- 04 10月, 2010 11 次提交
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由 Thomas Gleixner 提交于
Wrap the old chip function enable() until the migration is complete and the old chip functions are removed. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121842.437159182@linutronix.de> Reviewed-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
Wrap the old chip function eoi() until the migration is complete and the old chip functions are removed. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121842.339657617@linutronix.de> Reviewed-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
Wrap the old chip function mask_ack() until the migration is complete and the old chip functions are removed. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121842.240806983@linutronix.de> Reviewed-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
Wrap the old chip function ack() until the migration is complete and the old chip functions are removed. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121842.142624725@linutronix.de> Reviewed-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
Wrap the old chip function unmask() until the migration is complete and the old chip functions are removed. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121842.043608928@linutronix.de> Reviewed-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
Wrap the old chip function mask() until the migration is complete and the old chip functions are removed. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121841.940355859@linutronix.de> Reviewed-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
Wrap the old chip functions for bus_lock/bus_sync_unlock until the migration is complete and the old chip functions are removed. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121841.842536121@linutronix.de> Reviewed-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
The compat functions go away when the core code is converted. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
Convert all references in the core code to orq, chip, handler_data, chip_data, msi_desc, affinity to irq_data.* Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
Low level chip functions need access to irq_desc->handler_data, irq_desc->chip_data and irq_desc->msi_desc. We hand down the irq number to the low level functions, so they need to lookup irq_desc. With sparse irq this means a radix tree lookup. We could hand down irq_desc itself, but low level chip functions have no need to fiddle with it directly and we want to restrict access to irq_desc further. Preparatory patch for new chip functions. Note, that the ugly anon union/struct is there to avoid a full tree wide clean up for now. This is not going to last 3 years like __do_IRQ() Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121841.645542300@linutronix.de> Reviewed-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Gleixner 提交于
The generic irq Kconfig options are copied around all archs. Provide a generic Kconfig file which can be included. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121843.217333624@linutronix.de> Reviewed-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NIngo Molnar <mingo@elte.hu>
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- 24 9月, 2010 1 次提交
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由 Thomas Gleixner 提交于
3 years transition phase is enough. Cleanup the last users and remove the cruft. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Leo Chen <leochen@broadcom.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Chris Zankel <chris@zankel.net>
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- 15 9月, 2010 1 次提交
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由 H. Peter Anvin 提交于
compat_alloc_user_space() expects the caller to independently call access_ok() to verify the returned area. A missing call could introduce problems on some architectures. This patch incorporates the access_ok() check into compat_alloc_user_space() and also adds a sanity check on the length. The existing compat_alloc_user_space() implementations are renamed arch_compat_alloc_user_space() and are used as part of the implementation of the new global function. This patch assumes NULL will cause __get_user()/__put_user() to either fail or access userspace on all architectures. This should be followed by checking the return value of compat_access_user_space() for NULL in the callers, at which time the access_ok() in the callers can also be removed. Reported-by: NBen Hawkes <hawkes@sota.gen.nz> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: NChris Metcalf <cmetcalf@tilera.com> Acked-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NIngo Molnar <mingo@elte.hu> Acked-by: NThomas Gleixner <tglx@linutronix.de> Acked-by: NTony Luck <tony.luck@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: James Bottomley <jejb@parisc-linux.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: <stable@kernel.org>
