From: Catalin Marinas <catalin.marinas@arm.com>
To: David Laight <David.Laight@ACULAB.COM>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Joao Pinto <Joao.Pinto@synopsys.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
linux-pci <linux-pci@vger.kernel.org>,
Will Deacon <will.deacon@arm.com>,
Russell King <linux@armlinux.org.uk>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
'Mikulas Patocka' <mpatocka@redhat.com>,
Matt Sealey <neko@bakuhatsu.net>,
Jingoo Han <jingoohan1@gmail.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: framebuffer corruption due to overlapping stp instructions on arm64
Date: Wed, 8 Aug 2018 15:50:17 +0100 [thread overview]
Message-ID: <20180808145017.GE24736@iMac.local> (raw)
In-Reply-To: <19c70d2a0b224db78f72dd316ad006b8@AcuMS.aculab.com>
On Wed, Aug 08, 2018 at 02:26:11PM +0000, David Laight wrote:
> From: Mikulas Patocka
> > Sent: 08 August 2018 14:47
> ...
> > The problem on ARM is that I see data corruption when the overlapping
> > unaligned writes are done just by a single core.
>
> Is this a sequence of unaligned writes (that shouldn't modify the
> same physical locations) or an aligned write followed by an
> unaligned one that updates part of the earlier write.
> (Or the opposite order?)
In the memcpy() case, there can be a sequence of unaligned writes but
they would not modify the same byte (so no overlapping address at the
byte level).
--
Catalin
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: framebuffer corruption due to overlapping stp instructions on arm64
Date: Wed, 8 Aug 2018 15:50:17 +0100 [thread overview]
Message-ID: <20180808145017.GE24736@iMac.local> (raw)
In-Reply-To: <19c70d2a0b224db78f72dd316ad006b8@AcuMS.aculab.com>
On Wed, Aug 08, 2018 at 02:26:11PM +0000, David Laight wrote:
> From: Mikulas Patocka
> > Sent: 08 August 2018 14:47
> ...
> > The problem on ARM is that I see data corruption when the overlapping
> > unaligned writes are done just by a single core.
>
> Is this a sequence of unaligned writes (that shouldn't modify the
> same physical locations) or an aligned write followed by an
> unaligned one that updates part of the earlier write.
> (Or the opposite order?)
In the memcpy() case, there can be a sequence of unaligned writes but
they would not modify the same byte (so no overlapping address at the
byte level).
--
Catalin
WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: David Laight <David.Laight@ACULAB.COM>
Cc: 'Mikulas Patocka' <mpatocka@redhat.com>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Joao Pinto <Joao.Pinto@synopsys.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Will Deacon <will.deacon@arm.com>,
Russell King <linux@armlinux.org.uk>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Matt Sealey <neko@bakuhatsu.net>,
linux-pci <linux-pci@vger.kernel.org>,
Jingoo Han <jingoohan1@gmail.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: framebuffer corruption due to overlapping stp instructions on arm64
Date: Wed, 8 Aug 2018 15:50:17 +0100 [thread overview]
Message-ID: <20180808145017.GE24736@iMac.local> (raw)
In-Reply-To: <19c70d2a0b224db78f72dd316ad006b8@AcuMS.aculab.com>
On Wed, Aug 08, 2018 at 02:26:11PM +0000, David Laight wrote:
> From: Mikulas Patocka
> > Sent: 08 August 2018 14:47
> ...
> > The problem on ARM is that I see data corruption when the overlapping
> > unaligned writes are done just by a single core.
>
> Is this a sequence of unaligned writes (that shouldn't modify the
> same physical locations) or an aligned write followed by an
> unaligned one that updates part of the earlier write.
> (Or the opposite order?)
In the memcpy() case, there can be a sequence of unaligned writes but
they would not modify the same byte (so no overlapping address at the
byte level).
