linux-kernel - Re: [PATCH v3]mm/oom-kill: direct hardware access processes should get bonus

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 4 Jan 2011 17:28:33 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"Figo.zhang" <zhangtianfei@...dcoretech.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...l.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Figo.zhang" <figo1802@...il.com>,
	"rientjes@...gle.com" <rientjes@...gle.com>,
	Wu Fengguang <fengguang.wu@...el.com>
Subject: Re: [PATCH v3]mm/oom-kill: direct hardware access processes should
 get bonus

On Tue, 04 Jan 2011 15:51:44 +0800
"Figo.zhang" <zhangtianfei@...dcoretech.com> 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.
> 

Off topic.

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 /
                        totalpages;
==

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)



Thanks,
-Kame

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/