Re: [PATCH v3]mm/oom-kill: direct hardware access processes shouldget bonus
From: KAMEZAWA Hiroyuki
Date: Tue Jan 04 2011 - 03:34:39 EST
On Tue, 04 Jan 2011 15:51:44 +0800
"Figo.zhang" <zhangtianfei@xxxxxxxxxxxxxxxx> wrote:
> i had send the patch to protect the hardware access processes for
> oom-killer before, but rientjes have not agree with me.
> but today i catch log from my desktop. oom-killer have kill my "minicom"
> and "Xorg". so i think it should add protection about it.
In this log, I found
> > Jan 4 15:22:55 figo-desktop kernel: Free swap = -1636kB
> > Jan 4 15:22:55 figo-desktop kernel: Total swap = 0kB
> > Jan 4 15:22:55 figo-desktop kernel: 515070 pages RAM
... This means total_swap_pages = 0 while pages are read-in at swapoff.
Let's see 'points' for oom
points = (get_mm_rss(p->mm) + get_mm_counter(p->mm, MM_SWAPENTS)) * 1000 /
Here, totalpages = total_ram + total_swap but totalswap is 0 here.
So, points can be > 1000, easily.
(This seems not to be related to the Xorg's death itself)
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