Unverified Commit 37dafafe authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
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!14893 btrfs: flush delalloc workers queue before stopping cleaner kthread during unmount 

Merge Pull Request from: @ci-robot 
 
PR sync from: Yongjian Sun <sunyongjian1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/QTPWLHWUWEF4DMDQHDE46T6YBGJ7ZDSX/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBIAEJ 
 
Link:https://gitee.com/openeuler/kernel/pulls/14893

 

Reviewed-by: default avatarZhang Peng <zhangpeng362@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents 876c3b68 19beddfb

fs/btrfs/disk-io.c

+9 −0
Original line number Diff line number Diff line
@@ -4323,6 +4323,15 @@ void __cold close_ctree(struct btrfs_fs_info *fs_info) 
	 * already the cleaner, but below we run all pending delayed iputs.

	 */

	btrfs_flush_workqueue(fs_info->fixup_workers);

	/*

	 * Similar case here, we have to wait for delalloc workers before we

	 * proceed below and stop the cleaner kthread, otherwise we trigger a

	 * use-after-tree on the cleaner kthread task_struct when a delalloc

	 * worker running submit_compressed_extents() adds a delayed iput, which

	 * does a wake up on the cleaner kthread, which was already freed below

	 * when we call kthread_stop().

	 */

	btrfs_flush_workqueue(fs_info->delalloc_workers);



	/*

	 * After we parked the cleaner kthread, ordered extents may have