mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-16 14:09:42 +02:00
72 lines
2.5 KiB
Diff
72 lines
2.5 KiB
Diff
|
From 3742e6638bdb7325c6432e2a145ad985ee47d052 Mon Sep 17 00:00:00 2001
|
||
|
|
From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
|
||
|
|
Date: Mon, 26 Jan 2009 19:13:47 -0800
|
||
|
|
Subject: [PATCH 052/134] lowmemorykiller: Only iterate over process list when needed.
|
||
|
|
MIME-Version: 1.0
|
||
|
|
Content-Type: text/plain; charset=utf-8
|
||
|
|
Content-Transfer-Encoding: 8bit
|
||
|
|
|
||
|
|
Use NR_ACTIVE plus NR_INACTIVE as a size estimate for our fake cache
|
||
|
|
instead the sum of rss. Neither method is accurate.
|
||
|
|
|
||
|
|
Also skip the process scan, if the amount of memory available is above
|
||
|
|
the largest threshold set.
|
||
|
|
|
||
|
|
Signed-off-by: Arve Hjønnevåg <arve@android.com>
|
||
|
|
---
|
||
|
|
drivers/staging/android/lowmemorykiller.c | 35 +++++++++++++++++-----------
|
||
|
|
1 files changed, 21 insertions(+), 14 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/drivers/staging/android/lowmemorykiller.c b/drivers/staging/android/lowmemorykiller.c
|
||
|
|
index 3715d56..b9a2e84 100644
|
||
|
|
--- a/drivers/staging/android/lowmemorykiller.c
|
||
|
|
+++ b/drivers/staging/android/lowmemorykiller.c
|
||
|
|
@@ -71,23 +71,30 @@ static int lowmem_shrink(int nr_to_scan, gfp_t gfp_mask)
|
||
|
|
}
|
||
|
|
if(nr_to_scan > 0)
|
||
|
|
lowmem_print(3, "lowmem_shrink %d, %x, ofree %d, ma %d\n", nr_to_scan, gfp_mask, other_free, min_adj);
|
||
|
|
+ rem = global_page_state(NR_ACTIVE) + global_page_state(NR_INACTIVE);
|
||
|
|
+ if (nr_to_scan <= 0 || min_adj == OOM_ADJUST_MAX + 1) {
|
||
|
|
+ lowmem_print(5, "lowmem_shrink %d, %x, return %d\n", nr_to_scan, gfp_mask, rem);
|
||
|
|
+ return rem;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
read_lock(&tasklist_lock);
|
||
|
|
for_each_process(p) {
|
||
|
|
- if(p->oomkilladj >= 0 && p->mm) {
|
||
|
|
- tasksize = get_mm_rss(p->mm);
|
||
|
|
- if(nr_to_scan > 0 && tasksize > 0 && p->oomkilladj >= min_adj) {
|
||
|
|
- if(selected == NULL ||
|
||
|
|
- p->oomkilladj > selected->oomkilladj ||
|
||
|
|
- (p->oomkilladj == selected->oomkilladj &&
|
||
|
|
- tasksize > selected_tasksize)) {
|
||
|
|
- selected = p;
|
||
|
|
- selected_tasksize = tasksize;
|
||
|
|
- lowmem_print(2, "select %d (%s), adj %d, size %d, to kill\n",
|
||
|
|
- p->pid, p->comm, p->oomkilladj, tasksize);
|
||
|
|
- }
|
||
|
|
- }
|
||
|
|
- rem += tasksize;
|
||
|
|
+ if (p->oomkilladj < min_adj || !p->mm)
|
||
|
|
+ continue;
|
||
|
|
+ tasksize = get_mm_rss(p->mm);
|
||
|
|
+ if (tasksize <= 0)
|
||
|
|
+ continue;
|
||
|
|
+ if (selected) {
|
||
|
|
+ if (p->oomkilladj < selected->oomkilladj)
|
||
|
|
+ continue;
|
||
|
|
+ if (p->oomkilladj == selected->oomkilladj &&
|
||
|
|
+ tasksize <= selected_tasksize)
|
||
|
|
+ continue;
|
||
|
|
}
|
||
|
|
+ selected = p;
|
||
|
|
+ selected_tasksize = tasksize;
|
||
|
|
+ lowmem_print(2, "select %d (%s), adj %d, size %d, to kill\n",
|
||
|
|
+ p->pid, p->comm, p->oomkilladj, tasksize);
|
||
|
|
}
|
||
|
|
if(selected != NULL) {
|
||
|
|
lowmem_print(1, "send sigkill to %d (%s), adj %d, size %d\n",
|
||
|
|
--
|
||
|
|
1.6.2
|
||
|
|
|