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authorIngo Molnar <mingo@elte.hu>2007-10-15 17:00:19 +0200
committerIngo Molnar <mingo@elte.hu>2007-10-15 17:00:19 +0200
commit71e20f1873d46e138c26ce83f8fe54b7221f572f (patch)
tree3b5c5083d3ffcf7c9d7ddad81acf30c09197ef99 /fs
parentd172fcd3ae1ca7ac27ec8904242fd61e0e11d332 (diff)
downloadlinux-71e20f1873d46e138c26ce83f8fe54b7221f572f.tar.bz2
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')
-rw-r--r--fs/pipe.c6
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);
}