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xfs: Don't wake the aild once per second

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Now that the AIL push algorithm is traversal safe, we don't need a
watchdog function in the xfsaild to catch pushes that fail to make
progress. Remove the watchdog timeout and make pushes purely driven
by demand. This will remove the once-per-second wakeup that is seen
when the filesystem is idle and make laptop power misers happy.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Dave Chinner
2010-01-11 11:49:58 +00:00
committed by Alex Elder
parent f0a7695380
commit 453eac8a9a
2 changed files with 14 additions and 12 deletions
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7
fs/xfs/linux-2.6/xfs_super.c
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@@ -877,12 +877,11 @@ xfsaild(
{
struct xfs_ail *ailp = data;
xfs_lsn_t last_pushed_lsn = 0;
long tout = 0;
long tout = 0; /* milliseconds */
while (!kthread_should_stop()) {
if (tout)
schedule_timeout_interruptible(msecs_to_jiffies(tout));
tout = 1000;
schedule_timeout_interruptible(tout ?
msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT);
/* swsusp */
try_to_freeze();