xfs: calculate inode walk prefetch more carefully

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The existing inode walk prefetch is based on the old bulkstat code,
which simply allocated 4 pages worth of memory and prefetched that many
inobt records, regardless of however many inodes the caller requested.
65536 inodes is a lot to prefetch (~32M on x64, ~512M on arm64) so let's
scale things down a little more intelligently based on the number of
inodes requested, etc.

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

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Darrick J. Wong 2019-07-02 09:39:40 -07:00

parent 2810bd6840

commit 938c710d99

1 changed files with 45 additions and 3 deletions

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fs/xfs/xfs_iwalk.c

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