xfs: superblock scrub should use short-lived buffers

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Secondary superblocks are rarely used, so create a helper to read a
given non-primary AG's superblock and ensure that it won't stick around
hogging memory.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

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This commit is contained in:

Darrick J. Wong 2018-05-14 06:34:31 -07:00

parent 8389f3ffa2

commit 689e11c84b

4 changed files with 27 additions and 3 deletions

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22

fs/xfs/libxfs/xfs_sb.c

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3

fs/xfs/libxfs/xfs_sb.h

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1

fs/xfs/libxfs/xfs_shared.h

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4

fs/xfs/scrub/agheader.c

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