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Date:   Tue, 12 Dec 2017 09:00:53 +0100
From:   Pavel Machek <>
To:     Zhang Rui <>
Cc:     Linus Torvalds <>,
        Andrew Lutomirski <>,
        Thomas Gleixner <>,
        Jarkko Nikula <>,
        "Rafael J. Wysocki" <>,
        Linux Kernel Mailing List <>,
        the arch/x86 maintainers <>
Subject: Re: Linux 4.15-rc2: Regression in resume from ACPI S3


> > > ...should take 10 seconds or so.
> > I'm told 0day does *some* suspend/resume testing, but I think it's
> > pretty limited, partly because the kinds of machines it primarily
> > works on don't really support suspend/resume at all.
> currently, we're running suspend test on 1 platform only, with 64 bit
> kernel. suspend test will be enabled on more platforms (laptops) in
> next two weeks.


> >  I'm also not sure
> > just how many of those machines are 32-bit at all..
> for this, I suppose it can be reproduced if we use 32-bit kernel and
> rootfs, right? Then it's easier to enable this in 0Day.

Yes, Intel cpus are pretty good at backwards compatibility, and most
problems are not subtle at all. So yes, 32-bit kernel / rootfs on
recent machine should be good for testing.

Best regards,
(cesky, pictures)

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