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- 14 9月, 2010 1 次提交
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由 Ingo Molnar 提交于
Mathieu reported bad latencies with make -j10 kind of kbuild workloads - which is mostly caused by us scheduling with a too coarse granularity. Reduce the minimum granularity some more, to make sure we can meet the latency target. I got the following results (make -j10 kbuild load, average of 3 runs): vanilla: maximum latency: 38278.9 µs average latency: 7730.1 µs patched: maximum latency: 22702.1 µs average latency: 6684.8 µs Mathieu also measured it: | | * wakeup-latency.c (SIGEV_THREAD) with make -j10 | | - Mainline 2.6.35.2 kernel | | maximum latency: 45762.1 µs | average latency: 7348.6 µs | | - With only Peter's smaller min_gran (shown below): | | maximum latency: 29100.6 µs | average latency: 6684.1 µs | Reported-by: NMathieu Desnoyers <mathieu.desnoyers@efficios.com> Reported-by: NLinus Torvalds <torvalds@linux-foundation.org> Acked-by: NMathieu Desnoyers <mathieu.desnoyers@efficios.com> Suggested-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <AANLkTi=8m4g01wZPacySoF7U0PevTNVgJoZZrHiUD-pN@mail.gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 13 9月, 2010 1 次提交
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由 Tejun Heo 提交于
Update copyright notice and add Documentation/workqueue.txt. Randy Dunlap, Dave Chinner: misc fixes. Signed-off-by: NTejun Heo <tj@kernel.org> Reviewed-By: NFlorian Mickler <florian@mickler.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Dave Chinner <david@fromorbit.com>
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- 12 9月, 2010 1 次提交
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由 Rafael J. Wysocki 提交于
There is a problem in hibernate_preallocate_memory() that it calls preallocate_image_memory() with an argument that may be greater than the total number of available non-highmem memory pages. If that's the case, the OOM condition is guaranteed to trigger, which in turn can cause significant slowdown to occur during hibernation. To avoid that, make preallocate_image_memory() adjust its argument before calling preallocate_image_pages(), so that the total number of saveable non-highem pages left is not less than the minimum size of a hibernation image. Change hibernate_preallocate_memory() to try to allocate from highmem if the number of pages allocated by preallocate_image_memory() is too low. Modify free_unnecessary_pages() to take all possible memory allocation patterns into account. Reported-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl> Tested-by: NM. Vefa Bicakci <bicave@superonline.com>
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- 11 9月, 2010 1 次提交
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由 mark gross 提交于
Correct some pr_debug() misuse and add a stronger parameter check to pm_qos_write() for the ASCII hex value case. Thanks to Dan Carpenter for pointing out the problem! Signed-off-by: Nmark gross <markgross@thegnar.org> Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
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- 10 9月, 2010 8 次提交
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由 Chris Wright 提交于
Be sure to avoid entering t_show() with FTRACE_ITER_HASH set without having properly started the iterator to iterate the hash. This case is degenerate and, as discovered by Robert Swiecki, can cause t_hash_show() to misuse a pointer. This causes a NULL ptr deref with possible security implications. Tracked as CVE-2010-3079. Cc: Robert Swiecki <swiecki@google.com> Cc: Eugene Teo <eugene@redhat.com> Cc: <stable@kernel.org> Signed-off-by: NChris Wright <chrisw@sous-sol.org> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Hugh Dickins 提交于
Please revert 2.6.36-rc commit d2997b10 "hibernation: freeze swap at hibernation". It complicated matters by adding a second swap allocation path, just for hibernation; without in any way fixing the issue that it was intended to address - page reclaim after fixing the hibernation image might free swap from a page already imaged as swapcache, letting its swap be reallocated to store a different page of the image: resulting in data corruption if the imaged page were freed as clean then swapped back in. Pages freed to si->swap_map were still in danger of being reallocated by the alternative allocation path. I guess it inadvertently fixed slow SSD swap allocation for hibernation, as reported by Nigel Cunningham: by missing out the discards that occur on the usual swap allocation path; but that was unintentional, and needs a separate fix. Signed-off-by: NHugh Dickins <hughd@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Ondrej Zary <linux@rainbow-software.org> Cc: Andrea Gelmini <andrea.gelmini@gmail.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Nigel Cunningham <nigel@tuxonice.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Jerome Marchand 提交于
