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ebf5587261
Currently we force the log and simply try again if we hit a busy extent, but especially with online discard enabled it might take a while after the log force for the busy extents to disappear, and we might have already completed our second pass. So instead we add a new waitqueue and a generation counter to the pag structure so that we can do wakeups once we've removed busy extents, and we replace the single retry with an unconditional one - after all we hold the AGF buffer lock, so no other allocations or frees can be racing with us in this AG. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/*
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* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
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* Copyright (c) 2010 David Chinner.
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* Copyright (c) 2011 Christoph Hellwig.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_EXTENT_BUSY_H__
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#define __XFS_EXTENT_BUSY_H__
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struct xfs_mount;
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struct xfs_trans;
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struct xfs_alloc_arg;
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/*
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* Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that
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* have been freed but whose transactions aren't committed to disk yet.
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*
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* Note that we use the transaction ID to record the transaction, not the
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* transaction structure itself. See xfs_extent_busy_insert() for details.
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*/
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struct xfs_extent_busy {
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struct rb_node rb_node; /* ag by-bno indexed search tree */
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struct list_head list; /* transaction busy extent list */
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xfs_agnumber_t agno;
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xfs_agblock_t bno;
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xfs_extlen_t length;
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unsigned int flags;
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#define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */
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#define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */
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};
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void
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xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
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xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
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void
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xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
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bool do_discard);
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int
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xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,
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xfs_agblock_t bno, xfs_extlen_t len);
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void
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xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno,
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xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
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bool
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xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,
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xfs_extlen_t *len, unsigned *busy_gen);
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void
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xfs_extent_busy_flush(struct xfs_mount *mp, struct xfs_perag *pag,
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unsigned busy_gen);
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void
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xfs_extent_busy_wait_all(struct xfs_mount *mp);
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int
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xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, struct list_head *b);
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static inline void xfs_extent_busy_sort(struct list_head *list)
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{
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list_sort(NULL, list, xfs_extent_busy_ag_cmp);
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}
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#endif /* __XFS_EXTENT_BUSY_H__ */
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