lkml.org 
[lkml]   [2007]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 2/3] writeback: introduce dirty_volatile_interval
Introduce dirty_volatile_interval for the minimal dirty time.
Inodes dirtied less than dirty_volatile_interval will not be
considered for syncing by kupdate-style writeback.

This new parameter will be used in clustered writeback.
The old dirty_expire_interval is still(but less) respected.

Cc: Chris Mason <chris.mason@oracle.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: David Chinner <dgc@sgi.com>
Cc: Ken Chen <kenchen@google.com>
Cc: Michael Rubin <mrubin@google.com>
Cc: Andrew Morton <akpm@osdl.org>
Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
---
include/linux/writeback.h | 1 +
kernel/sysctl.c | 7 +++++++
mm/page-writeback.c | 5 +++++
3 files changed, 13 insertions(+)

--- linux-2.6.23-rc3-mm1.orig/include/linux/writeback.h
+++ linux-2.6.23-rc3-mm1/include/linux/writeback.h
@@ -101,6 +101,7 @@ extern int dirty_background_ratio;
extern int vm_dirty_ratio;
extern int dirty_writeback_interval;
extern int dirty_expire_interval;
+extern int dirty_volatile_interval;
extern int block_dump;
extern int laptop_mode;

--- linux-2.6.23-rc3-mm1.orig/mm/page-writeback.c
+++ linux-2.6.23-rc3-mm1/mm/page-writeback.c
@@ -85,6 +85,11 @@ int dirty_writeback_interval = 5 * HZ;
int dirty_expire_interval = 30 * HZ;

/*
+ * The shortest number of jiffies for which data should remain dirty
+ */
+int dirty_volatile_interval = 5 * HZ;
+
+/*
* Flag that makes the machine dump writes/reads and block dirtyings.
*/
int block_dump;
--- linux-2.6.23-rc3-mm1.orig/kernel/sysctl.c
+++ linux-2.6.23-rc3-mm1/kernel/sysctl.c
@@ -837,6 +837,13 @@ static struct ctl_table vm_table[] = {
.proc_handler = &proc_dointvec_userhz_jiffies,
},
{
+ .procname = "dirty_volatile_centisecs",
+ .data = &dirty_volatile_interval,
+ .maxlen = sizeof(dirty_volatile_interval),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_userhz_jiffies,
+ },
+ {
.ctl_name = VM_NR_PDFLUSH_THREADS,
.procname = "nr_pdflush_threads",
.data = &nr_pdflush_threads,
--
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-08-27 13:37    [W:0.038 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site