diff options
| author | Cyrill Gorcunov <[email protected]> | 2010-05-14 23:08:15 +0400 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2010-05-15 08:38:55 +0200 |
| commit | 1ff3d7d79204612ebe2e611d2592f8898908ca00 (patch) | |
| tree | 666a907c25cc9ebeff05dfe982b5d480f42f64ad /net | |
| parent | 5d2be7cb198a0a6bc6088d3806fb7261b184ad89 (diff) | |
x86, perf: P4 PMU - fix counters management logic
Jaswinder reported this #GP:
|
| Message from syslogd@ht at May 14 09:39:32 ...
| kernel:[ 314.908612] EIP: [<c100ccca>]
| x86_perf_event_set_period+0x19d/0x1b2 SS:ESP 0068:edac3d70
|
Ming has narrowed it down to a comparision issue
between arguments with different sizes and
signs. As result event index reached a wrong
value which in turn led to a GP fault.
At the same time it was found that p4_next_cntr
has broken logic and should return the counter
index only if it was not yet borrowed for
another event.
Reported-by: Jaswinder Singh Rajput <[email protected]>
Reported-by: Lin Ming <[email protected]>
Bisected-by: Lin Ming <[email protected]>
Tested-by: Jaswinder Singh Rajput <[email protected]>
Signed-off-by: Cyrill Gorcunov <[email protected]>
CC: Peter Zijlstra <[email protected]>
CC: Frederic Weisbecker <[email protected]>
LKML-Reference: <20100514190815.GG13509@lenovo>
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions