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Message-Id: <45b8feb4ecf3b4fecdfad14337e64fccae811763.1200905287.git.swhiteho@redhat.com>
Date: Mon, 21 Jan 2008 09:21:59 +0000
From: swhiteho@...hat.com
To: linux-kernel@...r.kernel.org, cluster-devel@...hat.com
Cc: Bob Peterson <rpeterso@...hat.com>,
Steven Whitehouse <swhiteho@...hat.com>
Subject: [PATCH 41/58] [GFS2] Function meta_read optimization
From: Bob Peterson <rpeterso@...hat.com>
This patch optimizes function gfs2_meta_read. Basically, gfs2_meta_wait
was being called regardless of whether a disk read was requested.
This just pulls that wait into the if that triggers the read.
Signed-off-by: Bob Peterson <rpeterso@...hat.com>
Signed-off-by: Steven Whitehouse <swhiteho@...hat.com>
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 9688785..bc28bc6 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -222,13 +222,14 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
struct buffer_head **bhp)
{
*bhp = getbuf(gl, blkno, CREATE);
- if (!buffer_uptodate(*bhp))
+ if (!buffer_uptodate(*bhp)) {
ll_rw_block(READ_META, 1, bhp);
- if (flags & DIO_WAIT) {
- int error = gfs2_meta_wait(gl->gl_sbd, *bhp);
- if (error) {
- brelse(*bhp);
- return error;
+ if (flags & DIO_WAIT) {
+ int error = gfs2_meta_wait(gl->gl_sbd, *bhp);
+ if (error) {
+ brelse(*bhp);
+ return error;
+ }
}
}
--
1.5.1.2
--
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