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| author | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:19 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:19 +0200 |
| commit | 71e20f1873d46e138c26ce83f8fe54b7221f572f (patch) | |
| tree | 3b5c5083d3ffcf7c9d7ddad81acf30c09197ef99 /fs/pipe.c | |
| parent | d172fcd3ae1ca7ac27ec8904242fd61e0e11d332 (diff) | |
| download | lwn-71e20f1873d46e138c26ce83f8fe54b7221f572f.tar.gz lwn-71e20f1873d46e138c26ce83f8fe54b7221f572f.zip | |
sched: affine sync wakeups
make sync wakeups affine for cache-cold tasks: if a cache-cold task
is woken up by a sync wakeup then use the opportunity to migrate it
straight away. (the two tasks are 'related' because they communicate)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'fs/pipe.c')
| -rw-r--r-- | fs/pipe.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/pipe.c b/fs/pipe.c index f1fa2b412f0e..e66ec48e95d8 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -382,7 +382,7 @@ redo: /* Signal writers asynchronously that there is more room. */ if (do_wakeup) { - wake_up_interruptible(&pipe->wait); + wake_up_interruptible_sync(&pipe->wait); kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT); } if (ret > 0) @@ -555,7 +555,7 @@ redo2: out: mutex_unlock(&inode->i_mutex); if (do_wakeup) { - wake_up_interruptible(&pipe->wait); + wake_up_interruptible_sync(&pipe->wait); kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN); } if (ret > 0) @@ -649,7 +649,7 @@ pipe_release(struct inode *inode, int decr, int decw) if (!pipe->readers && !pipe->writers) { free_pipe_info(inode); } else { - wake_up_interruptible(&pipe->wait); + wake_up_interruptible_sync(&pipe->wait); kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN); kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT); } |