linux-kernel - Re: [BISECTED] bug/regression, x86-64: completely unbootable machine

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Message-ID: <CALjTZvZ2B3X1F=tVOvC4h0yGAfEvfu6HUZERmydMrVRsXdOtuQ@mail.gmail.com>
Date:   Fri, 24 Apr 2020 09:21:37 +0100
From:   Rui Salvaterra <rsalvaterra@...il.com>
To:     Giovanni Gherdovich <ggherdovich@...e.cz>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [BISECTED] bug/regression, x86-64: completely unbootable machine

On Fri, 24 Apr 2020 at 09:11, Giovanni Gherdovich <ggherdovich@...e.cz> wrote:
>
> Hello Rui,
>
> thanks for the report.
>
> The problem you encountered is due to a bug where the code doesn't work on
> machines with less than 4 physical CPU cores. It is fixed by this patch
> series:
>
> https://lore.kernel.org/lkml/20200416054745.740-1-ggherdovich@suse.cz/
>
> The series has been merged in the branch sched/urgent of the "tip" tree
> (https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git), the commit
> fixing the bug you observed is 23ccee22e834 (x86, sched: Account for CPUs
> with less than 4 cores in freq. invariance), and will be merged in Linus'
> tree at some point.
>
>
> Thanks,
> Giovanni Gherdovich

Hi, Giovanni,

Great, thanks for the quick turnaround. I wager it will have hit
Linus' tree by 5.7-rc3.

Best regards,
Rui