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* [tip:perf/core] perf/x86: Fix USER/KERNEL tagging of samples
@ 2012-07-06  6:20 tip-bot for Peter Zijlstra
  2012-07-06 16:29 ` Linus Torvalds
  0 siblings, 1 reply; 22+ messages in thread
From: tip-bot for Peter Zijlstra @ 2012-07-06  6:20 UTC (permalink / raw)
  To: linux-tip-commits
  Cc: linux-kernel, eranian, hpa, mingo, torvalds, a.p.zijlstra,
	fweisbec, akpm, tglx

Commit-ID:  ce5c1fe9a9e059b5c58f0a7e2a3e687d0efac815
Gitweb:     http://git.kernel.org/tip/ce5c1fe9a9e059b5c58f0a7e2a3e687d0efac815
Author:     Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Wed, 20 Jun 2012 11:11:38 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 5 Jul 2012 20:59:07 +0200

perf/x86: Fix USER/KERNEL tagging of samples

Several perf interrupt handlers (PEBS,IBS,BTS) re-write regs->ip but
do not update the segment registers. So use an regs->ip based test
instead of an regs->cs/regs->flags based test.

Reported-and-tested-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-xxrt0a1zronm1sm36obwc2vy@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/cpu/perf_event.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index c4706cf..6ef9d41 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1863,7 +1863,7 @@ unsigned long perf_misc_flags(struct pt_regs *regs)
 		else
 			misc |= PERF_RECORD_MISC_GUEST_KERNEL;
 	} else {
-		if (user_mode(regs))
+		if (!kernel_ip(regs->ip))
 			misc |= PERF_RECORD_MISC_USER;
 		else
 			misc |= PERF_RECORD_MISC_KERNEL;

^ permalink raw reply	[flat|nested] 22+ messages in thread

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Thread overview: 22+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-07-06  6:20 [tip:perf/core] perf/x86: Fix USER/KERNEL tagging of samples tip-bot for Peter Zijlstra
2012-07-06 16:29 ` Linus Torvalds
2012-07-06 18:12   ` Peter Zijlstra
2012-07-06 18:16     ` Linus Torvalds
2012-07-06 18:34       ` Linus Torvalds
2012-07-06 20:48         ` Peter Zijlstra
2012-07-06 20:59           ` Linus Torvalds
2012-07-09 11:23         ` Peter Zijlstra
2012-07-09 17:55           ` Linus Torvalds
2012-07-10  9:02             ` Peter Zijlstra
2012-07-10  9:48               ` Ingo Molnar
2012-07-10  9:50               ` Peter Zijlstra
2012-07-10  9:52                 ` Peter Zijlstra
2012-07-10  9:55                 ` Ingo Molnar
2012-07-31 17:57               ` [tip:perf/urgent] perf/x86: Fix USER/ KERNEL tagging of samples properly tip-bot for Peter Zijlstra
2012-07-09 18:41           ` [tip:perf/core] perf/x86: Fix USER/KERNEL tagging of samples Ingo Molnar
2012-07-10  7:54             ` Peter Zijlstra
2012-07-10  8:02               ` Ingo Molnar
2012-07-10  8:21               ` Ingo Molnar
2012-07-10  8:52                 ` Peter Zijlstra
2012-07-10  9:48                   ` Ingo Molnar
2012-07-31 18:11                     ` H. Peter Anvin

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