linux-kernel - Re: [PATCH] mm: skip zombie in OOM-killer

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:	Sun,  6 Mar 2011 19:37:46 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Andrey Vagin <avagin@...nvz.org>
Cc:	kosaki.motohiro@...fujitsu.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: skip zombie in OOM-killer

> When we check that task has flag TIF_MEMDIE, we forgot check that
> it has mm. A task may be zombie and a parent may wait a memor.
> 
> v2: Check that task doesn't have mm one time and skip it immediately
> 
> Signed-off-by: Andrey Vagin <avagin@...nvz.org>

This seems incorrect. Do you have a reprodusable testcasae?
Your patch only care thread group leader state, but current code
care all thread in the process. Please look at oom_badness() and 
find_lock_task_mm(). 



--
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/