63 lines
1.9 KiB
Diff
63 lines
1.9 KiB
Diff
From d620f695290e4ffb1586420ba1dbbb5b2c8c075d Mon Sep 17 00:00:00 2001
|
|
From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
|
|
Date: Tue, 17 Feb 2009 14:51:02 -0800
|
|
Subject: [PATCH 055/134] mm: Add min_free_order_shift tunable.
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=utf-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
By default the kernel tries to keep half as much memory free at each
|
|
order as it does for one order below. This can be too agressive when
|
|
running without swap.
|
|
|
|
Signed-off-by: Arve Hjønnevåg <arve@android.com>
|
|
---
|
|
kernel/sysctl.c | 9 +++++++++
|
|
mm/page_alloc.c | 3 ++-
|
|
2 files changed, 11 insertions(+), 1 deletions(-)
|
|
|
|
--- a/kernel/sysctl.c
|
|
+++ b/kernel/sysctl.c
|
|
@@ -77,6 +77,7 @@ extern int suid_dumpable;
|
|
extern char core_pattern[];
|
|
extern int pid_max;
|
|
extern int min_free_kbytes;
|
|
+extern int min_free_order_shift;
|
|
extern int pid_max_min, pid_max_max;
|
|
extern int sysctl_drop_caches;
|
|
extern int percpu_pagelist_fraction;
|
|
@@ -1109,6 +1110,14 @@ static struct ctl_table vm_table[] = {
|
|
.extra1 = &zero,
|
|
},
|
|
{
|
|
+ .ctl_name = CTL_UNNUMBERED,
|
|
+ .procname = "min_free_order_shift",
|
|
+ .data = &min_free_order_shift,
|
|
+ .maxlen = sizeof(min_free_order_shift),
|
|
+ .mode = 0644,
|
|
+ .proc_handler = &proc_dointvec
|
|
+ },
|
|
+ {
|
|
.ctl_name = VM_PERCPU_PAGELIST_FRACTION,
|
|
.procname = "percpu_pagelist_fraction",
|
|
.data = &percpu_pagelist_fraction,
|
|
--- a/mm/page_alloc.c
|
|
+++ b/mm/page_alloc.c
|
|
@@ -119,6 +119,7 @@ static char * const zone_names[MAX_NR_ZO
|
|
};
|
|
|
|
int min_free_kbytes = 1024;
|
|
+int min_free_order_shift = 1;
|
|
|
|
unsigned long __meminitdata nr_kernel_pages;
|
|
unsigned long __meminitdata nr_all_pages;
|
|
@@ -1253,7 +1254,7 @@ int zone_watermark_ok(struct zone *z, in
|
|
free_pages -= z->free_area[o].nr_free << o;
|
|
|
|
/* Require fewer higher order pages to be free */
|
|
- min >>= 1;
|
|
+ min >>= min_free_order_shift;
|
|
|
|
if (free_pages <= min)
|
|
return 0;
|