From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Rebuilding the reverse-mapping tree requires us to quiesce all inodes in
the filesystem, so we must stop background reclamation of post-EOF and
CoW prealloc blocks.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/xfs_icache.c | 18 ++++++++++++++++++
fs/xfs/xfs_icache.h | 3 +++
fs/xfs/xfs_mount.c | 4 +---
fs/xfs/xfs_super.c | 18 +++++++++---------
4 files changed, 31 insertions(+), 12 deletions(-)
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index d53a316..52f5ab0 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1781,3 +1781,21 @@ xfs_inode_clear_cowblocks_tag(
return __xfs_inode_clear_blocks_tag(ip,
trace_xfs_perag_clear_cowblocks, XFS_ICI_COWBLOCKS_TAG);
}
+
+/* Disable post-EOF and CoW block auto-reclamation. */
+void
+xfs_icache_disable_reclaim(
+ struct xfs_mount *mp)
+{
+ cancel_delayed_work_sync(&mp->m_eofblocks_work);
+ cancel_delayed_work_sync(&mp->m_cowblocks_work);
+}
+
+/* Enable post-EOF and CoW block auto-reclamation. */
+void
+xfs_icache_enable_reclaim(
+ struct xfs_mount *mp)
+{
+ xfs_queue_eofblocks(mp);
+ xfs_queue_cowblocks(mp);
+}
diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h
index d4a7758..d69a0f5 100644
--- a/fs/xfs/xfs_icache.h
+++ b/fs/xfs/xfs_icache.h
@@ -131,4 +131,7 @@ xfs_fs_eofblocks_from_user(
int xfs_icache_inode_is_allocated(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_ino_t ino, bool *inuse);
+void xfs_icache_disable_reclaim(struct xfs_mount *mp);
+void xfs_icache_enable_reclaim(struct xfs_mount *mp);
+
#endif
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 98fd41c..fb950fc 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1076,9 +1076,7 @@ xfs_unmountfs(
uint64_t resblks;
int error;
- cancel_delayed_work_sync(&mp->m_eofblocks_work);
- cancel_delayed_work_sync(&mp->m_cowblocks_work);
-
+ xfs_icache_disable_reclaim(mp);
xfs_fs_unreserve_ag_blocks(mp);
xfs_qm_unmount_quotas(mp);
xfs_rtunmount_inodes(mp);
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index faefba0..33f0dd9 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1351,7 +1351,6 @@ xfs_fs_remount(
*/
xfs_restore_resvblks(mp);
xfs_log_work_queue(mp);
- xfs_queue_eofblocks(mp);
/* Recover any CoW blocks that never got remapped. */
error = xfs_reflink_recover_cow(mp);
@@ -1361,7 +1360,7 @@ xfs_fs_remount(
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
return error;
}
- xfs_queue_cowblocks(mp);
+ xfs_icache_enable_reclaim(mp);
/* Create the per-AG metadata reservation pool .*/
error = xfs_fs_reserve_ag_blocks(mp);
@@ -1371,8 +1370,13 @@ xfs_fs_remount(
/* rw -> ro */
if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & SB_RDONLY)) {
+ /*
+ * Cancel background eofb scanning so it cannot race with the
+ * final log force+buftarg wait and deadlock the remount.
+ */
+ xfs_icache_disable_reclaim(mp);
+
/* Get rid of any leftover CoW reservations... */
- cancel_delayed_work_sync(&mp->m_cowblocks_work);
error = xfs_icache_free_cowblocks(mp, NULL);
if (error) {
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
@@ -1395,12 +1399,6 @@ xfs_fs_remount(
*/
xfs_save_resvblks(mp);
- /*
- * Cancel background eofb scanning so it cannot race with the
- * final log force+buftarg wait and deadlock the remount.
- */
- cancel_delayed_work_sync(&mp->m_eofblocks_work);
-
xfs_quiesce_attr(mp);
mp->m_flags |= XFS_MOUNT_RDONLY;
}
@@ -1420,6 +1418,7 @@ xfs_fs_freeze(
{
struct xfs_mount *mp = XFS_M(sb);
+ xfs_icache_disable_reclaim(mp);
xfs_save_resvblks(mp);
xfs_quiesce_attr(mp);
return xfs_sync_sb(mp, true);
@@ -1433,6 +1432,7 @@ xfs_fs_unfreeze(
xfs_restore_resvblks(mp);
xfs_log_work_queue(mp);
+ xfs_icache_enable_reclaim(mp);
return 0;
}
--
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