| From 2fad4e83e12591eb3bd213875b9edc2d18e93383 Mon Sep 17 00:00:00 2001 |
| From: David Sterba <dsterba@suse.cz> |
| Date: Wed, 23 Jul 2014 14:39:35 +0200 |
| Subject: btrfs: wake up transaction thread from SYNC_FS ioctl |
| |
| From: David Sterba <dsterba@suse.cz> |
| |
| 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 <dsterba@suse.cz> |
| Signed-off-by: Chris Mason <clm@fb.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| fs/btrfs/ioctl.c | 6 ++++++ |
| 1 file changed, 6 insertions(+) |
| |
| --- a/fs/btrfs/ioctl.c |
| +++ b/fs/btrfs/ioctl.c |
| @@ -5283,6 +5283,12 @@ long btrfs_ioctl(struct file *file, unsi |
| 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: |
