perf_counter: x86: Robustify interrupt handling

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Two consecutive NMIs could daze and confuse the machine when the
first would handle the overflow of both counters.

[ Impact: fix false-positive syslog messages under multi-session profiling ]

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Peter Zijlstra 2009-05-14 14:52:17 +02:00 • committed by Ingo Molnar

parent 9e35ad388b

commit a4016a79fc

1 changed files with 13 additions and 3 deletions

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arch/x86/kernel/cpu/perf_counter.c

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