diff options
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_super.c | 19 | ||||
| -rw-r--r-- | fs/xfs/xfs_sync.c | 67 |
2 files changed, 14 insertions, 72 deletions
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 27d5a92e1210..b5e445a13f7b 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1057,7 +1057,6 @@ xfs_fs_sync_fs( int wait) { struct xfs_mount *mp = XFS_M(sb); - int error; /* * Doing anything during the async pass would be counterproductive. @@ -1065,10 +1064,7 @@ xfs_fs_sync_fs( if (!wait) return 0; - error = xfs_quiesce_data(mp); - if (error) - return -error; - + xfs_log_force(mp, XFS_LOG_SYNC); if (laptop_mode) { /* * The disk must be active because we're syncing. @@ -1238,15 +1234,12 @@ xfs_fs_remount( /* rw -> ro */ if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { /* - * After we have synced the data but before we sync the - * metadata, we need to free up the reserve block pool so that - * the used block count in the superblock on disk is correct at - * the end of the remount. Stash the current reserve pool size - * so that if we get remounted rw, we can return it to the same - * size. + * Before we sync the metadata, we need to free up the reserve + * block pool so that the used block count in the superblock on + * disk is correct at the end of the remount. Stash the current + * reserve pool size so that if we get remounted rw, we can + * return it to the same size. */ - - xfs_quiesce_data(mp); xfs_save_resvblks(mp); xfs_quiesce_attr(mp); mp->m_flags |= XFS_MOUNT_RDONLY; diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_sync.c index 15be21f074fd..581eb59a85b5 100644 --- a/fs/xfs/xfs_sync.c +++ b/fs/xfs/xfs_sync.c @@ -214,70 +214,16 @@ xfs_inode_ag_iterator( return XFS_ERROR(last_error); } -STATIC int -xfs_sync_fsdata( - struct xfs_mount *mp) -{ - struct xfs_buf *bp; - int error; - - /* - * If the buffer is pinned then push on the log so we won't get stuck - * waiting in the write for someone, maybe ourselves, to flush the log. - * - * Even though we just pushed the log above, we did not have the - * superblock buffer locked at that point so it can become pinned in - * between there and here. - */ - bp = xfs_getsb(mp, 0); - if (xfs_buf_ispinned(bp)) - xfs_log_force(mp, 0); - error = xfs_bwrite(bp); - xfs_buf_relse(bp); - return error; -} - -/* - * When remounting a filesystem read-only or freezing the filesystem, we have - * two phases to execute. This first phase is syncing the data before we - * quiesce the filesystem, and the second is flushing all the inodes out after - * we've waited for all the transactions created by the first phase to - * complete. The second phase ensures that the inodes are written to their - * location on disk rather than just existing in transactions in the log. This - * means after a quiesce there is no log replay required to write the inodes to - * disk (this is the main difference between a sync and a quiesce). - */ -/* - * First stage of freeze - no writers will make progress now we are here, - * so we flush delwri and delalloc buffers here, then wait for all I/O to - * complete. Data is frozen at that point. Metadata is not frozen, - * transactions can still occur here so don't bother emptying the AIL - * because it'll just get dirty again. - */ -int -xfs_quiesce_data( - struct xfs_mount *mp) -{ - int error, error2 = 0; - - /* force out the log */ - xfs_log_force(mp, XFS_LOG_SYNC); - - /* write superblock and hoover up shutdown errors */ - error = xfs_sync_fsdata(mp); - - /* mark the log as covered if needed */ - if (xfs_log_need_covered(mp)) - error2 = xfs_fs_log_dummy(mp); - - return error ? error : error2; -} - /* * Second stage of a quiesce. The data is already synced, now we have to take * care of the metadata. New transactions are already blocked, so we need to * wait for any remaining transactions to drain out before proceeding. * + * The second phase ensures that the inodes are written to their + * location on disk rather than just existing in transactions in the log. This + * means after a quiesce there is no log replay required to write the inodes to + * disk (this is the main difference between a sync and a quiesce). + * * Note: this stops background sync work - the callers must ensure it is started * again when appropriate. */ @@ -291,6 +237,9 @@ xfs_quiesce_attr( while (atomic_read(&mp->m_active_trans) > 0) delay(100); + /* force the log to unpin objects from the now complete transactions */ + xfs_log_force(mp, XFS_LOG_SYNC); + /* reclaim inodes to do any IO before the freeze completes */ xfs_reclaim_inodes(mp, 0); xfs_reclaim_inodes(mp, SYNC_WAIT); |
