xfs: queue inactivation immediately when free realtime extents are tight

Now that we have made the inactivation of unlinked inodes a background
task to increase the throughput of file deletions, we need to be a
little more careful about how long of a delay we can tolerate.

Similar to the patch doing this for free space on the data device, if
the file being inactivated is a realtime file and the realtime volume is
running low on free extents, we want to run the worker ASAP so that the
realtime allocator can make better decisions.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 0bea604f320a..0ca0b1981de9 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1916,6 +1916,24 @@ xfs_inodegc_start(
 	xfs_inodegc_queue_all(mp);
 }
 
+#ifdef CONFIG_XFS_RT
+static inline bool
+xfs_inodegc_want_queue_rt_file(
+	struct xfs_inode	*ip)
+{
+	struct xfs_mount	*mp = ip->i_mount;
+	uint64_t		freertx;
+
+	if (!XFS_IS_REALTIME_INODE(ip))
+		return false;
+
+	freertx = READ_ONCE(mp->m_sb.sb_frextents);
+	return freertx < mp->m_low_rtexts[XFS_LOWSP_5_PCNT];
+}
+#else
+# define xfs_inodegc_want_queue_rt_file(ip)	(false)
+#endif /* CONFIG_XFS_RT */
+
 /*
  * Schedule the inactivation worker when:
  *
@@ -1938,6 +1956,9 @@ xfs_inodegc_want_queue_work(
 				XFS_FDBLOCKS_BATCH) < 0)
 		return true;
 
+	if (xfs_inodegc_want_queue_rt_file(ip))
+		return true;
+
 	if (xfs_inode_near_dquot_enforcement(ip, XFS_DQTYPE_USER))
 		return true;