From 6d752cacae5eb8590c98866effaebf67410a9136 Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Wed, 7 Aug 2024 17:13:58 +0100 Subject: [PATCH] btrfs: directly wake up cleaner kthread in the BTRFS_IOC_SYNC ioctl The BTRFS_IOC_SYNC ioctl wants to wake up the cleaner kthread so that it does any pending work (subvolume deletion, delayed iputs, etc), however it is waking up the transaction kthread, which in turn wakes up the cleaner. Since we don't have any transaction to commit, as any ongoing transaction was already committed when it called btrfs_sync_fs() and the goal is just to wake up the cleaner thread, directly wake up the cleaner instead of the transaction kthread. Reviewed-by: Boris Burkov Reviewed-by: Qu Wenruo Signed-off-by: Filipe Manana Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/ioctl.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index e0a664b8a46a..ee01cc828883 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -4765,11 +4765,10 @@ long btrfs_ioctl(struct file *file, unsigned int return ret; ret = btrfs_sync_fs(inode->i_sb, 1); /* - * The transaction thread may want to do more work, - * namely it pokes the cleaner kthread that will start - * processing uncleaned subvols. + * There may be work for the cleaner kthread to do (subvolume + * deletion, delayed iputs, defrag inodes, etc), so wake it up. */ - wake_up_process(fs_info->transaction_kthread); + wake_up_process(fs_info->cleaner_kthread); return ret; } case BTRFS_IOC_START_SYNC: -- 2.25.1