[PATCH 19/24] xfs: kill background reclaim work

Dave Chinner
2019-08-01T02:18:14Z

From: Dave Chinner <dchinner@redhat.com>

This function is now entirely done by kswapd, so we don't need the
worker thread to do async reclaim anymore.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
fs/xfs/xfs_icache.c | 44 --------------------------------------------
fs/xfs/xfs_icache.h | 2 --
fs/xfs/xfs_mount.c | 2 --
fs/xfs/xfs_mount.h | 2 --
fs/xfs/xfs_super.c | 11 +----------
5 files changed, 1 insertion(+), 60 deletions(-)

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index e6b9030875b9..0bd4420a7e16 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -138,44 +138,6 @@ xfs_inode_free(
__xfs_inode_free(ip);
}

-/*
- * Queue a new inode reclaim pass if there are reclaimable inodes and there
- * isn't a reclaim pass already in progress. By default it runs every 5s based
- * on the xfs periodic sync default of 30s. Perhaps this should have it's own
- * tunable, but that can be done if this method proves to be ineffective or too
- * aggressive.
- */
-static void
-xfs_reclaim_work_queue(
- struct xfs_mount *mp)
-{
-
- rcu_read_lock();
- if (radix_tree_tagged(&mp->m_perag_tree, XFS_ICI_RECLAIM_TAG)) {
- queue_delayed_work(mp->m_reclaim_workqueue, &mp->m_reclaim_work,
- msecs_to_jiffies(xfs_syncd_centisecs / 6 * 10));
- }
- rcu_read_unlock();
-}
-
-/*
- * This is a fast pass over the inode cache to try to get reclaim moving on as
- * many inodes as possible in a short period of time. It kicks itself every few
- * seconds, as well as being kicked by the inode cache shrinker when memory
- * goes low. It scans as quickly as possible avoiding locked inodes or those
- * already being flushed, and once done schedules a future pass.
- */
-void
-xfs_reclaim_worker(
- struct work_struct *work)
-{
- struct xfs_mount *mp = container_of(to_delayed_work(work),
- struct xfs_mount, m_reclaim_work);
-
- xfs_reclaim_inodes(mp, SYNC_TRYLOCK);
- xfs_reclaim_work_queue(mp);
-}
-
static void
xfs_perag_set_reclaim_tag(
struct xfs_perag *pag)
@@ -192,9 +154,6 @@ xfs_perag_set_reclaim_tag(
XFS_ICI_RECLAIM_TAG);
spin_unlock(&mp->m_perag_lock);

- /* schedule periodic background inode reclaim */
- xfs_reclaim_work_queue(mp);
-
trace_xfs_perag_set_reclaim(mp, pag->pag_agno, -1, _RET_IP_);
}

@@ -1393,9 +1352,6 @@ xfs_reclaim_inodes_nr(
{
int sync_mode = SYNC_TRYLOCK;

- /* kick background reclaimer */
- xfs_reclaim_work_queue(mp);
-
/*
* For kswapd, we kick background inode writeback. For direct
* reclaim, we issue and wait on inode writeback to throttle
diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h
index 48f1fd2bb6ad..4c0d8920cc54 100644
--- a/fs/xfs/xfs_icache.h
+++ b/fs/xfs/xfs_icache.h
@@ -49,8 +49,6 @@ int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
struct xfs_inode * xfs_inode_alloc(struct xfs_mount *mp, xfs_ino_t ino);
void xfs_inode_free(struct xfs_inode *ip);

-void xfs_reclaim_worker(struct work_struct *work);
-
int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
int xfs_reclaim_inodes_count(struct xfs_mount *mp);
long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 322da6909290..a1805021c92f 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -988,7 +988,6 @@ xfs_mountfs(
* qm_unmount_quotas and therefore rely on qm_unmount to release the
* quota inodes.
*/
- cancel_delayed_work_sync(&mp->m_reclaim_work);
xfs_reclaim_inodes(mp, SYNC_WAIT);
xfs_health_unmount(mp);
out_log_dealloc:
@@ -1071,7 +1070,6 @@ xfs_unmountfs(
* reclaim just to be sure. We can stop background inode reclaim
* here as well if it is still running.
*/
- cancel_delayed_work_sync(&mp->m_reclaim_work);
xfs_reclaim_inodes(mp, SYNC_WAIT);
xfs_health_unmount(mp);

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index fdb60e09a9c5..f0cc952ad527 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -165,7 +165,6 @@ typedef struct xfs_mount {
uint m_chsize; /* size of next field */
atomic_t m_active_trans; /* number trans frozen */
struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
- struct delayed_work m_reclaim_work; /* background inode reclaim */
struct delayed_work m_eofblocks_work; /* background eof blocks
trimming */
struct delayed_work m_cowblocks_work; /* background cow blocks
@@ -182,7 +181,6 @@ typedef struct xfs_mount {
struct workqueue_struct *m_buf_workqueue;
struct workqueue_struct *m_unwritten_workqueue;
struct workqueue_struct *m_cil_workqueue;
- struct workqueue_struct *m_reclaim_workqueue;
struct workqueue_struct *m_eofblocks_workqueue;
struct workqueue_struct *m_sync_workqueue;

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 67b59815d0df..09e41c6c1794 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -822,15 +822,10 @@ xfs_init_mount_workqueues(
if (!mp->m_cil_workqueue)
goto out_destroy_unwritten;

- mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
- WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
- if (!mp->m_reclaim_workqueue)
- goto out_destroy_cil;
-
mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
if (!mp->m_eofblocks_workqueue)
- goto out_destroy_reclaim;
+ goto out_destroy_cil;

mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0,
mp->m_fsname);
@@ -841,8 +836,6 @@ xfs_init_mount_workqueues(

out_destroy_eofb:
destroy_workqueue(mp->m_eofblocks_workqueue);
-out_destroy_reclaim:
- destroy_workqueue(mp->m_reclaim_workqueue);
out_destroy_cil:
destroy_workqueue(mp->m_cil_workqueue);
out_destroy_unwritten:
@@ -859,7 +852,6 @@ xfs_destroy_mount_workqueues(
{
destroy_workqueue(mp->m_sync_workqueue);
destroy_workqueue(mp->m_eofblocks_workqueue);
- destroy_workqueue(mp->m_reclaim_workqueue);
destroy_workqueue(mp->m_cil_workqueue);
destroy_workqueue(mp->m_unwritten_workqueue);
destroy_workqueue(mp->m_buf_workqueue);
@@ -1557,7 +1549,6 @@ xfs_mount_alloc(
spin_lock_init(&mp->m_perag_lock);
mutex_init(&mp->m_growlock);
atomic_set(&mp->m_active_trans, 0);
- INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker);
mp->m_kobj.kobject.kset = xfs_kset;
--
2.22.0