diff options
Diffstat (limited to 'target/linux/goldfish/patches-2.6.30/0055-mm-Add-min_free_order_shift-tunable.patch')
| -rw-r--r-- | target/linux/goldfish/patches-2.6.30/0055-mm-Add-min_free_order_shift-tunable.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/target/linux/goldfish/patches-2.6.30/0055-mm-Add-min_free_order_shift-tunable.patch b/target/linux/goldfish/patches-2.6.30/0055-mm-Add-min_free_order_shift-tunable.patch new file mode 100644 index 000000000..aec689108 --- /dev/null +++ b/target/linux/goldfish/patches-2.6.30/0055-mm-Add-min_free_order_shift-tunable.patch @@ -0,0 +1,62 @@ +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; +@@ -1138,6 +1139,14 @@ 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; +@@ -1258,7 +1259,7 @@ 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; |