Commit 3ec9a4c8 authored Jan 11, 2019 by Josef Bacik Committed by David Sterba Jan 18, 2019

btrfs: run delayed iputs before committing



Delayed iputs means we can have final iputs of deleted inodes in the
queue, which could potentially generate a lot of pinned space that could
be free'd.  So before we decide to commit the transaction for ENOPSC
reasons, run the delayed iputs so that any potential space is free'd up.
If there is and we freed enough we can then commit the transaction and
potentially be able to make our reservation.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

parent 74d5d229

fs/btrfs/extent-tree.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -4952,6 +4952,15 @@ static void flush_space(struct btrfs_fs_info *fs_info,
		ret = 0;
		break;
		case COMMIT_TRANS:
		/*
		* If we have pending delayed iputs then we could free up a
		* bunch of pinned space, so make sure we run the iputs before
		* we do our pinned bytes check below.
		*/
		mutex_lock(&fs_info->cleaner_delayed_iput_mutex);
		btrfs_run_delayed_iputs(fs_info);
		mutex_unlock(&fs_info->cleaner_delayed_iput_mutex);

		ret = may_commit_transaction(fs_info, space_info);
		break;
		default:

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