linux-kernel - [PATCH 0/2] x86: Fix perf deadlock caused by dumpstack cleanup

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Message-Id: <20140402172639.994587272@goodmis.org>
Date:	Wed, 02 Apr 2014 13:26:39 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	linux-kernel@...r.kernel.org
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 0/2] x86: Fix perf deadlock caused by dumpstack cleanup

Linus,

Here are two patches that fix the deadlock that you discovered.

The first patch is the real culprit, but as I was looking at the code
I realized that the irq stack part was a bit off too. That part didn't
cause the lock up, but needs to be fixed regardless.

Note, I'm hoping to use these clean ups to make x86_64 and i386 code
a bit closer to each other, so I hope the original change does not
get reverted.

-- Steve

Steven Rostedt (Red Hat) (2):
      x86: Fix dumpstack_64 to keep state of "used" variable in loop
      x86: Fix dumpstack_64 irq stack handling

----
 arch/x86/kernel/dumpstack_64.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)
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