gid_t is a unsigned int. If group_info contains a gid greater than MAX_INT, groups_search() function may look on the wrong side of the search tree. This solves some unfair "permission denied" problems. Signed-off-by: NJerome Marchand <jmarchan@redhat.com> Cc: <stable@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Michael S. Tsirkin 提交于
Add cgroup_attach_task_all() The existing cgroup_attach_task_current_cg() API is called by a thread to attach another thread to all of its cgroups; this is unsuitable for cases where a privileged task wants to attach itself to the cgroups of a less privileged one, since the call must be made from the context of the target task. This patch adds a more generic cgroup_attach_task_all() API that allows both the source task and to-be-moved task to be specified. cgroup_attach_task_current_cg() becomes a specialization of the more generic new function. [menage@google.com: rewrote changelog] [akpm@linux-foundation.org: address reviewer comments] Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Tested-by: NAlex Williamson <alex.williamson@redhat.com> Acked-by: NPaul Menage <menage@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Ben Blum <bblum@google.com> Cc: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Peter Oberparleiter 提交于
The gcov-kernel infrastructure expects that each object file is loaded only once. This may not be true, e.g. when loading multiple kernel modules which are linked to the same object file. As a result, loading such kernel modules will result in incorrect gcov results while unloading will cause a null-pointer dereference. This patch fixes these problems by changing the gcov-kernel infrastructure so that multiple profiling data sets can be associated with one debugfs entry. It applies to 2.6.36-rc1. Signed-off-by: NPeter Oberparleiter <oberpar@linux.vnet.ibm.com> Reported-by: NWerner Spies <werner.spies@thalesgroup.com> Cc: <stable@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Suresh Siddha 提交于
Currently sched_avg_update() (which updates rt_avg stats in the rq) is getting called from scale_rt_power() (in the load balance context) which doesn't take rq->lock. Fix it by moving the sched_avg_update() to more appropriate update_cpu_load() where the CFS load gets updated as well. Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1282596171.2694.3.camel@sbsiddha-MOBL3> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
Since we have UP_PREPARE, we should also have UP_CANCELED. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> LKML-Reference: <new-submission> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Li Zefan 提交于
Commit 1c024eca (perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track events) caused a module refcount leak. Reported-And-Tested-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4C7E1F12.8030304@cn.fujitsu.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 08 9月, 2010 3 次提交
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由 Masami Hiramatsu 提交于
Check the argument name whether it is invalid (not C-like symbol name). This makes event format simple. Reported-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> LKML-Reference: <20100827113912.22882.62313.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Masami Hiramatsu 提交于
Set "argN" name for each argument automatically if it has no specified name. Since dynamic trace event(kprobe_events) accepts special characters for its argument, its format can show those special characters (e.g. '$', '%', '+'). However, perf can't parse those format because of the character (especially '%') mess up the format. This sets "argX" name for those arguments if user omitted the argument names. E.g. # echo 'p do_fork %ax IP=%ip $stack' > tracing/kprobe_events # cat tracing/kprobe_events p:kprobes/p_do_fork_0 do_fork arg1=%ax IP=%ip arg3=$stack Reported-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> LKML-Reference: <20100827113906.22882.59312.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Masami Hiramatsu 提交于
Fix a memory leak which happens when a field name conflicts with others. In error case, free_trace_probe() will free all arguments until nr_args, so this increments nr_args the begining of the loop instead of the end. Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> LKML-Reference: <20100827113846.22882.12670.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 09 9月, 2010 1 次提交
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由 Steven Rostedt 提交于
