linux-kernel - Re: [BUG BISECT] bug mm/vmalloc.c:470 (mm/vmalloc.c: get rid of one single unlink

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Message-ID: <CAA42JLZa4OgiEYk7d+gM9pu-gvVbOfQj3-VfEb8kvx538-atew@mail.gmail.com>
Date:   Mon, 3 Jun 2019 12:19:25 -0700
From:   Dexuan-Linux Cui <dexuan.linux@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Uladzislau Rezki <urezki@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>, linux-mm@...ck.org,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Hillf Danton <hdanton@...a.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tejun Heo <tj@...nel.org>, Andrei Vagin <avagin@...il.com>,
        Dexuan Cui <decui@...rosoft.com>, v-lide@...rosoft.com
Subject: Re: [BUG BISECT] bug mm/vmalloc.c:470 (mm/vmalloc.c: get rid of one
 single unlink_va() when merge)

On Mon, Jun 3, 2019 at 7:37 AM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On Mon, 3 Jun 2019 at 16:32, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> >
> > Hi Krzysztof,
> >
> > On Mon, 3 Jun 2019 16:10:40 +0200 Krzysztof Kozlowski <krzk@...nel.org> wrote:
> > >
> > > Indeed it looks like effect of merge conflict resolution or applying.
> > > When I look at MMOTS, it is the same as yours:
> > > http://git.cmpxchg.org/cgit.cgi/linux-mmots.git/commit/?id=b77b8cce67f246109f9d87417a32cd38f0398f2f
> > >
> > > However in linux-next it is different.
> > >
> > > Stephen, any thoughts?
> >
> > Have you had a look at today's linux-next?  It looks correct in
> > there.  Andrew updated his patch series over the weekend.
>
> Yes, I am looking at today's next. Both the source code and the commit
> 728e0fbf263e3ed359c10cb13623390564102881 have wrong "if (merged)" (put
> in wrong hunk).
>
> Best regards,
> Krzysztof

FYI, we also see the issue in our x86 VM running on Hyper-V.

Thanks,
Dexuan