5825294edd
When we are writing to a single file and hit ENOSPC, we trigger a background flush of the inode and try again. Because we hold page locks and the iolock, the flush won't proceed until after we release these locks. This occurs once we've given up and ENOSPC has been reported. Hence if this one is the only dirty inode in the system, we'll get an ENOSPC prematurely. To fix this, remove the async flush from the allocation routines and move it to the top of the write path where we can do a synchronous flush and retry the write again. Only retry once as a second ENOSPC indicates that we really are ENOSPC. This avoids a page cache deadlock when trying to do this flush synchronously in the allocation layer that was identified by Mikulas Patocka. Signed-off-by: Dave Chinner <david@fromorbit.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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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_SYNC_H
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#define XFS_SYNC_H 1
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struct xfs_mount;
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struct xfs_perag;
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typedef struct xfs_sync_work {
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struct list_head w_list;
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struct xfs_mount *w_mount;
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void *w_data; /* syncer routine argument */
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void (*w_syncer)(struct xfs_mount *, void *);
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} xfs_sync_work_t;
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#define SYNC_ATTR 0x0001 /* sync attributes */
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#define SYNC_DELWRI 0x0002 /* look at delayed writes */
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#define SYNC_WAIT 0x0004 /* wait for i/o to complete */
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#define SYNC_BDFLUSH 0x0008 /* BDFLUSH is calling -- don't block */
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#define SYNC_IOWAIT 0x0010 /* wait for all I/O to complete */
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#define SYNC_TRYLOCK 0x0020 /* only try to lock inodes */
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int xfs_syncd_init(struct xfs_mount *mp);
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void xfs_syncd_stop(struct xfs_mount *mp);
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int xfs_sync_inodes(struct xfs_mount *mp, int flags);
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int xfs_sync_fsdata(struct xfs_mount *mp, int flags);
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int xfs_quiesce_data(struct xfs_mount *mp);
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void xfs_quiesce_attr(struct xfs_mount *mp);
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void xfs_flush_inodes(struct xfs_inode *ip);
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int xfs_reclaim_inode(struct xfs_inode *ip, int locked, int sync_mode);
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int xfs_reclaim_inodes(struct xfs_mount *mp, int noblock, int mode);
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void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
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void xfs_inode_clear_reclaim_tag(struct xfs_inode *ip);
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void __xfs_inode_clear_reclaim_tag(struct xfs_mount *mp, struct xfs_perag *pag,
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struct xfs_inode *ip);
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#endif
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