linux-kernel - Re: autofs: add autofs_parse

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Message-ID: <CADYN=9+HDwqAz-eLV7uVuMa+_+foj+_keSG-TmD2imkwVJ_mpQ@mail.gmail.com>
Date:   Fri, 20 Oct 2023 11:55:57 +0200
From:   Anders Roxell <anders.roxell@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org, linux-fsdevel@...r.kernel.org,
        autofs@...r.kernel.org, Ian Kent <raven@...maw.net>,
        "Bill O'Donnell" <bodonnel@...hat.com>,
        Christian Brauner <brauner@...nel.org>,
        Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: autofs: add autofs_parse_fd()

On Fri, 20 Oct 2023 at 08:37, Arnd Bergmann <arnd@...db.de> wrote:
>
> On Thu, Oct 19, 2023, at 17:27, Naresh Kamboju wrote:
> > The qemu-x86_64 and x86_64 booting with 64bit kernel and 32bit rootfs we call
> > it as compat mode boot testing. Recently it started to failed to get login
> > prompt.
> >
> > We have not seen any kernel crash logs.
> >
> > Anders, bisection is pointing to first bad commit,
> > 546694b8f658 autofs: add autofs_parse_fd()
> >
> > Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> > Reported-by: Anders Roxell <anders.roxell@...aro.org>
>
> I tried to find something in that commit that would be different
> in compat mode, but don't see anything at all -- this appears
> to be just a simple refactoring of the code, unlike the commits
> that immediately follow it and that do change the mount
> interface.
>
> Unfortunately this makes it impossible to just revert the commit
> on top of linux-next. Can you double-check your bisection by
> testing 546694b8f658 and the commit before it again?

I tried these two patches again:
546694b8f658 ("autofs: add autofs_parse_fd()") - doesn't boot
bc69fdde0ae1 ("autofs: refactor autofs_prepare_pipe()") - boots

>
> What are the exact mount options you pass to autofs in your fstab?

cat /etc/fstab
# UNCONFIGURED FSTAB FOR BASE SYSTEM

Cheers,
Anders