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Btrfs: wake up the tasks that wait for the io earlier

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The tasks that wait for the IO_DONE flag just care about the io of the dirty
pages, so it is better to wake up them immediately after all the pages are
written, not the whole process of the io completes.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Miao Xie 2014-03-06 13:54:56 +08:00 committed by Josef Bacik
parent 8b9d83cd6b
commit af7a65097b
1 changed files with 10 additions and 4 deletions
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14
fs/btrfs/ordered-data.c
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@ -349,10 +349,13 @@ int btrfs_dec_test_first_ordered_pending(struct inode *inode,
if (!uptodate)
set_bit(BTRFS_ORDERED_IOERR, &entry->flags);
if (entry->bytes_left == 0)
if (entry->bytes_left == 0) {
ret = test_and_set_bit(BTRFS_ORDERED_IO_DONE, &entry->flags);
else
if (waitqueue_active(&entry->wait))
wake_up(&entry->wait);
} else {
ret = 1;
}
out:
if (!ret && cached && entry) {
*cached = entry;
@ -410,10 +413,13 @@ have_entry:
if (!uptodate)
set_bit(BTRFS_ORDERED_IOERR, &entry->flags);
if (entry->bytes_left == 0)
if (entry->bytes_left == 0) {
ret = test_and_set_bit(BTRFS_ORDERED_IO_DONE, &entry->flags);
else
if (waitqueue_active(&entry->wait))
wake_up(&entry->wait);
} else {
ret = 1;
}
out:
if (!ret && cached && entry) {
*cached = entry;