android/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Staging: android: lowmemorykiller: Only iterate over process list when needed.

Browse Source 
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>
Cc: David Rientjes <rientjes@google.com>
Cc: San Mehat <san@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Arve Hjønnevåg
2009-05-11 15:45:09 -07:00
committed by Greg Kroah-Hartman
parent 4900dea69f
commit f501d00144
1 changed files with 21 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/staging/android/lowmemorykiller.c
View File

@ -71,24 +71,31 @@ 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) {
if (p->oomkilladj < min_adj || !p->mm)
continue;
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)) {
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);
}
}
rem += tasksize;
}
}
if(selected != NULL) {
lowmem_print(1, "send sigkill to %d (%s), adj %d, size %d\n",
selected->pid, selected->comm,