From 7e18530bef6a18a5479690ae7e8256319ecf1300 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Mon, 8 Oct 2012 21:56:00 +1100 Subject: [PATCH] xfs: rationalise xfs_mount_wq users Instead of starting and stopping background work on the xfs_mount_wq all at the same time, separate them to where they really are needed to start and stop. The xfs_sync_worker, only needs to be started after all the mount processing has completed successfully, while it needs to be stopped before the log is unmounted. The xfs_reclaim_worker is started on demand, and can be stopped before the unmount process does it's own inode reclaim pass. The xfs_flush_inodes work is run on demand, and so we really only need to ensure that it has stopped running before we start processing an unmount, freeze or remount,ro. Signed-off-by: Dave Chinner Reviewed-by: Mark Tinguely Reviewed-by: Christoph Hellwig Signed-off-by: Ben Myers --- fs/xfs/xfs_mount.c | 6 ++++-- fs/xfs/xfs_super.c | 34 ++++++++++++++-------------------- fs/xfs/xfs_sync.c | 21 +++++---------------- 3 files changed, 23 insertions(+), 38 deletions(-) diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index b2bd3a0e6376..d9a31c6a0c53 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -1450,9 +1450,11 @@ xfs_unmountfs( /* * And reclaim all inodes. At this point there should be no dirty - * inode, and none should be pinned or locked, but use synchronous - * reclaim just to be sure. + * inodes and none should be pinned or locked, but use synchronous + * reclaim just to be sure. We can stop background inode reclaim + * here as well if it is still running. */ + cancel_delayed_work_sync(&mp->m_reclaim_work); xfs_reclaim_inodes(mp, SYNC_WAIT); xfs_qm_unmount(mp); diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 37d1bbce047d..9805cac81fc9 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1005,14 +1005,12 @@ xfs_fs_put_super( { struct xfs_mount *mp = XFS_M(sb); - xfs_filestream_unmount(mp); - cancel_delayed_work_sync(&mp->m_sync_work); - xfs_unmountfs(mp); - cancel_delayed_work_sync(&mp->m_sync_work); - cancel_delayed_work_sync(&mp->m_reclaim_work); cancel_work_sync(&mp->m_flush_work); + xfs_filestream_unmount(mp); + xfs_unmountfs(mp); + xfs_freesb(mp); xfs_icsb_destroy_counters(mp); xfs_destroy_mount_workqueues(mp); @@ -1325,6 +1323,9 @@ xfs_fs_fill_super( spin_lock_init(&mp->m_sb_lock); mutex_init(&mp->m_growlock); atomic_set(&mp->m_active_trans, 0); + INIT_WORK(&mp->m_flush_work, xfs_flush_worker); + INIT_DELAYED_WORK(&mp->m_sync_work, xfs_sync_worker); + INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); mp->m_super = sb; sb->s_fs_info = mp; @@ -1388,15 +1389,9 @@ xfs_fs_fill_super( sb->s_time_gran = 1; set_posix_acl_flag(sb); - INIT_WORK(&mp->m_flush_work, xfs_flush_worker); - INIT_DELAYED_WORK(&mp->m_sync_work, xfs_sync_worker); - INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); - - xfs_syncd_queue_sync(mp); - error = xfs_mountfs(mp); if (error) - goto out_syncd_stop; + goto out_filestream_unmount; root = igrab(VFS_I(mp->m_rootip)); if (!root) { @@ -1413,12 +1408,15 @@ xfs_fs_fill_super( goto out_unmount; } + /* + * The filesystem is successfully mounted, so we can start background + * sync work now. + */ + xfs_syncd_queue_sync(mp); + return 0; - out_syncd_stop: - cancel_delayed_work_sync(&mp->m_sync_work); - cancel_delayed_work_sync(&mp->m_reclaim_work); - cancel_work_sync(&mp->m_flush_work); + out_filestream_unmount: xfs_filestream_unmount(mp); out_free_sb: xfs_freesb(mp); @@ -1437,10 +1435,6 @@ out_destroy_workqueues: out_unmount: xfs_filestream_unmount(mp); xfs_unmountfs(mp); - - cancel_delayed_work_sync(&mp->m_sync_work); - cancel_delayed_work_sync(&mp->m_reclaim_work); - cancel_work_sync(&mp->m_flush_work); goto out_free_sb; } diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_sync.c index 7502f0621fb9..a68761696ab5 100644 --- a/fs/xfs/xfs_sync.c +++ b/fs/xfs/xfs_sync.c @@ -379,9 +379,9 @@ xfs_syncd_queue_sync( } /* - * Every sync period we need to unpin all items, reclaim inodes and sync - * disk quotas. We might need to cover the log to indicate that the - * filesystem is idle and not frozen. + * Every sync period we need to unpin all items in the AIL and push them to + * disk. If there is nothing dirty, then we might need to cover the log to + * indicate that the filesystem is idle and not frozen. */ void xfs_sync_worker( @@ -391,17 +391,7 @@ xfs_sync_worker( struct xfs_mount, m_sync_work); int error; - /* - * We shouldn't write/force the log if we are in the mount/unmount - * process or on a read only filesystem. The workqueue still needs to be - * active in both cases, however, because it is used for inode reclaim - * during these times. Use the MS_ACTIVE flag to avoid doing anything - * during mount. Doing work during unmount is avoided by calling - * cancel_delayed_work_sync on this work queue before tearing down - * the ail and the log in xfs_log_unmount. - */ - if (!(mp->m_super->s_flags & MS_ACTIVE) && - !(mp->m_flags & XFS_MOUNT_RDONLY)) { + if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { /* dgc: errors ignored here */ if (mp->m_super->s_writers.frozen == SB_UNFROZEN && xfs_log_need_covered(mp)) @@ -409,8 +399,7 @@ xfs_sync_worker( else xfs_log_force(mp, 0); - /* start pushing all the metadata that is currently - * dirty */ + /* start pushing all the metadata that is currently dirty */ xfs_ail_push_all(mp->m_ail); } -- 2.20.1