functions work with task (not process) by making the common prefix of the same name. For monotony the routines signal_session() and set_signal_session() are replaced with task_session_nr() and set_task_session(), especially since they are only used with the explicit task->signal dereference. Signed-off-by: Pavel Emelianov <xemul@openvz.org> Acked-by: Serge E. Hallyn <serue@us.ibm.com> Cc: Kirill Korotaev <dev@openvz.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* task cgroups: enable cgroups by default in some configsPaul Jackson2007-10-196-0/+6
| | | | | | | | | In pre-cgroup cpusets, a few config files enabled cpusets by default. Signed-off-by: Paul Jackson <pj@sgi.com> Cc: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* setup vma->vm_page_prot by vm_get_page_prot()Coly Li2007-10-191-1/+1
| | | | | | | | | | | | | This patch uses vm_get_page_prot() to setup vma->vm_page_prot. Though inside vm_get_page_prot() the protection flags is AND with (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED), it does not hurt correct code. Signed-off-by: Coly Li <coyli@suse.de> Cc: Hugh Dickins <hugh@veritas.com> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kmap leak fix for x86_32 kdumpFernando Luis Vázquez Cao2007-10-191-0/+1
| | | | | | | | | | copy_oldmem_page should not return leaving a page frame from the previous kernel mapped. Signed-off-by: Fernando Luis Vázquez Cao <fernando@oss.ntt.co.jp> Acked-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2007-10-1815-373/+469
|\ | | | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] time: Move R4000 clockevent device code to separate configurable file [MIPS] time: Delete dead cycles_per_jiffy, mips_timer_ack and null_timer_ack [MIPS] IP32: Retire use of plat_timer_setup. [MIPS] Jazz: Retire use of plat_timer_setup. [MIPS] IP27: Convert to clock_event_device. [MIPS] JMR3927: Convert to clock_event_device. [MIPS] Always do the ARC64_TWIDDLE_PC thing.
| * [MIPS] time: Move R4000 clockevent device code to separate configurable fileRalf Baechle2007-10-188-241/+318
| | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * [MIPS] time: Delete dead cycles_per_jiffy, mips_timer_ack and null_timer_ackRalf Baechle2007-10-181-21/+0
| | | | | | | | | | | | | | | | | | | | cycles_per_jiffy was only ever getting assigned and the function pointer not being called anymore and mips_timer_ack had gotten similarly stale. I leave the remaining assignments unfixed as a lighthouse pointing platform maintainers to what needs a rewrite. These changes make null_timer_ack() unreferenced, so delete that too. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * [MIPS] IP32: Retire use of plat_timer_setup.Ralf Baechle2007-10-181-6/+0
| | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * [MIPS] Jazz: Retire use of plat_timer_setup.Ralf Baechle2007-10-182-9/+5
| | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * [MIPS] IP27: Convert to clock_event_device.Ralf Baechle2007-10-182-66/+94
| | | | | | | | | | | | This separates the tick timer stuff from the generic MIPS time.c. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * [MIPS] JMR3927: Convert to clock_event_device.Ralf Baechle2007-10-181-19/+47
| | | | | | | | | | | | This separate the tick timer stuff from the generic MIPS time.c. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * [MIPS] Always do the ARC64_TWIDDLE_PC thing.Thomas Bogendoerfer2007-10-181-11/+5
| | | | | | | | | | | | | | | | Always jump to the place where the kernel is linked to. This helps where the bootloaders/proms ignores the start address inside the ELF header. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | Merge branch 'master' of ↵Linus Torvalds2007-10-182-6/+2
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (51 commits) [IPV6]: Fix again the fl6_sock_lookup() fixed locking [NETFILTER]: nf_conntrack_tcp: fix connection reopening fix [IPV6]: Fix race in ipv6_flowlabel_opt() when inserting two labels [IPV6]: Lost locking in fl6_sock_lookup [IPV6]: Lost locking when inserting a flowlabel in ipv6_fl_list [NETFILTER]: xt_sctp: fix mistake to pass a pointer where array is required [NET]: Fix OOPS due to missing check in dev_parse_header(). [TCP]: Remove lost_retrans zero seqno special cases [NET]: fix carrier-on bug? [NET]: Fix uninitialised variable in ip_frag_reasm() [IPSEC]: Rename mode to outer_mode and add inner_mode [IPSEC]: Disallow combinations of RO and AH/ESP/IPCOMP [IPSEC]: Use the top IPv4 route's peer instead of the bottom [IPSEC]: Store afinfo pointer in xfrm_mode [IPSEC]: Add missing BEET checks [IPSEC]: Move type and mode map into xfrm_state.c [IPSEC]: Fix length check in xfrm_parse_spi [IPSEC]: Move ip_summed zapping out of xfrm6_rcv_spi [IPSEC]: Get nexthdr from caller in xfrm6_rcv_spi [IPSEC]: Move tunnel parsing for IPv4 out of xfrm4_input ...
