All of lore.kernel.org
 help / color / mirror / Atom feed
From: Arnd Bergmann <arnd@kernel.org>
To: Will Deacon <will@kernel.org>
Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk>,
	Mark Rutland <mark.rutland@arm.com>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"Theodore Ts'o" <tytso@mit.edu>,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	Ext4 Developers List <linux-ext4@vger.kernel.org>
Subject: Re: Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues
Date: Wed, 6 Jan 2021 23:00:45 +0100	[thread overview]
Message-ID: <CAK8P3a3E=+SnbAR=7B_DHX38FY5S=+HjSHpkzTdGWkJKOQ3kHg@mail.gmail.com> (raw)
In-Reply-To: <CAK8P3a2u=WtQ_98F2934QEZM19YaDPkfzQzHoiCgnaBYi3Qw3g@mail.gmail.com>

On Wed, Jan 6, 2021 at 10:04 PM Arnd Bergmann <arnd@kernel.org> wrote:
> On Wed, Jan 6, 2021 at 6:22 PM Will Deacon <will@kernel.org> wrote:
> > On Wed, Jan 06, 2021 at 01:52:53PM +0000, Russell King - ARM Linux admin wrote:
>
> I tried the Image-5.9.0 on a virtual machine with seven CPUs (two clusters)
> running in an M1 mac mini and ran these commands inside.
>
> > With that, I see the following after ten seconds or so:
> >
> >   EXT4-fs error (device sda2): ext4_lookup:1707: inode #674497: comm md5sum: iget: checksum invalid
> >
> > Russell, Mark -- does this recipe explode reliably for you too?
>
> Negative unfortunately -- no checksum mismatch so far, with 10 minutes
> elapsed. I'll keep it running a bit longer.

I managed to trigger the checksum mismatch once now, after around 40
minutes, with a second run going for 20 minutes without mismatch.

So it's not easily reproducible for me, but it does help to rule out
at least some of the hardware specific theories -- it's not just the
Cortex-A72, nor the CCI doing something weird, as neither of
them are in use here.

This is the output I got:

EXT4-fs error (device vda2): ext4_lookup:1707: inode #1185501: comm
md5sum: iget: checksum invalid
Aborting journal on device vda2-8.
EXT4-fs error (device vda2): ext4_journal_check_start:83: Detected
aborted journal
EXT4-fs (vda2): Remounting filesystem read-only
EXT4-fs (vda2): Remounting filesystem read-only
EXT4-fs error (device vda2): ext4_journal_check_start:83: Detected
aborted journal

      Arnd

WARNING: multiple messages have this Message-ID
From: Arnd Bergmann <arnd@kernel.org>
To: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
	Theodore Ts'o <tytso@mit.edu>,
	Russell King - ARM Linux admin <linux@armlinux.org.uk>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	Ext4 Developers List <linux-ext4@vger.kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues
Date: Wed, 6 Jan 2021 23:00:45 +0100	[thread overview]
Message-ID: <CAK8P3a3E=+SnbAR=7B_DHX38FY5S=+HjSHpkzTdGWkJKOQ3kHg@mail.gmail.com> (raw)
In-Reply-To: <CAK8P3a2u=WtQ_98F2934QEZM19YaDPkfzQzHoiCgnaBYi3Qw3g@mail.gmail.com>

On Wed, Jan 6, 2021 at 10:04 PM Arnd Bergmann <arnd@kernel.org> wrote:
> On Wed, Jan 6, 2021 at 6:22 PM Will Deacon <will@kernel.org> wrote:
> > On Wed, Jan 06, 2021 at 01:52:53PM +0000, Russell King - ARM Linux admin wrote:
>
> I tried the Image-5.9.0 on a virtual machine with seven CPUs (two clusters)
> running in an M1 mac mini and ran these commands inside.
>
> > With that, I see the following after ten seconds or so:
> >
> >   EXT4-fs error (device sda2): ext4_lookup:1707: inode #674497: comm md5sum: iget: checksum invalid
> >
> > Russell, Mark -- does this recipe explode reliably for you too?
>
> Negative unfortunately -- no checksum mismatch so far, with 10 minutes
> elapsed. I'll keep it running a bit longer.

I managed to trigger the checksum mismatch once now, after around 40
minutes, with a second run going for 20 minutes without mismatch.

So it's not easily reproducible for me, but it does help to rule out
at least some of the hardware specific theories -- it's not just the
Cortex-A72, nor the CCI doing something weird, as neither of
them are in use here.

