diff options
author | Dave Chinner <dchinner@redhat.com> | 2020-07-01 10:21:28 -0700 |
---|---|---|
committer | Darrick J. Wong <darrick.wong@oracle.com> | 2020-07-07 07:15:08 -0700 |
commit | 4d0bab3a44686f26be7ee7295c6c1987605ae35e (patch) | |
tree | a9e50e75e12536f418529645d6c7a7f89c31a0f0 /fs | |
parent | 50718b8d73dda01bb168f9f3b16f6311a2debe7b (diff) | |
download | linux-stable-4d0bab3a44686f26be7ee7295c6c1987605ae35e.tar.gz linux-stable-4d0bab3a44686f26be7ee7295c6c1987605ae35e.tar.bz2 linux-stable-4d0bab3a44686f26be7ee7295c6c1987605ae35e.zip |
xfs: remove SYNC_WAIT from xfs_reclaim_inodes()
Clean up xfs_reclaim_inodes() callers. Most callers want blocking
behaviour, so just make the existing SYNC_WAIT behaviour the
default.
For the xfs_reclaim_worker(), just call xfs_reclaim_inodes_ag()
directly because we just want optimistic clean inode reclaim to be
done in the background.
For xfs_quiesce_attr() we can just remove the inode reclaim calls as
they are a historic relic that was required to flush dirty inodes
that contained unlogged changes. We now log all changes to the
inodes, so the sync AIL push from xfs_log_quiesce() called by
xfs_quiesce_attr() will do all the required inode writeback for
freeze.
Seeing as we now want to loop until all reclaimable inodes have been
reclaimed, make xfs_reclaim_inodes() loop on the XFS_ICI_RECLAIM_TAG
tag rather than having xfs_reclaim_inodes_ag() tell it that inodes
were skipped. This is much more reliable and will always loop until
all reclaimable inodes are reclaimed.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/xfs/xfs_icache.c | 79 | ||||
-rw-r--r-- | fs/xfs/xfs_icache.h | 2 | ||||
-rw-r--r-- | fs/xfs/xfs_mount.c | 11 | ||||
-rw-r--r-- | fs/xfs/xfs_super.c | 3 |
4 files changed, 35 insertions, 60 deletions
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c index 8d18117242e1..f4e7b98d9639 100644 --- a/fs/xfs/xfs_icache.c +++ b/fs/xfs/xfs_icache.c @@ -160,24 +160,6 @@ xfs_reclaim_work_queue( 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, 0); - xfs_reclaim_work_queue(mp); -} - static void xfs_perag_set_reclaim_tag( struct xfs_perag *pag) @@ -1100,7 +1082,7 @@ xfs_reclaim_inode_grab( * dirty, async => requeue * dirty, sync => flush, wait and reclaim */ -static bool +static void xfs_reclaim_inode( struct xfs_inode *ip, struct xfs_perag *pag) @@ -1173,7 +1155,7 @@ reclaim: ASSERT(xfs_inode_clean(ip)); __xfs_inode_free(ip); - return true; + return; out_ifunlock: xfs_ifunlock(ip); @@ -1181,7 +1163,6 @@ out_iunlock: xfs_iunlock(ip, XFS_ILOCK_EXCL); out: xfs_iflags_clear(ip, XFS_IRECLAIM); - return false; } /* @@ -1194,14 +1175,13 @@ out: * so that callers that want to block until all dirty inodes are written back * and reclaimed can sanely loop. */ -static int +static void xfs_reclaim_inodes_ag( struct xfs_mount *mp, int *nr_to_scan) { struct xfs_perag *pag; xfs_agnumber_t ag = 0; - int skipped = 0; while ((pag = xfs_perag_get_tag(mp, ag, XFS_ICI_RECLAIM_TAG))) { unsigned long first_index = 0; @@ -1210,14 +1190,7 @@ xfs_reclaim_inodes_ag( ag = pag->pag_agno + 1; - /* - * If the cursor is not zero, we haven't scanned the whole AG - * so we might have skipped inodes