From af7a65097b3f0a63caf1755df78d04e1a33588ef Mon Sep 17 00:00:00 2001
From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 6 Mar 2014 13:54:56 +0800
Subject: [PATCH] Btrfs: wake up the tasks that wait for the io earlier
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>
---
fs/btrfs/ordered-data.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 73de19c37f5aa..a75eaa286b8a9 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -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;
--
2.30.2