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| author | attilio <attilio@FreeBSD.org> | 2013-08-09 11:24:29 +0000 |
|---|---|---|
| committer | attilio <attilio@FreeBSD.org> | 2013-08-09 11:24:29 +0000 |
| commit | 3f74b0e634cf4f4b3796e44533e8318ef773c3e9 (patch) | |
| tree | 04b25801739905ec5fe493144ba4312ddffb67b7 /share/man/man9 | |
| parent | 16c7563cf4ffce21e633bfb33a25ab16072fc75e (diff) | |
| download | FreeBSD-src-3f74b0e634cf4f4b3796e44533e8318ef773c3e9.zip FreeBSD-src-3f74b0e634cf4f4b3796e44533e8318ef773c3e9.tar.gz | |
Give mutex(9) the ability to recurse on a per-instance basis.
Now the MTX_RECURSE flag can be passed to the mtx_*_flag() calls.
This helps in cases we want to narrow down to specific calls the
possibility to recurse for some locks.
Sponsored by: EMC / Isilon storage division
Reviewed by: jeff, alc
Tested by: pho
Diffstat (limited to 'share/man/man9')
| -rw-r--r-- | share/man/man9/mutex.9 | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/share/man/man9/mutex.9 b/share/man/man9/mutex.9 index 628939f..782033c 100644 --- a/share/man/man9/mutex.9 +++ b/share/man/man9/mutex.9 @@ -225,8 +225,10 @@ or lock, respectively, and also accept a .Fa flags argument. -In both cases, the only flag presently available for lock acquires is -.Dv MTX_QUIET . +In both cases, the only flags presently available for lock acquires are +.Dv MTX_QUIET +and +.Dv MTX_RECURSE . If the .Dv MTX_QUIET bit is turned on in the @@ -235,6 +237,12 @@ argument, then if .Dv KTR_LOCK tracing is being done, it will be silenced during the lock acquire. +If the +.Dv MTX_RECURSE +bit is turned on in the +.Fa flags +argument, then the mutex can be acquired recursively. +.Pp .Pp The .Fn mtx_trylock |
