[08/45] xfs: add frextents to the lazysbcounters when rtgroups enabled

Commit Message

Darrick J. Wong Dec. 30, 2022, 10:19 p.m. UTC

From: Darrick J. Wong <[e-mail]>

Make the free rt extent count a part of the lazy sb counters when the
realtime groups feature is enabled.  This is possible because the patch
to recompute frextents from the rtbitmap during log recovery predates
the code adding rtgroup support, hence we know that the value will
always be correct during runtime.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 include/xfs_mount.h |    1 +
 libxfs/xfs_sb.c     |    5 +++++
 2 files changed, 6 insertions(+)

Patch

diff --git a/include/xfs_mount.h b/include/xfs_mount.h
index 5987650c639..ed19b15fcb5 100644
--- a/include/xfs_mount.h
+++ b/include/xfs_mount.h
@@ -28,6 +28,7 @@  typedef struct xfs_mount {
 #define m_icount	m_sb.sb_icount
 #define m_ifree		m_sb.sb_ifree
 #define m_fdblocks	m_sb.sb_fdblocks
+#define m_frextents	m_sb.sb_frextents
 	spinlock_t		m_sb_lock;
 
 	/*
diff --git a/libxfs/xfs_sb.c b/libxfs/xfs_sb.c
index 0ba9143e7c5..1bcffb24761 100644
--- a/libxfs/xfs_sb.c
+++ b/libxfs/xfs_sb.c
@@ -1087,6 +1087,9 @@  xfs_log_sb(
 	 * sb counters, despite having a percpu counter. It is always kept
 	 * consistent with the ondisk rtbitmap by xfs_trans_apply_sb_deltas()
 	 * and hence we don't need have to update it here.
+	 *
+	 * sb_frextents was added to the lazy sb counters when the rt groups
+	 * feature was introduced.
 	 */
 	if (xfs_has_lazysbcount(mp)) {
 		mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount);
@@ -1095,6 +1098,8 @@  xfs_log_sb(
 				mp->m_sb.sb_icount);
 		mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks);
 	}
+	if (xfs_has_rtgroups(mp))
+		mp->m_sb.sb_frextents = percpu_counter_sum(&mp->m_frextents);
 
 	xfs_sb_to_disk(bp->b_addr, &mp->m_sb);
 	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);