xfs: convert xfs_ialloc_next_ag() to an atomic

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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>

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This commit is contained in:

Dave Chinner 2023-02-13 09:14:52 +11:00

parent bab8b79518

commit 20a5eab49d

4 changed files with 4 additions and 20 deletions

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17

fs/xfs/libxfs/xfs_ialloc.c

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3

fs/xfs/libxfs/xfs_sb.c

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3

fs/xfs/xfs_mount.h

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1

fs/xfs/xfs_super.c

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