| * | [UMP]: header_ops conversion needed for non-ethernet driversJeff Dike2007-10-172-6/+2
| |/ | | | | | | | | | | | | | | UML's two non-ethernet drivers need some header_ops conversion. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'master' of ↵Linus Torvalds2007-10-186-64/+59
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC/64]: Consolidate of_register_driver [SPARC] Videopix Frame Grabber: Convert device_lock_sem to mutex [SPARC]: Support for new termios. [SPARC64]: Check of_get_property() return in pci_determine_mem_io_space(). [SPARC64]: Fix boot failures due to bootmem. [SPARC64]: Implement atomic backoff.
| * | [SPARC/64]: Consolidate of_register_driverStephen Rothwell2007-10-172-40/+0
| | | | | | | | | | | | | | | | | | | | | | | | Also of_unregister_driver. These will be shortly also used by the PowerPC code. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SPARC64]: Check of_get_property() return in pci_determine_mem_io_space().David S. Miller2007-10-171-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | If the PCI controller lacks the 'ranges' property nothing is going to work. Noticed by Al Viro. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SPARC64]: Fix boot failures due to bootmem.David S. Miller2007-10-171-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | Do not use *alloc_bootmem_low*(), because ARCH_LOW_ADDRESS_LIMIT is 4GB and this results in boot failures if all of the physical memory in the machine is above 4GB. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SPARC64]: Implement atomic backoff.David S. Miller2007-10-172-20/+48
| |/ | | | | | | | | | | | | | | | | | | When the cpu count is high and contention hits an atomic object, the processors can synchronize such that some cpus continually get knocked out and cannot complete the atomic update. So implement an exponential backoff when SMP. Signed-off-by: David S. Miller <davem@davemloft.net>
* | Replace __attribute_pure__ with __pureRalf Baechle2007-10-181-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To be consistent with the use of attributes in the rest of the kernel replace all use of __attribute_pure__ with __pure and delete the definition of __attribute_pure__. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <rmk@arm.linux.org.uk> Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | sparse pointer use of zero as nullStephen Hemminger2007-10-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Get rid of sparse related warnings from places that use integer as NULL pointer. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Andi Kleen <ak@suse.de> Cc: Jeff Garzik <jeff@garzik.org> Cc: Matt Mackall <mpm@selenic.com> Cc: Ian Kent <raven@themaw.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | x86 msr driver: Misc cpuinit annotationsSatyam Sharma2007-10-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | msr_class_cpu_callback() can be marked __cpuinit, being the notifier callback for a __cpuinitdata notifier_block. So can be marked msr_device_create() too, called only from the newly-__cpuinit msr_class_cpu_callback() or from __init-marked msr_init(). Signed-off-by: Satyam Sharma <satyam@infradead.org> Cc: Andi Kleen <ak@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | powerpc: add scaled time accountingMichael Neuling2007-10-182-2/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds POWERPC specific hooks for scaled time accounting. POWER6 includes a SPURR register. The SPURR is based off the PURR register but is scaled based on CPU frequency and issue rates. This gives a more accurate account of the instructions used per task. The PURR and timebase will be constant relative to the wall clock, irrespective of the CPU frequency. This implementation reads the SPURR register in account_system_vtime which is only call called on context witch and hard and soft irq entry and exit. The percentage of user and system time is then estimated using the ratio of these accounted by the PURR. If the SPURR is not present, the PURR read. An earlier implementation of this patch read the SPURR whenever the PURR was read, which included the system call entry and exit path. Unfortunately this showed a performance regression on lmbench runs, so was re-implemented. I've included the lmbench results here when run bare metal on POWER6. 