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| 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/xfs_mount.h | |
| parent | bab8b795185bf37801a4f7ee5c321eee288c2f10 (diff) | |
| download | lwn-20a5eab49d354a2837e0af3f07f92a104de52804.tar.gz lwn-20a5eab49d354a2837e0af3f07f92a104de52804.zip | |
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/xfs_mount.h')
| -rw-r--r-- | fs/xfs/xfs_mount.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 8aca2cc173ac..f3269c0626f0 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -210,8 +210,7 @@ typedef struct xfs_mount { struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX]; struct xstats m_stats; /* per-fs stats */ xfs_agnumber_t m_agfrotor; /* last ag where space found */ - xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ - spinlock_t m_agirotor_lock;/* .. and lock protecting it */ + atomic_t m_agirotor; /* last ag dir inode alloced */ /* Memory shrinker to throttle and reprioritize inodegc */ struct shrinker m_inodegc_shrinker; |