Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.34 as permitted sender) client-ip=23.128.96.34;
MIME-Version: 1.0
References: <20230904133321.104584-1-git@andred.net> <20231018111508.3913860-1-git@andred.net>
 <717fd97a-6d14-4dc9-808c-d752d718fb80@ddn.com> <4b0b46f29955956916765d8d615f96849c8ce3f7.camel@linaro.org>
 <fa3510f3-d3cc-45d2-b38e-e8717e2a9f83@ddn.com> <1b03f355170333f20ee20e47c5f355dc73d3a91c.camel@linaro.org>
 <9afc3152-5448-42eb-a7f4-4167fc8bc589@ddn.com> <5cd87a64-c506-46f2-9fed-ac8a74658631@ddn.com>
 <8ae8ce4d-6323-4160-848a-5e94895ae60e@leemhuis.info>
In-Reply-To: <8ae8ce4d-6323-4160-848a-5e94895ae60e@leemhuis.info>
From:   Miklos Szeredi <mszeredi@redhat.com>
Date:   Wed, 25 Oct 2023 15:17:09 +0200
Message-ID: <CAOssrKdvy9qTGSwwPVqYLAYYEk0jbqhGg4Lz=jEff7U58O4Yqw@mail.gmail.com>
Subject: Re: [PATCH v2] Revert "fuse: Apply flags2 only when userspace set the FUSE_INIT_EXT"
To:     Linux regressions mailing list <regressions@lists.linux.dev>
Cc:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Paul Lawrence <paullawrence@google.com>,
        Daniel Rosenberg <drosen@google.com>,
        Alessio Balsini <balsini@android.com>,
        Amir Goldstein <amir73il@gmail.com>,
        Bernd Schubert <bschubert@ddn.com>,
        =?UTF-8?Q?Andr=C3=A9_Draszik?= <andre.draszik@linaro.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

On Wed, Oct 25, 2023 at 1:30=E2=80=AFPM Linux regression tracking (Thorsten
Leemhuis) <regressions@leemhuis.info> wrote:

> Miklos, I'm wondering what the status here is. The description in the
> reverts Andr=C3=A9 sent[1] are maybe a bit vague[2], but it sounds a lot =
like
> he ran into a big regression that should be addressed somehow -- maybe
> with a revert. But it seems we haven't got any closer to that in all
> those ~7 weeks since the first revert was posted. But I might be missing
> something, hence a quick evaluation from your side would help me a lot
> here to understand the situation.

I don't think the Android use case counts as a regression.

If they'd use an unmodified upstream kernel, it would be a different case.

But they modify the kernel heavily, and AFAICS this breakage is
related to such a modification (as pointed out by Bernd upthread).

Andr=C3=A9 might want to clarify, but I've not seen any concrete real world
examples of regressions caused by this change outside of Android.

Thanks,
Miklos