linux-kernel - Re: [RFC PATCH] mm, oom: distinguish blockable mode for mmu notifiers

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Message-ID: <20180711111318.GL20050@dhcp22.suse.cz>
Date:   Wed, 11 Jul 2018 13:13:18 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Mike Marciniszyn <mike.marciniszyn@...el.com>,
        Dennis Dalessandro <dennis.dalessandro@...el.com>,
        Sudeep Dutt <sudeep.dutt@...el.com>,
        Ashutosh Dixit <ashutosh.dixit@...el.com>,
        Dimitri Sivanich <sivanich@....com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Andrea Arcangeli <aarcange@...hat.com>, kvm@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, linux-rdma@...r.kernel.org,
        xen-devel@...ts.xenproject.org, linux-mm@...ck.org,
        David Rientjes <rientjes@...gle.com>,
        Felix Kuehling <felix.kuehling@....com>
Subject: Re: [RFC PATCH] mm, oom: distinguish blockable mode for mmu notifiers

On Wed 11-07-18 13:14:47, Leon Romanovsky wrote:
> On Wed, Jul 11, 2018 at 11:03:53AM +0200, Michal Hocko wrote:
> > On Tue 10-07-18 19:20:20, Leon Romanovsky wrote:
> > > On Tue, Jul 10, 2018 at 04:14:10PM +0200, Michal Hocko wrote:
> > > > On Tue 10-07-18 16:40:40, Leon Romanovsky wrote:
> > > > > On Mon, Jul 09, 2018 at 02:29:08PM +0200, Michal Hocko wrote:
> > > > > > On Wed 27-06-18 09:44:21, Michal Hocko wrote:
> > > > > > > This is the v2 of RFC based on the feedback I've received so far. The
> > > > > > > code even compiles as a bonus ;) I haven't runtime tested it yet, mostly
> > > > > > > because I have no idea how.
> > > > > > >
> > > > > > > Any further feedback is highly appreciated of course.
> > > > > >
> > > > > > Any other feedback before I post this as non-RFC?
> > > > >
> > > > > From mlx5 perspective, who is primary user of umem_odp.c your change looks ok.
> > > >
> > > > Can I assume your Acked-by?
> > >
> > > I didn't have a chance to test it because it applies on our rdma-next, but
> > > fails to compile.
> >
> > What is the compilation problem? Is it caused by the patch or some other
> > unrelated changed?
> 
> Thanks for pushing me to take a look on it.
> Your patch needs the following hunk to properly compile at least on my system.

I suspect you were trying the original version. I've posted an updated
patch here http://lkml.kernel.org/r/20180627074421.GF32348@dhcp22.suse.cz
and all these issues should be fixed there. Including many other fixes.

Could you have a look at that one please?
-- 
Michal Hocko
SUSE Labs