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| author | Waiman Long <[email protected]> | 2015-07-12 01:19:19 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-07-21 08:18:07 +0000 |
| commit | cba77f03f2c7b6cc0b0a44a3c679e0abade7da62 (patch) | |
| tree | daba72ef7775e93627688ce9dd086a6e421c1feb /tools/perf/scripts/python/netdev-times.py | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s39... (diff) | |
| download | kernel-cba77f03f2c7b6cc0b0a44a3c679e0abade7da62.tar.gz kernel-cba77f03f2c7b6cc0b0a44a3c679e0abade7da62.zip | |
locking/pvqspinlock: Fix kernel panic in locking-selftest
Enabling locking-selftest in a VM guest may cause the following
kernel panic:
kernel BUG at .../kernel/locking/qspinlock_paravirt.h:137!
This is due to the fact that the pvqspinlock unlock function is
expecting either a _Q_LOCKED_VAL or _Q_SLOW_VAL in the lock
byte. This patch prevents that bug report by ignoring it when
debug_locks_silent is set. Otherwise, a warning will be printed
if it contains an unexpected value.
With this patch applied, the kernel locking-selftest completed
without any noise.
Tested-by: Masami Hiramatsu <[email protected]>
Signed-off-by: Waiman Long <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')
0 files changed, 0 insertions, 0 deletions