From: Dave Chinner <david@fromorbit.com>
To: xfs@oss.sgi.com
Subject: [PATCH 3/4] xfs: remove buftarg hash for external devices
Date: Thu, 9 Sep 2010 01:12:57 +1000 [thread overview]
Message-ID: <1283958778-28610-4-git-send-email-david@fromorbit.com> (raw)
In-Reply-To: <1283958778-28610-1-git-send-email-david@fromorbit.com>
From: Dave Chinner <dchinner@redhat.com>
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>
---
fs/xfs/linux-2.6/xfs_buf.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 59df94c..b2b5dea 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1462,7 +1462,11 @@ 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++) {
--
1.7.1
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next prev parent reply other threads:[~2010-09-08 15:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-08 15:12 [RFC] [PATCH 0/4] Replace buffer cache hash with rbtrees Dave Chinner
2010-09-08 15:12 ` [PATCH 1/4] xfs: kill XBF_FS_MANAGED buffers Dave Chinner
2010-09-09 1:33 ` Christoph Hellwig
2010-09-10 3:10 ` Dave Chinner
2010-09-10 21:17 ` Alex Elder
2010-09-08 15:12 ` [PATCH 2/4] xfs: use unhashed buffers for size checks Dave Chinner
2010-09-09 1:38 ` Christoph Hellwig
2010-09-10 3:14 ` Dave Chinner
2010-09-10 21:33 ` Alex Elder
2010-09-08 15:12 ` Dave Chinner [this message]
2010-09-09 1:39 ` [PATCH 3/4] xfs: remove buftarg hash for external devices Christoph Hellwig
2010-09-08 15:12 ` [PATCH 4/4] xfs: convert buffer cache hash to rbtree Dave Chinner
2010-09-09 1:51 ` Christoph Hellwig
2010-09-10 3:22 ` Dave Chinner
2010-09-13 16:59 ` Alex Elder
2010-09-13 16:53 ` Alex Elder
2010-09-14 7:13 ` Dave Chinner
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