--
Catalin
next prev parent reply other threads:[~2018-08-08 14:50 UTC|newest]
Thread overview: 238+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-02 19:31 framebuffer corruption due to overlapping stp instructions on arm64 Mikulas Patocka
2018-08-02 19:31 ` Mikulas Patocka
[not found] ` <CAHCPf3tFGqkYEcWNN4LaWThw_rVqT316pzLv6T7RfxwO-eZ0EA@mail.gmail.com>
2018-08-03 6:35 ` Mikulas Patocka
2018-08-03 6:35 ` Mikulas Patocka
2018-08-03 7:16 ` Ard Biesheuvel
2018-08-03 7:16 ` Ard Biesheuvel
2018-08-03 9:41 ` Will Deacon
2018-08-03 9:41 ` Will Deacon
2018-08-03 17:09 ` Mikulas Patocka
2018-08-03 17:09 ` Mikulas Patocka
2018-08-03 17:09 ` Mikulas Patocka
2018-08-03 17:32 ` Sinan Kaya
2018-08-03 17:32 ` Sinan Kaya
2018-08-03 17:32 ` Sinan Kaya
2018-08-03 17:33 ` Ard Biesheuvel
2018-08-03 17:33 ` Ard Biesheuvel
2018-08-03 17:33 ` Ard Biesheuvel
2018-08-03 18:25 ` Mikulas Patocka
2018-08-03 18:25 ` Mikulas Patocka
2018-08-03 18:25 ` Mikulas Patocka
2018-08-03 20:44 ` Matt Sealey
2018-08-03 20:44 ` Matt Sealey
2018-08-03 20:44 ` Matt Sealey
2018-08-03 21:20 ` Ard Biesheuvel
2018-08-03 21:20 ` Ard Biesheuvel
2018-08-03 21:20 ` Ard Biesheuvel
2018-08-06 10:25 ` Mikulas Patocka
2018-08-06 10:25 ` Mikulas Patocka
2018-08-06 10:25 ` Mikulas Patocka
2018-08-06 12:42 ` Robin Murphy
2018-08-06 12:42 ` Robin Murphy
2018-08-06 12:42 ` Robin Murphy
2018-08-06 12:53 ` Ard Biesheuvel
2018-08-06 12:53 ` Ard Biesheuvel
2018-08-06 12:53 ` Ard Biesheuvel
2018-08-06 13:41 ` Marcin Wojtas
2018-08-06 13:41 ` Marcin Wojtas
2018-08-06 13:41 ` Marcin Wojtas
2018-08-06 13:48 ` Ard Biesheuvel
2018-08-06 13:48 ` Ard Biesheuvel
2018-08-06 13:48 ` Ard Biesheuvel
2018-08-06 14:07 ` Marcin Wojtas
2018-08-06 14:07 ` Marcin Wojtas
2018-08-06 14:07 ` Marcin Wojtas
2018-08-06 14:13 ` Mikulas Patocka
2018-08-06 14:13 ` Mikulas Patocka
2018-08-06 14:13 ` Mikulas Patocka
2018-08-06 15:47 ` Ard Biesheuvel
2018-08-06 15:47 ` Ard Biesheuvel
2018-08-06 15:47 ` Ard Biesheuvel
2018-08-06 17:09 ` Mikulas Patocka
2018-08-06 17:09 ` Mikulas Patocka
2018-08-06 17:09 ` Mikulas Patocka
2018-08-06 17:21 ` Ard Biesheuvel
2018-08-06 17:21 ` Ard Biesheuvel
2018-08-06 17:21 ` Ard Biesheuvel
2018-08-06 19:54 ` Mikulas Patocka
2018-08-06 19:54 ` Mikulas Patocka
2018-08-06 19:54 ` Mikulas Patocka
2018-08-06 20:11 ` Ard Biesheuvel
2018-08-06 20:11 ` Ard Biesheuvel
2018-08-06 20:11 ` Ard Biesheuvel
2018-08-06 20:31 ` Mikulas Patocka
2018-08-06 20:31 ` Mikulas Patocka
2018-08-06 20:31 ` Mikulas Patocka
2018-08-07 16:40 ` Marcin Wojtas
2018-08-07 16:40 ` Marcin Wojtas
2018-08-07 16:40 ` Marcin Wojtas
2018-08-07 17:39 ` Mikulas Patocka
2018-08-07 17:39 ` Mikulas Patocka
2018-08-07 17:39 ` Mikulas Patocka
2018-08-07 18:07 ` Ard Biesheuvel
2018-08-07 18:07 ` Ard Biesheuvel
2018-08-07 18:07 ` Ard Biesheuvel
2018-08-07 18:17 ` Mikulas Patocka
2018-08-07 18:17 ` Mikulas Patocka
2018-08-07 18:17 ` Mikulas Patocka
[not found] ` <CAPv3WKcKoEe=Qysp6Oac2C=G9bUhUQf1twSRCY+_qJ6XEC-iag@mail.gmail.com>
2018-08-08 14:10 ` Mikulas Patocka
2018-08-08 14:10 ` Mikulas Patocka