1st column is the unpatch results. 2nd column is the results using the below patch and the 3rd is the % diff of these results from the base. 4th and 5th columns are the results and % differnce from the base using the older patch (SPURR read in syscall entry/exit path). Base Scaled-Acct SPURR-in-syscall Result Result % diff Result % diff Simple syscall: 0.3086 0.3086 0.0000 0.3452 11.8600 Simple read: 0.4591 0.4671 1.7425 0.5044 9.86713 Simple write: 0.4364 0.4366 0.0458 0.4731 8.40971 Simple stat: 2.0055 2.0295 1.1967 2.0669 3.06158 Simple fstat: 0.5962 0.5876 -1.442 0.6368 6.80979 Simple open/close: 3.1283 3.1009 -0.875 3.2088 2.57328 Select on 10 fd's: 0.8554 0.8457 -1.133 0.8667 1.32101 Select on 100 fd's: 3.5292 3.6329 2.9383 3.6664 3.88756 Select on 250 fd's: 7.9097 8.1881 3.5197 8.2242 3.97613 Select on 500 fd's: 15.2659 15.836 3.7357 15.873 3.97814 Select on 10 tcp fd's: 0.9576 0.9416 -1.670 0.9752 1.83792 Select on 100 tcp fd's: 7.248 7.2254 -0.311 7.2685 0.28283 Select on 250 tcp fd's: 17.7742 17.707 -0.375 17.749 -0.1406 Select on 500 tcp fd's: 35.4258 35.25 -0.496 35.286 -0.3929 Signal handler installation: 0.6131 0.6075 -0.913 0.647 5.52927 Signal handler overhead: 2.0919 2.1078 0.7600 2.1831 4.35967 Protection fault: 0.7345 0.7478 1.8107 0.8031 9.33968 Pipe latency: 33.006 16.398 -50.31 33.475 1.42368 AF_UNIX sock stream latency: 14.5093 30.910 113.03 30.715 111.692 Process fork+exit: 219.8 222.8 1.3648 229.37 4.35623 Process fork+execve: 876.14 873.28 -0.32 868.66 -0.8533 Process fork+/bin/sh -c: 2830 2876.5 1.6431 2958 4.52296 File /var/tmp/XXX write bw: 1193497 1195536 0.1708 118657 -0.5799 Pagefaults on /var/tmp/XXX: 3.1272 3.2117 2.7020 3.2521 3.99398 Also, kernel compile times show no difference with this patch applied. [pbadari@us.ibm.com: Avoid unnecessary PURR reading] Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Jay Lan <jlan@engr.sgi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Add missing newlines to some uses of dev_<level> messagesJoe Perches2007-10-181-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Found these while looking at printk uses. Add missing newlines to dev_<level> uses Add missing KERN_<level> prefixes to multiline dev_<level>s Fixed a wierd->weird spelling typo Added a newline to a printk Signed-off-by: Joe Perches <joe@perches.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Mark M. Hoffman <mhoffman@lightlink.com> Cc: Roland Dreier <rolandd@cisco.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Greg KH <greg@kroah.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: James Smart <James.Smart@Emulex.Com> Cc: Andrew Vasquez <andrew.vasquez@qlogic.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | sysctl: x86_64 remove unnecessary binary pathsEric W. Biederman2007-10-182-10/+1
| | | | | | | | | | | | | | | | Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Alexey Dobriyan <adobriyan@sw.ru> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | cpu hotplug: intel_cacheinfo: fix cpu hotplug error handlingAkinobu Mita2007-10-181-21/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Fix resource leakage in error case within detect_cache_attributes() - Don't register hotcpu notifier when cache_add_dev() returns error - Introduce cache_dev_map cpumask to track whether cache interface for CPU is successfully added by cache_add_dev() or not. cache_add_dev() may fail with out of memory error. In order to avoid cache_remove_dev() with that uninitialized cache interface when CPU_DEAD event is delivered we need to have the cache_dev_map cpumask. (We cannot change cache_add_dev() from CPU_ONLINE event handler to CPU_UP_PREPARE event handler. Because cache_add_dev() needs to do cpuid and store the results with its CPU online.) [nix.or.die@googlemail.com: fix a section mismatch warning] Cc: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Andi Kleen <ak@suse.de> Cc: Jan Beulich <jbeulich@novell.com> Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | cpu hotplug: mce: fix cpu hotplug error handlingAkinobu Mita2007-10-181-10/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Clear kobject in percpu device_mce before calling sysdev_register() with Because mce_create_device() may fail and it