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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-12-02 10:13:09 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-12-02 10:13:09 -0800 |
| commit | e321ae4c207ce4c6c6812fc65e666efc325cc65e (patch) | |
| tree | 117ded7f1a1bfcdcc6417c6816c02680539d6485 /arch/x86 | |
| parent | bcc2f9b718d0be9cd77551d37c28daf4ebbc570c (diff) | |
| parent | e98a6e59dff885eb387163b1a7abe019a44ba90b (diff) | |
| download | linux-e321ae4c207ce4c6c6812fc65e666efc325cc65e.tar.gz | |
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar: "Misc kernel and tooling fixes" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tools lib traceevent: Fix conversion of pointer to integer of different size perf/trace: Properly use u64 to hold event_id perf: Remove fragile swevent hlist optimization ftrace, perf: Avoid infinite event generation loop tools lib traceevent: Fix use of multiple options in processing field perf header: Fix possible memory leaks in process_group_desc() perf header: Fix bogus group name perf tools: Tag thread comm as overriden
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/trace/irq_vectors.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/include/asm/trace/irq_vectors.h b/arch/x86/include/asm/trace/irq_vectors.h index 2874df24e7a4..4cab890007a7 100644 --- a/arch/x86/include/asm/trace/irq_vectors.h +++ b/arch/x86/include/asm/trace/irq_vectors.h @@ -72,6 +72,17 @@ DEFINE_IRQ_VECTOR_EVENT(x86_platform_ipi); DEFINE_IRQ_VECTOR_EVENT(irq_work); /* + * We must dis-allow sampling irq_work_exit() because perf event sampling + * itself can cause irq_work, which would lead to an infinite loop; + * + * 1) irq_work_exit happens + * 2) generates perf sample + * 3) generates irq_work + * 4) goto 1 + */ +TRACE_EVENT_PERF_PERM(irq_work_exit, is_sampling_event(p_event) ? -EPERM : 0); + +/* * call_function - called when entering/exiting a call function interrupt * vector handler */ |