From: Andrew Morton <akpm@linux-foundation.org>
To: Michal Hocko <mhocko@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, "David (ChunMing) Zhou" <David1.Zhou@amd.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"David Airlie" <airlied@linux.ie>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
"Doug Ledford" <dledford@redhat.com>,
"Jason Gunthorpe" <jgg@ziepe.ca>,
"Mike Marciniszyn" <mike.marciniszyn@intel.com>,
"Dennis Dalessandro" <dennis.dalessandro@intel.com>,
"Sudeep Dutt" <sudeep.dutt@intel.com>,
"Ashutosh Dixit" <ashutosh.dixit@intel.com>,
"Dimitri Sivanich" <sivanich@sgi.com>,
"Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
"Juergen Gross" <jgross@suse.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Andrea Arcangeli" <aarcange@redhat.com>,
"Felix Kuehling" <felix.kuehling@amd.com>,
kvm@vger.kernel.org, amd-gfx@lists.freedesktop.org,
dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
linux-rdma@vger.kernel.org, xen-devel@lists.xenproject.org,
"Christian König" <christian.koenig@amd.com>,
"David Rientjes" <rientjes@google.com>,
"Leon Romanovsky" <leonro@mellanox.com>
Subject: Re: [PATCH] mm, oom: distinguish blockable mode for mmu notifiers
Date: Fri, 20 Jul 2018 16:01:25 -0700 [thread overview]
Message-ID: <20180720160125.f3cda46f317a1ff5a2342549@linux-foundation.org> (raw)
In-Reply-To: <20180717081201.GB16803@dhcp22.suse.cz>
On Tue, 17 Jul 2018 10:12:01 +0200 Michal Hocko <mhocko@kernel.org> wrote:
> > Any suggestions regarding how the driver developers can test this code
> > path? I don't think we presently have a way to fake an oom-killing
> > event? Perhaps we should add such a thing, given the problems we're
> > having with that feature.
>
> The simplest way is to wrap an userspace code which uses these notifiers
> into a memcg and set the hard limit to hit the oom. This can be done
> e.g. after the test faults in all the mmu notifier managed memory and
> set the hard limit to something really small. Then we are looking for a
> proper process tear down.
Chances are, some of the intended audience don't know how to do this
and will either have to hunt down a lot of documentation or will just
not test it. But we want them to test it, so a little worked step-by-step
example would help things along please.
next prev parent reply other threads:[~2018-07-20 23:01 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-16 11:50 [PATCH] mm, oom: distinguish blockable mode for mmu notifiers Michal Hocko
2018-07-16 23:12 ` Andrew Morton
2018-07-17 4:03 ` Leon Romanovsky
2018-07-17 8:12 ` Michal Hocko
2018-07-20 23:01 ` Andrew Morton [this message]
2018-07-23 8:43 ` Michal Hocko
2018-07-19 9:12 ` Michal Hocko
2018-07-21 0:09 ` Andrew Morton
2018-07-23 7:03 ` Michal Hocko
2018-07-23 7:11 ` Michal Hocko
2018-07-23 8:11 ` Michal Hocko
2018-07-24 14:17 ` Michal Hocko
2018-07-24 19:53 ` Andrew Morton
2018-07-25 6:17 ` Michal Hocko
2018-07-24 21:07 ` David Rientjes
2018-07-25 6:13 ` Michal Hocko
2018-08-24 10:54 ` Tetsuo Handa
2018-08-24 11:32 ` Michal Hocko
2018-08-24 11:43 ` Christian König
2018-08-24 11:52 ` Michal Hocko
2018-08-24 11:57 ` Christian König
2018-08-24 12:03 ` Michal Hocko
2018-08-24 12:18 ` Christian König
2018-08-24 12:33 ` Michal Hocko
2018-08-24 12:52 ` Christian König
2018-08-24 13:01 ` Michal Hocko
2018-08-24 13:10 ` Christian König
2018-08-24 13:24 ` Michal Hocko
2018-08-24 13:28 ` Christian König
2018-08-24 13:40 ` Michal Hocko
2018-08-24 13:44 ` Christian König
2018-08-24 13:52 ` Michal Hocko
2018-08-26 8:40 ` Tetsuo Handa
2018-08-27 7:41 ` Christian König
2018-09-06 22:46 ` Tetsuo Handa
2018-08-24 15:08 ` Jerome Glisse
2018-08-24 11:36 ` Michal Hocko
2018-08-24 13:02 ` Tetsuo Handa
2018-08-24 13:32 ` Michal Hocko
2018-08-24 14:52 ` Tetsuo Handa
2018-08-24 15:12 ` Jerome Glisse
2018-08-24 16:40 ` Michal Hocko
2018-08-24 17:33 ` Jerome Glisse
2018-08-24 16:38 ` Michal Hocko
2018-08-24 14:40 ` Jerome Glisse
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