2018-08-08 14:10 ` Mikulas Patocka
2018-08-06 17:13 ` Catalin Marinas
2018-08-06 17:13 ` Catalin Marinas
2018-08-06 17:13 ` Catalin Marinas
2018-08-06 17:19 ` Mikulas Patocka
2018-08-06 17:19 ` Mikulas Patocka
2018-08-06 17:19 ` Mikulas Patocka
2018-08-08 18:31 ` Mikulas Patocka
2018-08-08 18:31 ` Mikulas Patocka
2018-08-08 18:31 ` Mikulas Patocka
2018-08-04 13:29 ` Mikulas Patocka
2018-08-04 13:29 ` Mikulas Patocka
2018-08-04 13:29 ` Mikulas Patocka
2018-08-08 12:16 ` Catalin Marinas
2018-08-08 12:16 ` Catalin Marinas
2018-08-08 12:16 ` Catalin Marinas
2018-08-08 13:02 ` David Laight
2018-08-08 13:02 ` David Laight
2018-08-08 13:02 ` David Laight
2018-08-08 13:46 ` Mikulas Patocka
2018-08-08 13:46 ` Mikulas Patocka
2018-08-08 13:46 ` Mikulas Patocka
2018-08-08 14:26 ` David Laight
2018-08-08 14:26 ` David Laight
2018-08-08 14:26 ` David Laight
2018-08-08 14:50 ` Catalin Marinas [this message]
2018-08-08 14:50 ` Catalin Marinas
2018-08-08 14:50 ` Catalin Marinas
2018-08-08 16:21 ` Mikulas Patocka
2018-08-08 16:21 ` Mikulas Patocka
2018-08-08 16:21 ` Mikulas Patocka
2018-08-08 16:31 ` Arnd Bergmann
2018-08-08 16:31 ` Arnd Bergmann
2018-08-08 16:31 ` Arnd Bergmann
2018-08-08 16:43 ` David Laight
2018-08-08 16:43 ` David Laight
2018-08-08 16:43 ` David Laight
2018-08-08 18:56 ` Mikulas Patocka
2018-08-08 18:56 ` Mikulas Patocka
2018-08-08 18:56 ` Mikulas Patocka
2018-08-08 18:37 ` Mikulas Patocka
2018-08-08 18:37 ` Mikulas Patocka
2018-08-08 18:37 ` Mikulas Patocka
2018-08-08 11:39 ` Catalin Marinas
2018-08-08 11:39 ` Catalin Marinas
2018-08-08 11:39 ` Catalin Marinas
2018-08-08 14:12 ` Mikulas Patocka
2018-08-08 14:12 ` Mikulas Patocka
2018-08-08 14:12 ` Mikulas Patocka
2018-08-08 14:28 ` Catalin Marinas
2018-08-08 14:28 ` Catalin Marinas
2018-08-08 14:28 ` Catalin Marinas
2018-08-08 18:40 ` Mikulas Patocka
2018-08-08 18:40 ` Mikulas Patocka
2018-08-08 18:40 ` Mikulas Patocka
2018-08-08 15:01 ` Richard Earnshaw (lists)
2018-08-08 15:01 ` Richard Earnshaw (lists)
2018-08-08 15:01 ` Richard Earnshaw (lists)
2018-08-08 15:14 ` Catalin Marinas
2018-08-08 15:14 ` Catalin Marinas
2018-08-08 15:14 ` Catalin Marinas
2018-08-08 16:01 ` Arnd Bergmann
2018-08-08 16:01 ` Arnd Bergmann
2018-08-08 16:01 ` Arnd Bergmann
2018-08-08 18:25 ` Mikulas Patocka
2018-08-08 18:25 ` Mikulas Patocka
2018-08-08 18:25 ` Mikulas Patocka
2018-08-08 21:51 ` Arnd Bergmann
2018-08-08 21:51 ` Arnd Bergmann
2018-08-08 21:51 ` Arnd Bergmann
2018-08-09 15:29 ` Arnd Bergmann
2018-08-09 15:29 ` Arnd Bergmann
2018-08-09 15:29 ` Arnd Bergmann
2018-08-03 7:11 ` Andrew Pinski
2018-08-03 7:11 ` Andrew Pinski
2018-08-03 7:53 ` Florian Weimer
2018-08-03 7:53 ` Florian Weimer
2018-08-03 9:12 ` Szabolcs Nagy
2018-08-03 9:12 ` Szabolcs Nagy
2018-08-03 9:15 ` Ramana Radhakrishnan
2018-08-03 9:15 ` Ramana Radhakrishnan
2018-08-03 9:29 ` Ard Biesheuvel
2018-08-03 9:29 ` Ard Biesheuvel
2018-08-03 9:37 ` Ramana Radhakrishnan
2018-08-03 9:37 ` Ramana Radhakrishnan
2018-08-03 9:42 ` Richard Earnshaw (lists)
2018-08-03 9:42 ` Richard Earnshaw (lists)