here. - */ first_index = READ_ONCE(pag->pag_ici_reclaim_cursor); - if (first_index) - skipped++; - do { struct xfs_inode *batch[XFS_LOOKUP_BATCH]; int i; @@ -1270,16 +1243,12 @@ xfs_reclaim_inodes_ag( rcu_read_unlock(); for (i = 0; i < nr_found; i++) { - if (!batch[i]) - continue; - if (!xfs_reclaim_inode(batch[i], pag)) - skipped++; + if (batch[i]) + xfs_reclaim_inode(batch[i], pag); } *nr_to_scan -= XFS_LOOKUP_BATCH; - cond_resched(); - } while (nr_found && !done && *nr_to_scan > 0); if (done) @@ -1287,27 +1256,18 @@ xfs_reclaim_inodes_ag( WRITE_ONCE(pag->pag_ici_reclaim_cursor, first_index); xfs_perag_put(pag); } - return skipped; } -int +void xfs_reclaim_inodes( - xfs_mount_t *mp, - int mode) + struct xfs_mount *mp) { int nr_to_scan = INT_MAX; - int skipped; - xfs_reclaim_inodes_ag(mp, &nr_to_scan); - if (!(mode & SYNC_WAIT)) - return 0; - - do { + while (radix_tree_tagged(&mp->m_perag_tree, XFS_ICI_RECLAIM_TAG)) { xfs_ail_push_all_sync(mp->m_ail); - skipped = xfs_reclaim_inodes_ag(mp, &nr_to_scan); - } while (skipped > 0); - - return 0; + xfs_reclaim_inodes_ag(mp, &nr_to_scan); + }; } /* @@ -1426,6 +1386,25 @@ xfs_inode_matches_eofb( return true; } +/* + * 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); + int nr_to_scan = INT_MAX; + + xfs_reclaim_inodes_ag(mp, &nr_to_scan); + xfs_reclaim_work_queue(mp); +} + STATIC int xfs_inode_free_eofblocks( struct xfs_inode *ip, diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h index 93b54e7d55f0..ae92ca53de42 100644 --- a/fs/xfs/xfs_icache.h +++ b/fs/xfs/xfs_icache.h @@ -51,7 +51,7 @@ 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); +void xfs_reclaim_inodes(struct xfs_mount *mp); 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 03158b42a194..c8ae49a1e99c 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -1011,7 +1011,7 @@ xfs_mountfs( * quota inodes. */ cancel_delayed_work_sync(&mp->m_reclaim_work); - xfs_reclaim_inodes(mp, SYNC_WAIT); + xfs_reclaim_inodes(mp); xfs_health_unmount(mp); out_log_dealloc: mp->m_flags |= XFS_MOUNT_UNMOUNTING; @@ -1088,13 +1088,12 @@ xfs_unmountfs( xfs_ail_push_all_sync(mp->m_ail); /* - * And reclaim all inodes. At this point there should be no dirty - * inodes and none should be pinned or locked, but use synchronous - * reclaim just to be sure. We can stop background inode reclaim - * here as well if it is still running. + * Reclaim all inodes. At this point there should be no dirty inodes and + * none should be pinned or locked. Stop background inode reclaim here + * if it is still running. */ cancel_delayed_work_sync(&mp->m_reclaim_work); - xfs_reclaim_inodes(mp, SYNC_WAIT); + xfs_reclaim_inodes(mp); xfs_health_unmount(mp); xfs_qm_unmount(mp); diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 379cbff438bc..5a5d9453cf51 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -890,9 +890,6 @@ xfs_quiesce_attr( /* force the log to unpin objects from the now complete transactions */ xfs_log_force(mp, XFS_LOG_SYNC); - /* reclaim inodes to do any IO before the freeze completes */ - xfs_reclaim_inodes(mp, 0); - xfs_reclaim_inodes(mp, SYNC_WAIT); /* Push the superblock and write an unmount record */ error = xfs_log_sbcount(mp); |