linux-kernel - Re: [sparc64] kernel panic from running a program in userspace

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Date:   Sat, 19 Jun 2021 12:45:45 +0300
From:   Anatoly Pugachev <matorola@...il.com>
To:     Colin Ian King <colin.king@...onical.com>
Cc:     Sparc kernel list <sparclinux@...r.kernel.org>,
        Linux Kernel list <linux-kernel@...r.kernel.org>,
        debian-sparc <debian-sparc@...ts.debian.org>,
        kernel-testers@...r.kernel.org
Subject: Re: [sparc64] kernel panic from running a program in userspace

On Sat, Jun 19, 2021 at 12:31 PM Colin Ian King
<colin.king@...onical.com> wrote:
>
> Hi,
>
> I suspect this issue was fixed with the following commit:
>
> commit e5e8b80d352ec999d2bba3ea584f541c83f4ca3f
> Author: Rob Gardner <rob.gardner@...cle.com>
> Date:   Sun Feb 28 22:48:16 2021 -0700
>
>     sparc64: Fix opcode filtering in handling of no fault loads

Colin,

yes, but I believe that it was quite a different kernel bug.
Besides, my current kernel test is based on git kernel 5.13.0-rc6
(released last monday), which already includes the mentioned 'opcode'
fix.

> > stress-ng.git$ ./stress-ng --verbose --timeout 10m --opcode -1
> > stress-ng: debug: [480950] stress-ng 0.12.10 g27f90a2276bd
> > stress-ng: debug: [480950] system: Linux ttip 5.13.0-rc6 #229 SMP Tue
> > Jun 15 12:30:23 MSK 2021 sparc64
> > stress-ng: debug: [480950] RAM total: 7.8G, RAM free: 7.0G, swap free: 768.7M
> > stress-ng: debug: [480950] 8 processors online, 256 processors configured
> > stress-ng: info:  [480950] dispatching hogs: 8 opcode