leaves kobject filled with junk. It will be the problem when mce_create_device() will be called next time. - Fix error handling in mce_create_device() Error handling should not do sysdev_remove_file() with not yet added attributes. - Don't register hotcpu notifier when mce_create_device() returns error - Do mce_create_device() in CPU_UP_PREPARE instead of CPU_ONLINE Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Andi Kleen <ak@suse.de> Cc: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | cpu hotplug: msr: fix cpu hotplug error handlingAkinobu Mita2007-10-181-15/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | Do msr_device_create() in CPU_UP_PREPARE instead of CPU_ONLINE. Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Andi Kleen <ak@suse.de> Cc: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | cpu hotplug: thermal_throttle: fix cpu hotplug error handlingAkinobu Mita2007-10-181-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | Do thermal_throttle_add_dev() in CPU_UP_PREPARE instead of CPU_ONLINE. Cc: Dmitriy Zavin <dmitriyz@google.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Andi Kleen <ak@suse.de> Cc: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Fix discrepancy between VDSO based gettimeofday() and sys_gettimeofday().Tony Breeds2007-10-182-1/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On platforms that copy sys_tz into the vdso (currently only x86_64, soon to include powerpc), it is possible for the vdso to get out of sync if a user calls (admittedly unusual) settimeofday(NULL, ptr). This patch adds a hook for architectures that set CONFIG_GENERIC_TIME_VSYSCALL to ensure when sys_tz is updated they can also updatee their copy in the vdso. Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Cc: Andi Kleen <ak@suse.de> Cc: Tony Luck <tony.luck@intel.com> Acked-by: John Stultz <johnstul@us.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Hibernation: Use temporary page tables for kernel text mapping on x86_64Rafael J. Wysocki2007-10-181-6/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use temporary page tables for the kernel text mapping during hibernation restore on x86_64. Without the patch, the original boot kernel's page tables that represent the kernel text mapping are used while the core of the image kernel is being restored. However, in principle, if the boot kernel is not identical to the image kernel, the location of these page tables in the image kernel need not be the same, so we should create a safe copy of the kernel text mapping prior to restoring the core of the image kernel. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Hibernation: Pass CR3 in the image header on x86_64Rafael J. Wysocki2007-10-182-7/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | Since we already pass the address of restore_registers() in the image header, we can also pass the value of the CR3 register from before the hibernation in the same way. This will allow us to avoid using init_level4_pgt page tables during the restore. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Hibernation: Arbitrary boot kernel support on x86_64Rafael J. Wysocki2007-10-183-8/+92
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make it possible to restore a hibernation image on x86_64 with the help of a kernel different from the one in the image. The idea is to split the core restoration code into two separate parts and to place each of them in a different page.  The first part belongs to the boot kernel and is executed as the last step of the image kernel's memory restoration procedure.  Before being executed, it is relocated to a safe page that won't be overwritten while copying the image kernel pages. The final operation performed by it is a jump to the second part of the core restoration code that belongs to the image kernel and has just been restored. This code makes the CPU switch to the image kernel's page tables and restores the state of general purpose registers (including the stack pointer) from before the hibernation. The main issue with this idea is that in order to jump to the second part of the core restoration code the boot kernel needs to know its address.  However, this address may be passed to it in the image header.  Namely, the part of the image header previously used for checking if the version of the image kernel is correct can be replaced with some architecture specific data that will allow the boot kernel to jump to the right address within the image kernel.  These data should also be used for checking if the image kernel is compatible with the boot kernel (as far as the memory restroration procedure is concerned). It can be done, for example, with the help of a "magic" value that has to be equal in both kernels, so that they can be regarded as compatible. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | s2ram: kill old debugging junkPavel Machek2007-10-182-43/+1
