From: David Sterba <dste...@suse.cz>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit 2fad4e83e12591eb3bd213875b9edc2d18e93383 upstream.
The transaction thread may want to do more work, namely it pokes the
cleaner ktread that will start processing uncleaned subvols.
This can be triggered by user via the 'btrfs fi sync' command, otherwise
there was a delay up to 30 seconds before the cleaner started to clean
old snapshots.
Signed-off-by: David Sterba <dste...@suse.cz>
Signed-off-by: Chris Mason <c...@fb.com>
Signed-off-by: Jiri Slaby <jsl...@suse.cz>
---
fs/btrfs/ioctl.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index ad6a08c5801e..50a06debb1bd 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -4571,6 +4571,12 @@ long btrfs_ioctl(struct file *file, unsigned int
if (ret)
return ret;
ret = btrfs_sync_fs(file->f_dentry->d_sb, 1);
+ /*
+ * The transaction thread may want to do more work,
+ * namely it pokes the cleaner ktread that will start
+ * processing uncleaned subvols.
+ */
+ wake_up_process(root->fs_info->transaction_kthread);
return ret;
}
case BTRFS_IOC_START_SYNC:
--
2.1.2
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