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Date:   Thu, 7 Apr 2022 17:46:45 +0200
From:   "sebastian.fricke@collabora.com" <sebastian.fricke@collabora.com>
To:     Anna Schumaker <schumaker.anna@gmail.com>
Cc:     Muchun Song <songmuchun@bytedance.com>, NeilBrown <neilb@suse.de>,
        Trond Myklebust <trondmy@hammerspace.com>,
        "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>
Subject: Re: Possible NFS4 regression on 5.18-rc1
Message-ID: <20220407154645.fhnog3fvubfgeglr@basti-XPS-13-9310>
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Hey Ann, Trond, Neil & Muchun,

On 07.04.2022 10:00, Anna Schumaker wrote:
>I started seeing the same problem when I rebased on rc1, and the
>suggested patch fixes it for me.

Thanks, yes that patch fixes the problem for me as well.

>
>Anna

Greetings,
Sebastian
>
>On Wed, Apr 6, 2022 at 11:23 PM Muchun Song <songmuchun@bytedance.com> wrote:
>>
>> On Thu, Apr 7, 2022 at 8:38 AM NeilBrown <neilb@suse.de> wrote:
>> >
>> > On Thu, 07 Apr 2022, Trond Myklebust wrote:
>> > > On Wed, 2022-04-06 at 16:25 +0200, Sebastian Fricke wrote:
>> > > > [You don't often get email from sebastian.fricke@collabora.com. Learn
>> > > > why this is important at
>> > > > http://aka.ms/LearnAboutSenderIdentification.]
>> > > >
>> > > > Hello folks,
>> > > >
>> > > > I am currently developing a V4L2 driver with support on GStreamer,
>> > > > for
>> > > > that purpose I am mounting the GStreamer repository via NFS from my
>> > > > development machine to the target ARM64 hardware.
>> > > >
>> > > > I just switched to the latest kernel and got a sudden hang up of my
>> > > > system.
>> > > > What I did was a rebase of the GStreamer repository and then I wanted
>> > > > to
>> > > > build it with ninja on the target, this failed with a segmentation
>> > > > fault:
>> > > > ```
>> > > > gstreamer| Configuring libgstreamer-1.0.so.0.2100.0-gdb.py using
>> > > > configurat=
>> > > > ion
>> > > > Segmentation fault
>> > ....
>> >
>> > > > [ 4595.209552] pc : list_lru_add+0xd4/0x180
>> > > > [ 4595.209907] lr : list_lru_add+0x15c/0x180
>> >
>> > This is almost certainly fixed by the patch at
>> >
>> > https://lore.kernel.org/all/164876616694.25542.14010655277238655246@noble.neil.brown.name/
>> >
>> > which almost landed in -mm, but didn't quite.
>> >
>> > The subsequent email
>> >
>> > https://lore.kernel.org/all/CAMZfGtUMyag7MHxmg7E1_xmyZ7NDPt62e-qXbqa8nJHFC72=3w@mail.gmail.com/
>> >
>> > suggests a one-line change.
>> >
>> > Trond: maybe you could queue this?
>> >
>> Hi NeilBrown,
>>
>> The complete patch could be found here. Please
>> queue this one.
>>
>> [1] https://lore.kernel.org/all/20220401025905.49771-1-songmuchun@bytedance.com/
>>
>> Thanks.