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 22:04:53 +0100 [thread overview]
Message-ID: <CAK8P3a2u=WtQ_98F2934QEZM19YaDPkfzQzHoiCgnaBYi3Qw3g@mail.gmail.com> (raw)
In-Reply-To: <20210106172033.GA2165@willie-the-truck>
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:
>
> and the resulting Image is here:
>
> https://mirrors.edge.kernel.org/pub/linux/kernel/people/will/bugs/rmk/Image-5.9.0
>
> 3. Using that kernel, I boot into a 64-bit Debian 10 filesystem and open a
> couple of terminals over SSH.
>
> 4. In one terminal, I run:
>
> $ while (true); do find /var /usr /bin /sbin -type f -print0 | xargs -0
> md5sum > /dev/null; echo 2 | sudo tee /proc/sys/vm/drop_caches; done
>
> (note that sudo will prompt you for a password on the first iteration)
>
> 5. In the other terminal, I run:
>
> $ while (true); do ./hackbench ; sleep 1; done
>
> where hackbench is built from:
>
> https://people.redhat.com/mingo/cfs-scheduler/tools/hackbench.c
>
> and compiled according to comment in the source code.
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.
arnd
next prev parent reply other threads:[~2021-01-06 21:05 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-05 15:47 Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues Russell King - ARM Linux admin
2021-01-05 18:27 ` Darrick J. Wong
2021-01-05 19:50 ` Russell King - ARM Linux admin
2021-01-06 11:53 ` Mark Rutland
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 17:46 ` Russell King - ARM Linux admin
2021-01-06 21:04 ` Arnd Bergmann [this message]
2021-01-06 22:00 ` Arnd Bergmann
2021-01-06 22:32 ` 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 13:16 ` Arnd Bergmann
2021-01-07 13:37 ` Russell King - ARM Linux admin
2021-01-07 16:27 ` Theodore Ts'o
2021-01-07 17:00 ` Florian Weimer
2021-01-07 21:48 ` Arnd Bergmann
2021-01-07 22:14 ` Russell King - ARM Linux admin
2021-01-07 22:41 ` Eric Biggers
2021-01-08 8:21 ` Ard Biesheuvel
2021-01-07 22:27 ` Eric Biggers
2021-01-07 23:53 ` Darrick J. Wong
2021-01-08 8:05 ` Arnd Bergmann
2021-01-08 9:13 ` Peter Zijlstra
2021-01-08 10:31 ` Pavel Machek
2021-01-07 21:20 ` Arnd Bergmann
2021-01-08 9:21 ` Peter Zijlstra
2021-01-08 9:26 ` Will Deacon
2021-01-08 20:02 ` Linus Torvalds
2021-01-08 20:22 ` Arnd Bergmann
2021-01-08 21:20 ` Nick Desaulniers
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 13:46 ` David Laight
2021-01-12 17:28 ` Linus Torvalds
2021-01-14 13:13 ` Lukas Wunner
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