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| author | Dave Chinner <david@fromorbit.com> | 2009-04-06 18:47:27 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@brick.lst.de> | 2009-04-06 18:47:27 +0200 |
| commit | e43afd72d2455defd63a3f94f22fa09b586e58ed (patch) | |
| tree | a883a748374d5f63bf030dcf445723a901f88357 /fs/xfs | |
| parent | 5825294edd3364cbba6514f70d88debec4f6cec7 (diff) | |
| download | linux-e43afd72d2455defd63a3f94f22fa09b586e58ed.tar.gz | |
xfs: block callers of xfs_flush_inodes() correctly
xfs_flush_inodes() currently uses a magic timeout to wait for some inodes to be flushed before returning. This isn't really reliable but used to be the best that could be done due to deadlock potential of waiting for the entire flush. Now the inode flush is safe to execute while we hold page and inode locks, we can wait for all the inodes to flush synchronously. Convert the wait mechanism to a completion to do this efficiently. This should remove all remaining spurious ENOSPC errors from the delayed allocation reservation path. This is extracted almost line for line from a larger patch from Mikulas Patocka. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_sync.c | 12 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_sync.h | 1 |
2 files changed, 10 insertions, 3 deletions
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index 73cf8dc19738..f7ba76633c29 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -404,7 +404,8 @@ STATIC void xfs_syncd_queue_work( struct xfs_mount *mp, void *data, - void (*syncer)(struct xfs_mount *, void *)) + void (*syncer)(struct xfs_mount *, void *), + struct completion *completion) { struct xfs_sync_work *work; @@ -413,6 +414,7 @@ xfs_syncd_queue_work( work->w_syncer = syncer; work->w_data = data; work->w_mount = mp; + work->w_completion = completion; spin_lock(&mp->m_sync_lock); list_add_tail(&work->w_list, &mp->m_sync_list); spin_unlock(&mp->m_sync_lock); @@ -441,10 +443,11 @@ xfs_flush_inodes( xfs_inode_t *ip) { struct inode *inode = VFS_I(ip); + DECLARE_COMPLETION_ONSTACK(completion); igrab(inode); - xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inodes_work); - delay(msecs_to_jiffies(500)); + xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inodes_work, &completion); + wait_for_completion(&completion); xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC); } @@ -514,6 +517,8 @@ xfssyncd( list_del(&work->w_list); if (work == &mp->m_sync_work) continue; + if (work->w_completion) + complete(work->w_completion); kmem_free(work); } } @@ -527,6 +532,7 @@ xfs_syncd_init( { mp->m_sync_work.w_syncer = xfs_sync_worker; mp->m_sync_work.w_mount = mp; + mp->m_sync_work.w_completion = NULL; mp->m_sync_task = kthread_run(xfssyncd, mp, "xfssyncd"); if (IS_ERR(mp->m_sync_task)) return -PTR_ERR(mp->m_sync_task); diff --git a/fs/xfs/linux-2.6/xfs_sync.h b/fs/xfs/linux-2.6/xfs_sync.h index 6e83a35626ed..308d5bf6dfbd 100644 --- a/fs/xfs/linux-2.6/xfs_sync.h +++ b/fs/xfs/linux-2.6/xfs_sync.h @@ -26,6 +26,7 @@ typedef struct xfs_sync_work { struct xfs_mount *w_mount; void *w_data; /* syncer routine argument */ void (*w_syncer)(struct xfs_mount *, void *); + struct completion *w_completion; } xfs_sync_work_t; #define SYNC_ATTR 0x0001 /* sync attributes */ |