[Cluster-devel] cluster/gfs-kernel/src/gfs ops_file.c
wcheng at sourceware.org
wcheng at sourceware.org
Sun Jun 17 02:56:43 UTC 2007
CVSROOT: /cvs/cluster
Module name: cluster
Branch: RHEL5
Changes by: wcheng at sourceware.org 2007-06-17 02:56:43
Modified files:
gfs-kernel/src/gfs: ops_file.c
Log message:
bugzilla 244134:
Backport gfs datasync patch from RHEL4 to RHEL5 - sampled performance data:
Throughput (lock_nolock)
--- before ---- --- after ---
Min 238.14 KB/s Min 1.00 MB/s
Max 238.14 KB/s Max 1.00 MB/s
Avg 238.14 KB/s Avg 1.00 MB/s
Latency Latency (lock_nolock)
--- before --------- --- after ---------
Min 3805 usec 3 msec Min 821 usec 0 msec
Max 6043 usec 6 msec Max 5466 usec 5 msec
Avg 4182 usec 4 msec Avg 1050 usec 1 msec
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/ops_file.c.diff?cvsroot=cluster&only_with_tag=RHEL5&r1=1.28.2.1&r2=1.28.2.2
--- cluster/gfs-kernel/src/gfs/ops_file.c 2006/11/17 19:48:59 1.28.2.1
+++ cluster/gfs-kernel/src/gfs/ops_file.c 2007/06/17 02:56:43 1.28.2.2
@@ -24,6 +24,7 @@
#include <linux/blkdev.h>
#include <linux/mm.h>
#include <linux/aio.h>
+#include <linux/writeback.h>
#include <asm/uaccess.h>
#include "gfs_ioctl.h"
@@ -1514,6 +1515,7 @@
{
struct gfs_inode *ip = get_v2ip(dentry->d_inode);
struct gfs_holder i_gh;
+ struct inode *inode = dentry->d_inode;
int error;
atomic_inc(&ip->i_sbd->sd_ops_file);
@@ -1524,8 +1526,15 @@
if (gfs_is_jdata(ip))
gfs_log_flush_glock(ip->i_gl);
- else
- i_gh.gh_flags |= GL_SYNC;
+ else {
+ if ((!datasync) || (inode->i_state & I_DIRTY_DATASYNC)) {
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = 0,
+ };
+ error = sync_inode(inode, &wbc);
+ }
+ }
gfs_glock_dq_uninit(&i_gh);
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