Reading the file set_ftrace_filter does three things. 1) shows whether or not filters are set for the function tracer 2) shows what functions are set for the function tracer 3) shows what triggers are set on any functions 3 is independent from 1 and 2. The way this file currently works is that it is a state machine, and as you read it, it may change state. But this assumption breaks when you use lseek() on the file. The state machine gets out of sync and the t_show() may use the wrong pointer and cause a kernel oops. Luckily, this will only kill the app that does the lseek, but the app dies while holding a mutex. This prevents anyone else from using the set_ftrace_filter file (or any other function tracing file for that matter). A real fix for this is to rewrite the code, but that is too much for a -rc release or stable. This patch simply disables llseek on the set_ftrace_filter() file for now, and we can do the proper fix for the next major release. Reported-by: NRobert Swiecki <swiecki@google.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Tavis Ormandy <taviso@google.com> Cc: Eugene Teo <eugene@redhat.com> Cc: vendor-sec@lst.de Cc: <stable@kernel.org> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 05 9月, 2010 2 次提交
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由 Michael S. Tsirkin 提交于
cgroup_attach_task_current_cg API that have upstream is backwards: we really need an API to attach to the cgroups from another process A to the current one. In our case (vhost), a priveledged user wants to attach it's task to cgroups from a less priveledged one, the API makes us run it in the other task's context, and this fails. So let's make the API generic and just pass in 'from' and 'to' tasks. Add an inline wrapper for cgroup_attach_task_current_cg to avoid breaking bisect. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Acked-by: NLi Zefan <lizf@cn.fujitsu.com> Acked-by: NPaul Menage <menage@google.com>
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由 Andi Kleen 提交于
No real bugs I believe, just some dead code. Signed-off-by: NAndi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: andi@firstfloor.org Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 03 9月, 2010 1 次提交
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由 Randy Dunlap 提交于
Fix kernel-doc notation in linux/mutex.h and kernel/mutex.c, then add these 2 files to the kernel-locking docbook as the Mutex API reference chapter. Add one API function to mutex-design.txt and correct a typo in that file. Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com> Cc: Rusty Russell <rusty@rustcorp.com.au> LKML-Reference: <20100902154816.6cc2f9ad.randy.dunlap@oracle.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 01 9月, 2010 3 次提交
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由 Don Zickus 提交于
During my rewrite, the semantics of touch_nmi_watchdog and touch_softlockup_watchdog changed enough to break some drivers (mostly over preemptable regions). These are cases where long delays on one CPU (due to print_delay for example) can cause long delays on other CPUs - so we must 'touch' the nmi_watchdog flag of those other CPUs as well. This change brings those touch_*_watchdog() functions back in line with to how they used to work. Signed-off-by: NDon Zickus <dzickus@redhat.com> Acked-by: NCyrill Gorcunov <gorcunov@openvz.org> Cc: peterz@infradead.org Cc: fweisbec@gmail.com LKML-Reference: <1283310009-22168-2-git-send-email-dzickus@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Paul E. McKenney 提交于
[ 23.584719] [ 23.584720] =================================================== [ 23.585059] [ INFO: suspicious rcu_dereference_check() usage. ] [ 23.585176] --------------------------------------------------- [ 23.585176] kernel/pid.c:419 invoked rcu_dereference_check() without protection! [ 23.585176] [ 23.585176] other info that might help us debug this: [ 23.585176] [ 23.585176] [ 23.585176] rcu_scheduler_active = 1, debug_locks = 1 [ 23.585176] 1 lock held by rc.sysinit/728: [ 23.585176] #0: (tasklist_lock){.+.+..}, at: [<ffffffff8104771f>] sys_setpgid+0x5f/0x193 [ 23.585176] [ 23.585176] stack backtrace: [ 23.585176] Pid: 728, comm: rc.sysinit Not tainted 2.6.36-rc2 #2 [ 23.585176] Call Trace: [ 23.585176] [<ffffffff8105b436>] lockdep_rcu_dereference+0x99/0xa2 [ 23.585176] [<ffffffff8104c324>] find_task_by_pid_ns+0x50/0x6a [ 23.585176] [<ffffffff8104c35b>] find_task_by_vpid+0x1d/0x1f [ 23.585176] [<ffffffff81047727>] sys_setpgid+0x67/0x193 [ 23.585176] [<ffffffff810029eb>] system_call_fastpath+0x16/0x1b [ 24.959669] type=1400 audit(1282938522.956:4): avc: denied { module_request } for pid=766 comm="hwclock" kmod="char-major-10-135" scontext=system_u:system_r:hwclock_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclas It turns out that the setpgid() system call fails to enter an RCU read-side critical section before doing a PID-to-task_struct translation. This commit therefore does rcu_read_lock() before the translation, and also does rcu_read_unlock() after the last use of the returned pointer. Reported-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: NDavid Howells <dhowells@redhat.com>
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由 Li Zefan 提交于