| | | | | | | | | | | | | | | | | | | | | | | | This removes old debugging stuff, that should be no longer neccessary. It accessed VGA hardware (which may not be ready at this point), and used LEDs at port 80 for debugging. Signed-off-by: Pavel Machek <pavel@suse.cz> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | serial: turn serial console suspend a boot rather than compile time optionAndres Salomon2007-10-181-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, there's a CONFIG_DISABLE_CONSOLE_SUSPEND that allows one to stop the serial console from being suspended when the rest of the machine goes to sleep. This is incredibly useful for debugging power management-related things; however, having it as a compile-time option has proved to be incredibly inconvenient for us (OLPC). There are plenty of times that we want serial console to not suspend, but for the most part we'd like serial console to be suspended. This drops CONFIG_DISABLE_CONSOLE_SUSPEND, and replaces it with a kernel boot parameter (no_console_suspend). By default, the serial console will be suspended along with the rest of the system; by passing 'no_console_suspend' to the kernel during boot, serial console will remain alive during suspend. For now, this is pretty serial console specific; further fixes could be applied to make this work for things like netconsole. Signed-off-by: Andres Salomon <dilinger@debian.org> Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Nigel Cunningham <nigel@suspend2.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | PM: Rework struct platform_suspend_opsRafael J. Wysocki2007-10-185-101/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no reason why the .prepare() and .finish() methods in 'struct platform_suspend_ops' should take any arguments, since architectures don't use these methods' argument in any practically meaningful way (ie. either the target system sleep state is conveyed to the platform by .set_target(), or there is only one suspend state supported and it is indicated to the PM core by .valid(), or .prepare() and .finish() aren't defined at all).  There also is no reason why .finish() should return any result. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | PM: Rename struct pm_ops and related thingsRafael J. Wysocki2007-10-1812-30/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The name of 'struct pm_ops' suggests that it is related to the power management in general, but in fact it is only related to suspend.  Moreover, its name should indicate what this structure is used for, so it seems reasonable to change it to 'struct platform_suspend_ops'.  In that case, the name of the global variable of this type used by the PM core and the names of related functions should be changed accordingly. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | PM: Move definition of struct pm_ops to suspend.hRafael J. Wysocki2007-10-189-17/+9
|/ | | | | | | | | | | | | | | | | | | | | | Move the definition of 'struct pm_ops' and related functions from <linux/pm.h> to <linux/suspend.h> . There are, at least, the following reasons to do that: * 'struct pm_ops' is specifically related to suspend and not to the power management in general. * As long as 'struct pm_ops' is defined in <linux/pm.h>, any modification of it causes the entire kernel to be recompiled, which is unnecessary and annoying. * Some suspend-related features are already defined in <linux/suspend.h>, so it is logical to move the definition of 'struct pm_ops' into there. * 'struct hibernation_ops', being the hibernation-related counterpart of 'struct pm_ops', is defined in <linux/suspend.h> . Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [IA64] fix non-numa buildAndrew Morton2007-10-171-1/+3
