1a387d3be2
When we need to cover the log, we issue dummy transactions to ensure the current log tail is on disk. Unfortunately we currently use the root inode in the dummy transaction, and the act of committing the transaction dirties the inode at the VFS level. As a result, the VFS writeback of the dirty inode will prevent the filesystem from idling long enough for the log covering state machine to complete. The state machine gets stuck in a loop issuing new dummy transactions to cover the log and never makes progress. To avoid this problem, the dummy transactions should not cause externally visible state changes. To ensure this occurs, make sure that dummy transactions log an unchanging field in the superblock as it's state is never propagated outside the filesystem. This allows the log covering state machine to complete successfully and the filesystem now correctly enters a fully idle state about 90s after the last modification was made. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
31 lines
1.3 KiB
C
31 lines
1.3 KiB
C
/*
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* Copyright (c) 2000-2001,2005 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_FSOPS_H__
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#define __XFS_FSOPS_H__
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extern int xfs_fs_geometry(xfs_mount_t *mp, xfs_fsop_geom_t *geo, int nversion);
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extern int xfs_growfs_data(xfs_mount_t *mp, xfs_growfs_data_t *in);
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extern int xfs_growfs_log(xfs_mount_t *mp, xfs_growfs_log_t *in);
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extern int xfs_fs_counts(xfs_mount_t *mp, xfs_fsop_counts_t *cnt);
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extern int xfs_reserve_blocks(xfs_mount_t *mp, __uint64_t *inval,
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xfs_fsop_resblks_t *outval);
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extern int xfs_fs_goingdown(xfs_mount_t *mp, __uint32_t inflags);
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extern int xfs_fs_log_dummy(xfs_mount_t *mp, int flags);
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#endif /* __XFS_FSOPS_H__ */
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