This patch adds sysctl variable vm.dirty_limit_ratio.
Signed-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
Signed-off-by: Yuji Kakutani <[EMAIL PROTECTED]>
---
include/linux/sysctl.h | 1 +
include/linux/writeback.h | 1 +
kernel/sysctl.c | 11 +++++++++++
mm/page-writeback.c | 5 +++++
4 files changed, 18 insertions(+)
Index: linux-2.6.20-mm2-bdp/include/linux/sysctl.h
===================================================================
--- linux-2.6.20-mm2-bdp.orig/include/linux/sysctl.h
+++ linux-2.6.20-mm2-bdp/include/linux/sysctl.h
@@ -207,6 +207,7 @@ enum
VM_PANIC_ON_OOM=33, /* panic at out-of-memory */
VM_VDSO_ENABLED=34, /* map VDSO into new processes? */
VM_MIN_SLAB=35, /* Percent pages ignored by zone reclaim */
+ VM_DIRTY_LIMIT_RATIO=36,/* dirty_limit_ratio */
/* s390 vm cmm sysctls */
VM_CMM_PAGES=1111,
Index: linux-2.6.20-mm2-bdp/include/linux/writeback.h
===================================================================
--- linux-2.6.20-mm2-bdp.orig/include/linux/writeback.h
+++ linux-2.6.20-mm2-bdp/include/linux/writeback.h
@@ -95,6 +95,7 @@ static inline int laptop_spinned_down(vo
/* These are exported to sysctl. */
extern int dirty_background_ratio;
extern int vm_dirty_ratio;
+extern int dirty_limit_ratio;
extern int dirty_writeback_interval;
extern int dirty_expire_interval;
extern int block_dump;
Index: linux-2.6.20-mm2-bdp/kernel/sysctl.c
===================================================================
--- linux-2.6.20-mm2-bdp.orig/kernel/sysctl.c
+++ linux-2.6.20-mm2-bdp/kernel/sysctl.c
@@ -684,6 +684,17 @@ static ctl_table vm_table[] = {
.extra2 = &one_hundred,
},
{
+ .ctl_name = VM_DIRTY_LIMIT_RATIO,
+ .procname = "dirty_limit_ratio",
+ .data = &dirty_limit_ratio,
+ .maxlen = sizeof(dirty_limit_ratio),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one_hundred,
+ },
+ {
.ctl_name = VM_DIRTY_WB_CS,
.procname = "dirty_writeback_centisecs",
.data = &dirty_writeback_interval,
Index: linux-2.6.20-mm2-bdp/mm/page-writeback.c
===================================================================
--- linux-2.6.20-mm2-bdp.orig/mm/page-writeback.c
+++ linux-2.6.20-mm2-bdp/mm/page-writeback.c
@@ -75,6 +75,11 @@ int dirty_background_ratio = 10;
int vm_dirty_ratio = 40;
/*
+ * The generator of dirty data is blocked at this percentage
+ */
+int dirty_limit_ratio = 45;
+
+/*
* The interval between `kupdate'-style writebacks, in jiffies
*/
int dirty_writeback_interval = 5 * HZ;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