| | | | | | | | | | | | | | | | arch/ia64/kernel/machine_kexec.c: In function `arch_crash_save_vmcoreinfo': arch/ia64/kernel/machine_kexec.c:131: error: `pgdat_list' undeclared (first use in this function) arch/ia64/kernel/machine_kexec.c:131: error: (Each undeclared identifier is reported only once arch/ia64/kernel/machine_kexec.c:131: error: for each function it appears in.) arch/ia64/kernel/machine_kexec.c:134: error: `node_memblk' undeclared (first use in this function) arch/ia64/kernel/machine_kexec.c:135: error: `NR_NODE_MEMBLKS' undeclared (first use in this function) arch/ia64/kernel/machine_kexec.c:136: error: invalid application of `sizeof' to incomplete type `node_memblk_s' arch/ia64/kernel/machine_kexec.c:137: error: dereferencing pointer to incomplete type arch/ia64/kernel/machine_kexec.c:138: error: dereferencing pointer to incomplete type make[1]: *** [arch/ia64/kernel/machine_kexec.o] Error 1 Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
* Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-x86Linus Torvalds2007-10-1786-355/+541
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-x86: (114 commits) x86: delete vsyscall files during make clean kbuild: fix typo SRCARCH in find_sources x86: fix kernel rebuild due to vsyscall fallout .gitignore update for x86 arch x86: unify include/asm/debugreg_32/64.h x86: unify include/asm/unwind_32/64.h x86: unify include/asm/types_32/64.h x86: unify include/asm/tlb_32/64.h x86: unify include/asm/siginfo_32/64.h x86: unify include/asm/bug_32/64.h x86: unify include/asm/mman_32/64.h x86: unify include/asm/agp_32/64.h x86: unify include/asm/kdebug_32/64.h x86: unify include/asm/ioctls_32/64.h x86: unify include/asm/floppy_32/64.h x86: apply missing DMA/OOM prevention to floppy_32.h x86: unify include/asm/cache_32/64.h x86: unify include/asm/cache_32/64.h x86: unify include/asm/dmi_32/64.h x86: unify include/asm/delay_32/64.h ...
| * x86: delete vsyscall files during make cleanSam Ravnborg2007-10-171-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | make clean failed to delete a few files in x86/kernel. This is because kbuild does not see the correct/full kernel/Makefile. As a workaround until the Makefiles are merged specify the files to be deleted in the common Makefile. Reported by Mike Galbraith <efault@gmx.de> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Mike Galbraith <efault@gmx.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * x86: fix kernel rebuild due to vsyscall falloutSam Ravnborg2007-10-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Fix rebuild of kernel when there is no changes. This happened for i386. Using make V=2 hinted that the output files were not assigned to targets - fixed by this patch. Reported by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * .gitignore update for x86 archDenis V. Lunev2007-10-172-0/+2
| | | | | | | | | | | | | | | | | | This patch: - makes .gitignore files visible to git - makes arch/x86/kernel/vsyscall_32.lds and arch/i386/boot invisible Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * x86: vdso linker script cleanupRoland McGrath2007-10-171-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I can't see the reason ". = VDSO_PRELINK + 0x900;" was ever there in the linker script for the x86_64 vDSO. I can't find anything that depends on this magic offset, or that should care at all about the particular location of of the .data section (all from vvar.c) in the vDSO image. If it is really desireable to place .data at 0x900, then it should be after all the other sections so they fill in the space up to 0x900. This removes the 0x900 magic and cleans up the output sections generally in the vDSO linker script. This saves a few hundred bytes in the size of the vDSO file, bringing it back well under 4kb total so that its vma only needs one page. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * x86: convert mm_context_t semaphore to a mutexLuiz Fernando N. Capitulino2007-10-174-11/+12
| | | | | | | | | | | | | | | | | | | | convert mm_context_t semaphore to a mutex. Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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