lkml.org 
[lkml]   [2011]   [Oct]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [RFC][PATCH 2/2] nfs: scale writeback threshold proportional to dirty threshold
An update from Feng:

Subject: nfs: fix a bug about adjusting nfs_congestion_kb
Date: Tue Oct 18 12:47:58 CST 2011

From: "Tang, Feng" <feng.tang@intel.com>

The VM dirty_thresh may be set to very small(even 0) by wired user, in
such case, nfs_congestion_kb may be adjusted to 0, will cause the normal
NFS write function get congested and deaklocked. So let's set the bottom
line of nfs_congestion_kb to 128kb.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
fs/nfs/write.c | 1 +
1 file changed, 1 insertion(+)

--- linux-next.orig/fs/nfs/write.c 2011-10-17 16:07:40.000000000 +0800
+++ linux-next/fs/nfs/write.c 2011-10-18 12:47:46.000000000 +0800
@@ -1814,6 +1814,7 @@ void nfs_update_congestion_thresh(void)
*/
global_dirty_limits(&background_thresh, &dirty_thresh);
dirty_thresh <<= PAGE_SHIFT - 10;
+ dirty_thresh += 1024;

if (nfs_congestion_kb > dirty_thresh / 8)
nfs_congestion_kb = dirty_thresh / 8;

\
 
 \ /
  Last update: 2011-10-18 10:57    [W:0.066 / U:0.732 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site