This is the output I got:

EXT4-fs error (device vda2): ext4_lookup:1707: inode #1185501: comm
md5sum: iget: checksum invalid
Aborting journal on device vda2-8.
EXT4-fs error (device vda2): ext4_journal_check_start:83: Detected
aborted journal
EXT4-fs (vda2): Remounting filesystem read-only
EXT4-fs (vda2): Remounting filesystem read-only
EXT4-fs error (device vda2): ext4_journal_check_start:83: Detected
aborted journal

      Arnd

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2021-01-06 22:01 UTC|newest]

Thread overview: 73+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-05 15:47 Russell King - ARM Linux admin
2021-01-05 15:47 ` Russell King - ARM Linux admin
2021-01-05 18:27 ` Darrick J. Wong
2021-01-05 18:27   ` Darrick J. Wong
2021-01-05 19:50   ` Russell King - ARM Linux admin
2021-01-05 19:50     ` Russell King - ARM Linux admin
2021-01-06 11:53 ` Mark Rutland
2021-01-06 11:53   ` Mark Rutland
2021-01-06 12:13   ` Russell King - ARM Linux admin
2021-01-06 12:13     ` Russell King - ARM Linux admin
2021-01-06 13:52   ` Russell King - ARM Linux admin
2021-01-06 17:20     ` Will Deacon
2021-01-06 17:20       ` Will Deacon
2021-01-06 17:46       ` Russell King - ARM Linux admin
2021-01-06 17:46         ` Russell King - ARM Linux admin
2021-01-06 21:04       ` Arnd Bergmann
2021-01-06 21:04         ` Arnd Bergmann
2021-01-06 22:00         ` Arnd Bergmann [this message]
2021-01-06 22:00           ` Arnd Bergmann
2021-01-06 22:32       ` Russell King - ARM Linux admin
2021-01-06 22:32         ` Russell King - ARM Linux admin
2021-01-07 11:18         ` Russell King - ARM Linux admin
2021-01-07 11:18           ` Russell King - ARM Linux admin
2021-01-07 12:45           ` Russell King - ARM Linux admin
2021-01-07 12:45             ` Russell King - ARM Linux admin
2021-01-07 13:16             ` Arnd Bergmann
2021-01-07 13:16               ` Arnd Bergmann
2021-01-07 13:37               ` Russell King - ARM Linux admin
2021-01-07 13:37                 ` Russell King - ARM Linux admin
2021-01-07 16:27                 ` Theodore Ts'o
2021-01-07 16:27                   ` Theodore Ts'o
2021-01-07 17:00                   ` Florian Weimer
2021-01-07 17:00                     ` Florian Weimer
2021-01-07 21:48                   ` Arnd Bergmann
2021-01-07 21:48                     ` Arnd Bergmann
2021-01-07 22:14                     ` Russell King - ARM Linux admin
2021-01-07 22:14                       ` Russell King - ARM Linux admin
2021-01-07 22:41                       ` Eric Biggers
2021-01-07 22:41                         ` Eric Biggers
2021-01-08  8:21                         ` Ard Biesheuvel
2021-01-08  8:21                           ` Ard Biesheuvel
2021-01-07 22:27                     ` Eric Biggers
2021-01-07 22:27                       ` Eric Biggers
2021-01-07 23:53                       ` Darrick J. Wong
2021-01-07 23:53                         ` Darrick J. Wong
2021-01-08  8:05                         ` Arnd Bergmann
2021-01-08  8:05                           ` Arnd Bergmann
2021-01-08  9:13                   ` Peter Zijlstra
2021-01-08  9:13                     ` Peter Zijlstra
2021-01-08 10:31                   ` Pavel Machek
2021-01-08 10:31                     ` Pavel Machek
2021-01-07 21:20                 ` Arnd Bergmann
2021-01-07 21:20                   ` Arnd Bergmann
2021-01-08  9:21                   ` Peter Zijlstra
2021-01-08  9:21                     ` Peter Zijlstra
2021-01-08  9:26                     ` Will Deacon
2021-01-08  9:26                       ` Will Deacon
2021-01-08 20:02                       ` Linus Torvalds
2021-01-08 20:02                         ` Linus Torvalds
2021-01-08 20:22                         ` Arnd Bergmann
2021-01-08 20:22                           ` Arnd Bergmann
2021-01-08 21:20                           ` Nick Desaulniers
2021-01-08 21:20                             ` Nick Desaulniers
2021-01-08 20:29                         ` Russell King - ARM Linux admin
2021-01-08 20:29                           ` Russell King - ARM Linux admin
2021-01-12 13:20                         ` Lukas Wunner
2021-01-12 13:31                           ` Florian Weimer
2021-01-12 13:31                             ` Florian Weimer
2021-01-12 13:46                             ` David Laight
2021-01-12 13:46                               ` David Laight
2021-01-12 17:28                           ` Linus Torvalds
2021-01-12 17:28                             ` Linus Torvalds
2021-01-14 13:13                             ` Lukas Wunner

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAK8P3a3E=+SnbAR=7B_DHX38FY5S=+HjSHpkzTdGWkJKOQ3kHg@mail.gmail.com' \
    --to=arnd@kernel.org \
    --cc=adilger.kernel@dilger.ca \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-ext4@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux@armlinux.org.uk \
    --cc=mark.rutland@arm.com \
    --cc=tytso@mit.edu \
    --cc=will@kernel.org \
    --subject='Re: Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.