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Commit 46694129 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Darrick J. Wong
Browse files

xfs: improve busy extent sorting 



Sort busy extents by the full block number instead of just the AGNO so
that we can issue consecutive discard requests that the block layer could
merge (although we'll need additional block layer fixes for fast devices).

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
parent ebf55872

fs/xfs/xfs_extent_busy.c

+12 −4
Original line number Diff line number Diff line
@@ -656,9 +656,17 @@ xfs_extent_busy_wait_all( 
int

xfs_extent_busy_ag_cmp(

	void			*priv,

	struct list_head	*a,

	struct list_head	*b)

	struct list_head	*l1,

	struct list_head	*l2)

{

	return container_of(a, struct xfs_extent_busy, list)->agno -

		container_of(b, struct xfs_extent_busy, list)->agno;

	struct xfs_extent_busy	*b1 =

		container_of(l1, struct xfs_extent_busy, list);

	struct xfs_extent_busy	*b2 =

		container_of(l2, struct xfs_extent_busy, list);

	s32 diff;



	diff = b1->agno - b2->agno;

	if (!diff)

		diff = b1->bno - b2->bno;

	return diff;

}