From e88b64ea1f3da64dbb52636377be295c90367377 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Mon, 23 Feb 2015 21:19:53 +1100 Subject: xfs: use generic percpu counters for free inode counter XFS has hand-rolled per-cpu counters for the superblock since before there was any generic implementation. The free inode counter is not used for any limit enforcement - the per-AG free inode counters are used during allocation to determine if there are inode available for allocation. Hence we don't need any of the complexity of the hand-rolled counters and we can simply replace them with generic per-cpu counters similar to the inode counter. This version introduces a xfs_mod_ifree() helper function from Christoph Hellwig. Signed-off-by: Dave Chinner Reviewed-by: Brian Foster Signed-off-by: Dave Chinner --- fs/xfs/xfs_mount.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/xfs/xfs_mount.h') diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 76b18c8c58c5..7ce997d43d81 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -84,6 +84,7 @@ typedef struct xfs_mount { struct xfs_sb m_sb; /* copy of fs superblock */ spinlock_t m_sb_lock; /* sb counter lock */ struct percpu_counter m_icount; /* allocated inodes counter */ + struct percpu_counter m_ifree; /* free inodes counter */ struct xfs_buf *m_sb_bp; /* buffer for superblock */ char *m_fsname; /* filesystem name */ @@ -391,6 +392,7 @@ extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, uint, int); extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); +extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta); extern int xfs_mount_log_sb(xfs_mount_t *); extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); extern int xfs_readsb(xfs_mount_t *, int); -- cgit v1.2.3