While we are reading trace_stat/functionX and someone just disabled function_profile at that time, we can trigger this: divide error: 0000 [#1] PREEMPT SMP ... EIP is at function_stat_show+0x90/0x230 ... This fix just takes the ftrace_profile_lock and checks if rec->counter is 0. If it's 0, we know the profile buffer has been reset. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Cc: stable@kernel.org LKML-Reference: <4C723644.4040708@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 31 8月, 2010 2 次提交
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由 Tejun Heo 提交于
alloc_mayday_mask() was using alloc_cpumask_var() making gcwq->mayday_mask contain garbage after initialization on CONFIG_CPUMASK_OFFSTACK=y configurations. This combined with the previously fixed GCWQ_DISASSOCIATED initialization bug could make rescuers fall into infinite loop trying to bind to an offline cpu. Signed-off-by: NTejun Heo <tj@kernel.org> Reported-by: NCAI Qian <caiqian@redhat.com>
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由 Tejun Heo 提交于
init_workqueues() incorrectly marks workqueues for all possible CPUs associated. Combined with mayday_mask initialization bug, this can make rescuers keep trying to bind to an offline gcwq indefinitely. Fix init_workqueues() such that only online CPUs have their gcwqs have GCWQ_DISASSOCIATED cleared. Signed-off-by: NTejun Heo <tj@kernel.org> Reported-by: NCAI Qian <caiqian@redhat.com>
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- 30 8月, 2010 1 次提交
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由 Stephane Eranian 提交于
Per-thread events with a cpu filter, i.e., cpu != -1, were not reporting correct timings when the thread never ran on the monitored cpu. The time enabled was reported as a negative value. This patch fixes the problem by updating tstamp_stopped, tstamp_running in event_sched_out() for events with filters and which are marked as INACTIVE. The function group_sched_out() is modified to systematically call into event_sched_out() to avoid duplicating the timing adjustment code twice. With the patch, I now get: $ task_cpu -i -e unhalted_core_cycles,unhalted_core_cycles noploop 2 noploop for 2 seconds CPU0 0 unhalted_core_cycles (ena=1,991,136,594, run=0) CPU0 0 unhalted_core_cycles (ena=1,991,136,594, run=0) CPU1 0 unhalted_core_cycles (ena=1,991,136,594, run=0) CPU1 0 unhalted_core_cycles (ena=1,991,136,594, run=0) CPU2 0 unhalted_core_cycles (ena=1,991,136,594, run=0) CPU2 0 unhalted_core_cycles (ena=1,991,136,594, run=0) CPU3 4,747,990,931 unhalted_core_cycles (ena=1,991,136,594, run=1,991,136,594) CPU3 4,747,990,931 unhalted_core_cycles (ena=1,991,136,594, run=1,991,136,594) Signed-off-by: NStephane Eranian <eranian@gmail.com> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus@samba.org Cc: davem@davemloft.net Cc: fweisbec@gmail.com Cc: perfmon2-devel@lists.sf.net Cc: eranian@google.com LKML-Reference: <4c76802d.aae9d80a.115d.70fe@mx.google.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 27 8月, 2010 1 次提交
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由 Saravana Kannan 提交于
Fix the pm_qos_add_request() kerneldoc comment that doesn't reflect the behavior of the function after the last PM QoS update. Signed-off-by: NSaravana Kannan <skannan@codeaurora.org> Acked-by: Nmark gross <markgross@thegnar.org> Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
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- 25 8月, 2010 1 次提交
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由 Anton Blanchard 提交于
save_stack_trace() stores the instruction pointer, not the function descriptor. On ppc64 the trace stack code currently dereferences the instruction pointer and shows 8 bytes of instructions in our backtraces: # cat /sys/kernel/debug/tracing/stack_trace Depth Size Location (26 entries) ----- ---- -------- 0) 5424 112 0x6000000048000004 1) 5312 160 0x60000000ebad01b0 2) 5152 160 0x2c23000041c20030 3) 4992 240 0x600000007c781b79 4) 4752 160 0xe84100284800000c 5) 4592 192 0x600000002fa30000 6) 4400 256 0x7f1800347b7407e0 7) 4144 208 0xe89f0108f87f0070 8) 3936 272 0xe84100282fa30000 Since we aren't dealing with function descriptors, use %pS instead of %pF to fix it: # cat /sys/kernel/debug/tracing/stack_trace Depth Size Location (26 entries) ----- ---- -------- 0) 5424 112 ftrace_call+0x4/0x8 1) 5312 160 .current_io_context+0x28/0x74 2) 5152 160 .get_io_context+0x48/0xa0 3) 4992 240 .cfq_set_request+0x94/0x4c4 4) 4752 160 .elv_set_request+0x60/0x84 5) 4592 192 .get_request+0x2d4/0x468 6) 4400 256 .get_request_wait+0x7c/0x258 7) 4144 208 .__make_request+0x49c/0x610 8) 3936 272 .generic_make_request+0x390/0x434 Signed-off-by: NAnton Blanchard <anton@samba.org> Cc: rostedt@goodmis.org Cc: fweisbec@gmail.com LKML-Reference: <20100825013238.GE28360@kryten> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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