diff options
Diffstat (limited to 'fs/xfs/xfs_alloc.c')
| -rw-r--r-- | fs/xfs/xfs_alloc.c | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index acdced86413c..95862bbff56b 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -2469,7 +2469,7 @@ xfs_free_extent( error = xfs_free_ag_extent(tp, args.agbp, args.agno, args.agbno, len, 0); if (!error) - xfs_alloc_busy_insert(tp, args.agno, args.agbno, len); + xfs_alloc_busy_insert(tp, args.agno, args.agbno, len, 0); error0: xfs_perag_put(args.pag); return error; @@ -2480,7 +2480,8 @@ xfs_alloc_busy_insert( struct xfs_trans *tp, xfs_agnumber_t agno, xfs_agblock_t bno, - xfs_extlen_t len) + xfs_extlen_t len, + unsigned int flags) { struct xfs_busy_extent *new; struct xfs_busy_extent *busyp; @@ -2504,6 +2505,7 @@ xfs_alloc_busy_insert( new->bno = bno; new->length = len; INIT_LIST_HEAD(&new->list); + new->flags = flags; /* trace before insert to be able to see failed inserts */ trace_xfs_alloc_busy(tp->t_mountp, agno, bno, len); @@ -2609,6 +2611,18 @@ xfs_alloc_busy_update_extent( xfs_agblock_t bend = bbno + busyp->length; /* + * This extent is currently being discarded. Give the thread + * performing the discard a chance to mark the extent unbusy + * and retry. + */ + if (busyp->flags & XFS_ALLOC_BUSY_DISCARDED) { + spin_unlock(&pag->pagb_lock); + delay(1); + spin_lock(&pag->pagb_lock); + return false; + } + + /* * If there is a busy extent overlapping a user allocation, we have * no choice but to force the log and retry the search. * @@ -2813,7 +2827,8 @@ restart: * If this is a metadata allocation, try to reuse the busy * extent instead of trimming the allocation. */ - if (!args->userdata) { + if (!args->userdata && + !(busyp->flags & XFS_ALLOC_BUSY_DISCARDED)) { if (!xfs_alloc_busy_update_extent(args->mp, args->pag, busyp, fbno, flen, false)) @@ -2979,10 +2994,16 @@ xfs_alloc_busy_clear_one( kmem_free(busyp); } +/* + * Remove all extents on the passed in list from the busy extents tree. + * If do_discard is set skip extents that need to be discarded, and mark + * these as undergoing a discard operation instead. + */ void xfs_alloc_busy_clear( struct xfs_mount *mp, - struct list_head *list) + struct list_head *list, + bool do_discard) { struct xfs_busy_extent *busyp, *n; struct xfs_perag *pag = NULL; @@ -2999,7 +3020,11 @@ xfs_alloc_busy_clear( agno = busyp->agno; } - xfs_alloc_busy_clear_one(mp, pag, busyp); + if (do_discard && busyp->length && + !(busyp->flags & XFS_ALLOC_BUSY_SKIP_DISCARD)) + busyp->flags = XFS_ALLOC_BUSY_DISCARDED; + else + xfs_alloc_busy_clear_one(mp, pag, busyp); } if (pag) { |