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xfs: remove buftarg hash for external devices

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For RT and external log devices, we never use hashed buffers on them
now.  Remove the buftarg hash tables that are set up for them.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Dave Chinner 2010-09-22 10:47:20 +10:00 committed by Alex Elder
parent 1922c949c5
commit 69d6cc76cf
1 changed files with 5 additions and 1 deletions
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6
fs/xfs/linux-2.6/xfs_buf.c
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@ -1458,7 +1458,11 @@ xfs_alloc_bufhash(
{
unsigned int i;
btp->bt_hashshift = external ? 3 : 12; /* 8 or 4096 buckets */
if (external) {
btp->bt_hash = NULL;
return;
}
btp->bt_hashshift = 12; /* 4096 buckets */
btp->bt_hash = kmem_zalloc_large((1 << btp->bt_hashshift) *
sizeof(xfs_bufhash_t));
for (i = 0; i < (1 << btp->bt_hashshift); i++) {