xfs: use generic percpu counters for free inode counter

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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 <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

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This commit is contained in:

Dave Chinner 2015-02-23 21:19:53 +11:00 • committed by Dave Chinner

parent 501ab32387

commit e88b64ea1f

6 changed files with 42 additions and 48 deletions

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1

fs/xfs/libxfs/xfs_sb.c

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2

fs/xfs/xfs_fsops.c

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76

fs/xfs/xfs_mount.c

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2

fs/xfs/xfs_mount.h

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4

fs/xfs/xfs_super.c

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5

fs/xfs/xfs_trans.c

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