From: Miao Xie Date: Thu, 6 Mar 2014 05:54:56 +0000 (+0800) Subject: Btrfs: wake up the tasks that wait for the io earlier X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=af7a65097b3f0a63caf1755df78d04e1a33588ef;p=linux-beck.git 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 Signed-off-by: Josef Bacik --- diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 73de19c37f5a..a75eaa286b8a 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;