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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-06-03 14:01:36 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-03 14:57:03 +0200 |
| commit | a96bbc16418bc691317f265d6bf98ba941ca9c1a (patch) | |
| tree | 136e40a12a94653e8224d6c09d5384b4140e0532 /Documentation/perf_counter/builtin-record.c | |
| parent | 8229289b607682f90b946ad2c319526303c17700 (diff) | |
| download | lwn-a96bbc16418bc691317f265d6bf98ba941ca9c1a.tar.gz lwn-a96bbc16418bc691317f265d6bf98ba941ca9c1a.zip | |
perf_counter: Fix race in counter initialization
We need the PID namespace and counter ID available when the
counter overflows and we need to generate a sample event.
[ Impact: fix kernel crash with high-frequency sampling ]
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
[ fixed a further crash and cleaned up the initialization a bit ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation/perf_counter/builtin-record.c')
0 files changed, 0 insertions, 0 deletions