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
| ||
|
Date: Tue, 1 Jun 2010 13:36:45 -0700 (PDT) From: David Rientjes <rientjes@...gle.com> To: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> cc: LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, Oleg Nesterov <oleg@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Nick Piggin <npiggin@...e.de> Subject: Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD instead of !mm to skip kthreads On Mon, 31 May 2010, KOSAKI Motohiro wrote: > From: Oleg Nesterov <oleg@...hat.com> > Subject: oom: select_bad_process: check PF_KTHREAD instead of !mm to skip kthreads > > select_bad_process() thinks a kernel thread can't have ->mm != NULL, this > is not true due to use_mm(). > > Change the code to check PF_KTHREAD. > > Signed-off-by: Oleg Nesterov <oleg@...hat.com> > Acked-by: David Rientjes <rientjes@...gle.com> > Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> This is already pushed in my oom killer rewrite as patch 14/18 "check PF_KTHREAD instead of !mm to skip kthreads". This does not need to be merged immediately since it's not vital: use_mm() is only temporary state and these kthreads will once again be excluded when they call unuse_mm(). The worst case scenario here is that the oom killer will erroneously select one of these kthreads which cannot die and will need to reselect another task on its next call. -- 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/
Powered by blists - more mailing lists