Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC

From	Andrew Lunn <andrew@lunn.ch>
Newsgroups	linux.debian.ports.arm, linux.debian.kernel
Subject	Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC
Date	2018-06-09 16:40 +0200
Message-ID	<vYNc5-2e9-3@gated-at.bofh.it> (permalink)
References	(5 earlier) <vWdZ7-66G-1@gated-at.bofh.it> <vWh6G-7OQ-5@gated-at.bofh.it> <vWjLc-V9-7@gated-at.bofh.it> <vWkHf-1tr-3@gated-at.bofh.it> <vYKnT-Aj-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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> With only 1G of physical RAM anything using the full 3G would be
> already so far into swapping hell that it seems like it would be pretty
> unusable. So maybe we can assert that it is unlikely that there is any
> real world usage that would be impacted by this change.

Hi Ian

That was what i was thinking. In theory, one of the kirkwood SoCs can
have 2GB of RAM. But i've not seen many 1G machines, let alone 2G.

> Debian uses a Marvell specific kernel, so we don't need to worry about
> the impact on other platforms.

That i was not sure about. Are there any plans to merge all ARM v5
kernels together? Then this would affect more machines.

> > Or do we need to figure out why highmem breaks on Kirkwood?
> 
> I guess it would be nice from an upstream PoV to know what was going on
> -- in particular in case there were to be other more subtle side
> effects or corruption possible.

I might be able to hack together a 3.5/0.5G split, so forcing some of
the 512MB of RAM i have in my Kirkwood into highmem. Hopefully i can
then reproduce the issue.

     Andrew

Thread

Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC Ian Campbell <ijc@debian.org> - 2018-06-09 13:40 +0200
  Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC Andrew Lunn <andrew@lunn.ch> - 2018-06-09 16:40 +0200
    Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC Ian Campbell <ijc@debian.org> - 2018-06-09 18:20 +0200
      Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC Damien <damien@makelofine.org> - 2018-07-03 23:00 +0200
        Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC Martin Michlmayr <tbm@cyrius.com> - 2018-07-03 23:30 +0200
          Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC Andrew Lunn <andrew@lunn.ch> - 2018-07-04 21:10 +0200
            Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC Martin Michlmayr <tbm@cyrius.com> - 2018-07-04 22:30 +0200
            Re: "external abort on linefetch (0x814)" on Kirkwood 6282 SoC Timo Jyrinki <timo.jyrinki@gmail.com> - 2018-07-22 09:00 +0200

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