2018-08-04 0:58 ` Mikulas Patocka
2018-08-04 0:58 ` Mikulas Patocka
2018-08-04 1:13 ` Andrew Pinski
2018-08-04 1:13 ` Andrew Pinski
2018-08-04 11:04 ` Mikulas Patocka
2018-08-04 11:04 ` Mikulas Patocka
2018-08-05 18:33 ` Florian Weimer
2018-08-05 18:33 ` Florian Weimer
2018-08-06 8:02 ` Mikulas Patocka
2018-08-06 8:02 ` Mikulas Patocka
2018-08-06 8:10 ` Ard Biesheuvel
2018-08-06 8:10 ` Ard Biesheuvel
2018-08-06 10:31 ` Mikulas Patocka
2018-08-06 10:31 ` Mikulas Patocka
2018-08-06 10:37 ` Ard Biesheuvel
2018-08-06 10:37 ` Ard Biesheuvel
2018-08-06 10:42 ` Mikulas Patocka
2018-08-06 10:42 ` Mikulas Patocka
2018-08-06 10:48 ` Ard Biesheuvel
2018-08-06 10:48 ` Ard Biesheuvel
2018-08-06 12:09 ` Mikulas Patocka
2018-08-06 12:09 ` Mikulas Patocka
2018-08-06 12:19 ` Ard Biesheuvel
2018-08-06 12:19 ` Ard Biesheuvel
2018-08-06 12:22 ` Ard Biesheuvel
2018-08-06 12:22 ` Ard Biesheuvel
2018-08-07 14:14 ` Mikulas Patocka
2018-08-07 14:14 ` Mikulas Patocka
2018-08-07 14:40 ` Ard Biesheuvel
2018-08-07 14:40 ` Ard Biesheuvel
2018-08-08 19:15 ` Mikulas Patocka
2018-08-08 19:15 ` Mikulas Patocka
2018-08-06 11:19 ` Siddhesh Poyarekar
2018-08-06 11:19 ` Siddhesh Poyarekar
2018-08-06 11:29 ` Ard Biesheuvel
2018-08-06 11:29 ` Ard Biesheuvel
2018-08-06 14:26 ` Tulio Magno Quites Machado Filho
2018-08-06 14:26 ` Tulio Magno Quites Machado Filho
2018-08-05 21:51 ` Pavel Machek
2018-08-05 21:51 ` Pavel Machek
2018-08-06 14:30 ` Mikulas Patocka
2018-08-06 14:30 ` Mikulas Patocka
2018-08-03 11:24 ` David Laight
2018-08-03 11:24 ` David Laight
2018-08-03 12:04 ` Mikulas Patocka
2018-08-03 12:04 ` Mikulas Patocka
2018-08-03 13:04 ` David Laight
2018-08-03 13:04 ` David Laight
2018-08-05 14:36 ` Mikulas Patocka
2018-08-05 14:36 ` Mikulas Patocka
2018-08-06 10:18 ` David Laight
2018-08-06 10:18 ` David Laight
2018-08-07 14:07 ` Mikulas Patocka
2018-08-07 14:07 ` Mikulas Patocka
2018-08-07 14:33 ` David Laight
2018-08-07 14:33 ` David Laight
2018-08-08 14:21 ` Mikulas Patocka
2018-08-08 14:21 ` Mikulas Patocka
2018-08-03 13:20 ` Mikulas Patocka
2018-08-03 13:20 ` Mikulas Patocka
2018-08-03 13:31 ` Mikulas Patocka
2018-08-03 13:31 ` Mikulas Patocka
2018-08-03 14:17 ` Richard Earnshaw (lists)
2018-08-03 14:17 ` Richard Earnshaw (lists)
2018-08-05 21:36 ` Pavel Machek
2018-08-05 21:36 ` Pavel Machek
2018-08-06 8:04 ` Ramana Radhakrishnan
2018-08-06 8:04 ` Ramana Radhakrishnan
2018-08-06 8:44 ` Pavel Machek
2018-08-06 8:44 ` Pavel Machek
2018-08-06 9:11 ` Ard Biesheuvel
2018-08-06 9:11 ` Ard Biesheuvel
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=20180808145017.GE24736@iMac.local \
--to=catalin.marinas@arm.com \
--cc=David.Laight@ACULAB.COM \
--cc=Joao.Pinto@synopsys.com \
--cc=ard.biesheuvel@linaro.org \
--cc=jingoohan1@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=mpatocka@redhat.com \
--cc=neko@bakuhatsu.net \
--cc=thomas.petazzoni@free-electrons.com \
--cc=will.deacon@arm.com \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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.