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authorDave Chinner <david@fromorbit.com>2012-04-13 16:10:44 +0400
committerBen Myers <bpm@sgi.com>2012-04-17 20:19:47 +0400
commit8a00ebe4cfc90eda9ecb575ba97e22021cd8cf70 (patch)
tree06e97168b62fb7acdf44f6610c1e6ea268822f3d /fs/xfs
parentda5bf95e3cdca348327c82568c2860229c0daaa2 (diff)
downloadlinux-8a00ebe4cfc90eda9ecb575ba97e22021cd8cf70.tar.xz
xfs: Ensure inode reclaim can run during quotacheck
Because the mount process can run a quotacheck and consume lots of inodes, we need to be able to run periodic inode reclaim during the mount process. This will prevent running the system out of memory during quota checks. This essentially reverts 2bcf6e97, but that is safe to do now that the quota sync code that was causing problems during long quotacheck executions is now gone. The reclaim work is currently protected from running during the unmount process by a check against MS_ACTIVE. Unfortunately, this also means that the reclaim work cannot run during mount. The unmount process should stop the reclaim cleanly before freeing anything that the reclaim work depends on, so there is no need to have this guard in place. Also, the inode reclaim work is demand driven, so there is no need to start it immediately during mount. It will be started the moment an inode is queued for reclaim, so qutoacheck will trigger it just fine. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_super.c21
-rw-r--r--fs/xfs/xfs_sync.c19
2 files changed, 19 insertions, 21 deletions
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 93f7a3f750d3..b5aafc395ea1 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -981,8 +981,6 @@ xfs_fs_put_super(
{
struct xfs_mount *mp = XFS_M(sb);
- xfs_syncd_stop(mp);
-
/*
* Blow away any referenced inode in the filestreams cache.
* This can and will cause log traffic as inodes go inactive
@@ -993,6 +991,7 @@ xfs_fs_put_super(
xfs_flush_buftarg(mp->m_ddev_targp, 1);
xfs_unmountfs(mp);
+ xfs_syncd_stop(mp);
xfs_freesb(mp);
xfs_icsb_destroy_counters(mp);
xfs_destroy_mount_workqueues(mp);
@@ -1362,31 +1361,32 @@ xfs_fs_fill_super(
sb->s_time_gran = 1;
set_posix_acl_flag(sb);
- error = xfs_mountfs(mp);
+ error = xfs_syncd_init(mp);
if (error)
goto out_filestream_unmount;
- error = xfs_syncd_init(mp);
+ error = xfs_mountfs(mp);
if (error)
- goto out_unmount;
+ goto out_syncd_stop;
root = igrab(VFS_I(mp->m_rootip));
if (!root) {
error = ENOENT;
- goto out_syncd_stop;
+ goto out_unmount;
}
if (is_bad_inode(root)) {
error = EINVAL;
- goto out_syncd_stop;
+ goto out_unmount;
}
sb->s_root = d_make_root(root);
if (!sb->s_root) {
error = ENOMEM;
- goto out_syncd_stop;
+ goto out_unmount;
}
return 0;
-
+ out_syncd_stop:
+ xfs_syncd_stop(mp);
out_filestream_unmount:
xfs_filestream_unmount(mp);
out_free_sb:
@@ -1403,8 +1403,6 @@ out_destroy_workqueues:
out:
return -error;
- out_syncd_stop:
- xfs_syncd_stop(mp);
out_unmount:
/*
* Blow away any referenced inode in the filestreams cache.
@@ -1416,6 +1414,7 @@ out_destroy_workqueues:
xfs_flush_buftarg(mp->m_ddev_targp, 1);
xfs_unmountfs(mp);
+ xfs_syncd_stop(mp);
goto out_free_sb;
}
diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_sync.c
index 205ebcb34d9e..c318d8a4a631 100644
--- a/fs/xfs/xfs_sync.c
+++ b/fs/xfs/xfs_sync.c
@@ -460,7 +460,15 @@ xfs_sync_worker(
struct xfs_mount, m_sync_work);
int error;
- if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
+ /*
+ * 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. hence use the MS_ACTIVE flag to avoid doing
+ * anything in these periods.
+ */
+ if (!(mp->m_super->s_flags & MS_ACTIVE) &&
+ !(mp->m_flags & XFS_MOUNT_RDONLY)) {
/* dgc: errors ignored here */
if (mp->m_super->s_frozen == SB_UNFROZEN &&
xfs_log_need_covered(mp))
@@ -488,14 +496,6 @@ xfs_syncd_queue_reclaim(
struct xfs_mount *mp)
{
- /*
- * We can have inodes enter reclaim after we've shut down the syncd
- * workqueue during unmount, so don't allow reclaim work to be queued
- * during unmount.
- */
- if (!(mp->m_super->s_flags & MS_ACTIVE))
- return;
-
rcu_read_lock();
if (radix_tree_tagged(&mp->m_perag_tree, XFS_ICI_RECLAIM_TAG)) {
queue_delayed_work(xfs_syncd_wq, &mp->m_reclaim_work,
@@ -564,7 +564,6 @@ xfs_syncd_init(
INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
xfs_syncd_queue_sync(mp);
- xfs_syncd_queue_reclaim(mp);
return 0;
}