From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
Andy Lutomirski <luto@amacapital.net>,
Linus Torvalds <torvalds@linux-foundation.org>,
Steven Rostedt <rostedt@goodmis.org>,
Brian Gerst <brgerst@gmail.com>,
Kees Cook <keescook@chromium.org>,
Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Byungchul Park <byungchul.park@lge.com>,
Nilay Vaish <nilayvaish@gmail.com>
Subject: [PATCH 1/6] perf/x86: check perf_callchain_store() error
Date: Wed, 24 Aug 2016 11:50:14 -0500 [thread overview]
Message-ID: <dce6d60bab08be2600efd90021d9b85620646161.1472057064.git.jpoimboe@redhat.com> (raw)
In-Reply-To: <cover.1472057064.git.jpoimboe@redhat.com>
Add a check to perf_callchain_kernel() so that it returns early if the
callchain entry array is already full.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
---
arch/x86/events/core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 18a1acf..dcaa887 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2297,7 +2297,8 @@ perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *re
return;
}
- perf_callchain_store(entry, regs->ip);
+ if (perf_callchain_store(entry, regs->ip))
+ return;
dump_trace(NULL, regs, NULL, 0, &backtrace_ops, entry);
}
--
2.7.4
next prev parent reply other threads:[~2016-08-24 16:54 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-24 16:50 [PATCH 0/6] x86/dumpstack: more stack dump improvements Josh Poimboeuf
2016-08-24 16:50 ` Josh Poimboeuf [this message]
2016-09-08 9:48 ` [tip:x86/asm] perf/x86: Check perf_callchain_store() error tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 2/6] oprofile/x86: add regs->ip to oprofile trace Josh Poimboeuf
2016-08-30 11:30 ` Robert Richter
2016-09-08 9:48 ` [tip:x86/asm] oprofile/x86: Add " tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 3/6] x86/dumpstack: make printk_stack_address() more generally useful Josh Poimboeuf
2016-08-24 17:28 ` Joe Perches
2016-08-24 18:43 ` Josh Poimboeuf
2016-08-24 19:07 ` Joe Perches
2016-08-24 19:24 ` Josh Poimboeuf
2016-08-24 19:57 ` Joe Perches
2016-08-24 18:03 ` Linus Torvalds
2016-08-24 18:22 ` Peter Zijlstra
2016-08-24 18:37 ` Linus Torvalds
2016-08-24 19:37 ` Josh Poimboeuf
2016-08-25 17:49 ` Josh Poimboeuf
2016-08-25 20:41 ` Kees Cook
2016-08-25 21:07 ` Josh Poimboeuf
[not found] ` <CA+55aFy3sgA4=ZPhiDWiRMvWj9QPhUd0JBdUr1hm_6G0aSC6uw@mail.gmail.com>
2016-08-26 2:19 ` Kees Cook
2016-08-26 3:19 ` Josh Poimboeuf
2016-08-26 4:40 ` Linus Torvalds
2016-08-26 5:56 ` Josh Poimboeuf
[not found] ` <CA+55aFy8FPRiEr-4p++TGj+keTNsg781q1E1FQZ7z4+nAs0ZaQ@mail.gmail.com>
2016-08-26 13:30 ` Josh Poimboeuf
2016-08-31 16:53 ` Josh Poimboeuf
2016-08-31 17:15 ` Linus Torvalds
2016-09-01 13:09 ` Josh Poimboeuf
2016-09-01 16:30 ` Linus Torvalds
2016-09-08 9:49 ` [tip:x86/asm] x86/dumpstack: Make " tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 4/6] x86/dumpstack: add get_stack_pointer() and get_frame_pointer() Josh Poimboeuf
2016-09-08 9:49 ` [tip:x86/asm] x86/dumpstack: Add " tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 5/6] x86/dumpstack: remove unnecessary stack pointer arguments Josh Poimboeuf
2016-09-08 9:50 ` [tip:x86/asm] x86/dumpstack: Remove " tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 6/6] x86/dumpstack: allow preemption in show_stack_log_lvl() and dump_trace() Josh Poimboeuf
2016-09-08 7:04 ` Ingo Molnar
2016-09-08 21:47 ` Josh Poimboeuf
2016-09-08 21:49 ` [PATCH v2] " Josh Poimboeuf
2016-09-13 18:29 ` Ingo Molnar
2016-09-13 19:38 ` Josh Poimboeuf
2016-09-14 17:39 ` [tip:x86/asm] x86/dumpstack: Allow " tip-bot for Josh Poimboeuf
2016-09-09 6:11 ` [PATCH 6/6] x86/dumpstack: allow " Ingo Molnar
2016-09-01 13:13 ` [PATCH 0/6] x86/dumpstack: more stack dump improvements Josh Poimboeuf
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