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authorCarlos Maiolino <cmaiolino@redhat.com>2017-08-08 18:21:50 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2017-08-22 09:22:23 -0700
commitd3a304b6292168b83b45d624784f973fdc1ca674 (patch)
treeb5ce2c2743561ae11dff0c926d388cf2f5d112c0 /fs/xfs/xfs_buf_item.h
parent0b80ae6ed13169bd3a244e71169f2cc020b0c57a (diff)
downloadlinux-d3a304b6292168b83b45d624784f973fdc1ca674.tar.bz2
xfs: Properly retry failed inode items in case of error during buffer writeback
When a buffer has been failed during writeback, the inode items into it are kept flush locked, and are never resubmitted due the flush lock, so, if any buffer fails to be written, the items in AIL are never written to disk and never unlocked. This causes unmount operation to hang due these items flush locked in AIL, but this also causes the items in AIL to never be written back, even when the IO device comes back to normal. I've been testing this patch with a DM-thin device, creating a filesystem larger than the real device. When writing enough data to fill the DM-thin device, XFS receives ENOSPC errors from the device, and keep spinning on xfsaild (when 'retry forever' configuration is set). At this point, the filesystem can not be unmounted because of the flush locked items in AIL, but worse, the items in AIL are never retried at all (once xfs_inode_item_push() will skip the items that are flush locked), even if the underlying DM-thin device is expanded to the proper size. This patch fixes both cases, retrying any item that has been failed previously, using the infra-structure provided by the previous patch. Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_buf_item.h')
-rw-r--r--fs/xfs/xfs_buf_item.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index f7eba99d19dd..530686e1afb9 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -70,6 +70,9 @@ void xfs_buf_attach_iodone(struct xfs_buf *,
xfs_log_item_t *);
void xfs_buf_iodone_callbacks(struct xfs_buf *);
void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
+bool xfs_buf_resubmit_failed_buffers(struct xfs_buf *,
+ struct xfs_log_item *,
+ struct list_head *);
extern kmem_zone_t *xfs_buf_item_zone;