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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-12 07:48:21 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-12 07:48:21 +0300 |
| commit | 1e57c2186fc204ecd5e47f279d00eba3c3db245c (patch) | |
| tree | aad97e94afe668b2fe734ef28536627ec00860d8 /Documentation | |
| parent | 756300983f11a1c6f9457d6d8f57354e0f0fe8d4 (diff) | |
| parent | ea5b41f9d595be354f7a50e56b28c2d72e6e88a5 (diff) | |
| download | linux-1e57c2186fc204ecd5e47f279d00eba3c3db245c.tar.xz | |
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
lockdep: Avoid out of bounds array reference in save_trace()
futex: Take mmap_sem for get_user_pages in fault_in_user_writeable
lockstat: Add usage info to Documentation/lockstat.txt
lockstat: Fix min, max times in /proc/lock_stats
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/lockstat.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/lockstat.txt b/Documentation/lockstat.txt index 9cb9138f7a79..65f4c795015d 100644 --- a/Documentation/lockstat.txt +++ b/Documentation/lockstat.txt @@ -62,8 +62,20 @@ applicable). It also tracks 4 contention points per class. A contention point is a call site that had to wait on lock acquisition. + - CONFIGURATION + +Lock statistics are enabled via CONFIG_LOCK_STATS. + - USAGE +Enable collection of statistics: + +# echo 1 >/proc/sys/kernel/lock_stat + +Disable collection of statistics: + +# echo 0 >/proc/sys/kernel/lock_stat + Look at the current lock statistics: ( line numbers not part of actual output, done for clarity in the explanation |