diff options
| author | Dave Chinner <dchinner@redhat.com> | 2023-02-13 09:14:52 +1100 |
|---|---|---|
| committer | Dave Chinner <dchinner@redhat.com> | 2023-02-13 09:14:52 +1100 |
| commit | 20a5eab49d354a2837e0af3f07f92a104de52804 (patch) | |
| tree | d22bcfd3a0517eea0b18a00ea9b1b8d7a7cdeac3 /fs/xfs/libxfs/xfs_sb.c | |
| parent | bab8b795185bf37801a4f7ee5c321eee288c2f10 (diff) | |
xfs: convert xfs_ialloc_next_ag() to an atomic
This is currently a spinlock lock protected rotor which can be
implemented with a single atomic operation. Change it to be more
efficient and get rid of the m_agirotor_lock. Noticed while
converting the inode allocation AG selection loop to active perag
references.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs/libxfs/xfs_sb.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_sb.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index 1eeecf2eb2a7..99cc03a298e2 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -909,7 +909,8 @@ xfs_sb_mount_common( struct xfs_mount *mp, struct xfs_sb *sbp) { - mp->m_agfrotor = mp->m_agirotor = 0; + mp->m_agfrotor = 0; + atomic_set(&mp->m_agirotor, 0); mp->m_maxagi = mp->m_sb.sb_agcount; mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; |