From: Michal Hocko <mhocko@kernel.org>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
David Rientjes <rientjes@google.com>,
Vladimir Davydov <vdavydov@parallels.com>
Subject: Re: [PATCH 09/10] vhost, mm: make sure that oom_reaper doesn't reap memory read by vhost
Date: Tue, 23 Aug 2016 11:06:55 +0200 [thread overview]
Message-ID: <20160823090655.GA23583@dhcp22.suse.cz> (raw)
In-Reply-To: <20160823075555.GE23577@dhcp22.suse.cz>
On Tue 23-08-16 09:55:55, Michal Hocko wrote:
> On Tue 23-08-16 00:01:23, Michael S. Tsirkin wrote:
> [...]
> > Actually, vhost net calls out to tun which does regular copy_from_iter.
> > Returning 0 there will cause corrupted packets in the network: not a
> > huge deal, but ugly. And I don't think we want to annotate run and
> > macvtap as well.
>
> Hmm, OK, I wasn't aware of that path and being consistent here matters.
> If the vhost driver can interact with other subsystems then there is
> really no other option than hooking into the page fault path. Ohh well.
Here is a completely untested patch just for sanity check.
---
next prev parent reply other threads:[~2016-08-23 9:06 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-28 19:42 [RFC PATCH 0/10] fortify oom killer even more Michal Hocko
2016-07-28 19:42 ` [PATCH 01/10] mm,oom_reaper: Reduce find_lock_task_mm() usage Michal Hocko
2016-07-28 19:42 ` [PATCH 02/10] mm,oom_reaper: Do not attempt to reap a task twice Michal Hocko
2016-07-28 19:42 ` [PATCH 03/10] oom: keep mm of the killed task available Michal Hocko
2016-07-28 19:42 ` [PATCH 04/10] mm, oom: get rid of signal_struct::oom_victims Michal Hocko
2016-07-28 19:42 ` [PATCH 05/10] kernel, oom: fix potential pgd_lock deadlock from __mmdrop Michal Hocko
2016-07-28 19:42 ` [PATCH 06/10] oom, suspend: fix oom_killer_disable vs. pm suspend properly Michal Hocko
2016-07-28 19:42 ` [PATCH 07/10] mm, oom: enforce exit_oom_victim on current task Michal Hocko
2016-07-28 19:42 ` [PATCH 08/10] exit, oom: postpone exit_oom_victim to later Michal Hocko
2016-07-30 8:20 ` Tetsuo Handa
2016-07-31 9:35 ` Michal Hocko
2016-07-31 10:19 ` Michal Hocko
2016-08-01 10:46 ` Tetsuo Handa
2016-08-01 11:33 ` Michal Hocko
2016-08-02 10:32 ` Tetsuo Handa
2016-08-02 11:31 ` Michal Hocko
2016-07-28 19:42 ` [PATCH 09/10] vhost, mm: make sure that oom_reaper doesn't reap memory read by vhost Michal Hocko
2016-07-28 20:41 ` Michael S. Tsirkin
2016-07-29 6:04 ` Michal Hocko
2016-07-29 13:14 ` Michael S. Tsirkin
2016-07-29 13:35 ` Michal Hocko
2016-07-29 17:57 ` Michael S. Tsirkin
2016-07-31 9:44 ` Michal Hocko
2016-08-12 9:42 ` Michal Hocko
2016-08-12 13:21 ` Oleg Nesterov
2016-08-12 14:41 ` Michal Hocko
2016-08-12 16:05 ` Oleg Nesterov
2016-08-12 15:57 ` Paul E. McKenney
2016-08-12 16:09 ` Oleg Nesterov
2016-08-12 16:26 ` Paul E. McKenney
2016-08-12 16:23 ` Michal Hocko
2016-08-13 0:15 ` Michael S. Tsirkin
2016-08-14 8:41 ` Michal Hocko
2016-08-14 16:57 ` Michael S. Tsirkin
2016-08-14 23:06 ` Michael S. Tsirkin
2016-08-15 9:49 ` Michal Hocko
2016-08-17 16:58 ` Michal Hocko
2016-08-22 13:03 ` Michal Hocko
2016-08-22 21:01 ` Michael S. Tsirkin
2016-08-23 7:55 ` Michal Hocko
2016-08-23 9:06 ` Michal Hocko [this message]
2016-08-23 12:54 ` Michael S. Tsirkin
2016-08-24 16:42 ` Michal Hocko
2016-08-12 9:43 ` Michal Hocko
2016-07-29 17:07 ` Oleg Nesterov
2016-07-31 9:11 ` Michal Hocko
2016-07-28 19:42 ` [PATCH 10/10] oom, oom_reaper: allow to reap mm shared by the kthreads Michal Hocko
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