From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: "debian-powerpc@lists.debian.org"
<debian-powerpc@lists.debian.org>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: Linux kernel: powerpc: KVM guest can trigger host crash on Power8
Date: Tue, 4 Jan 2022 14:00:11 +0100 [thread overview]
Message-ID: <fca7cf14-b598-d25a-8f71-8d1c16a84e5f@physik.fu-berlin.de> (raw)
In-Reply-To: <87k0hs8iyq.fsf@mpe.ellerman.id.au>
Hi Michael!
Sorry for the long time without any responses. Shall we continue debugging this?
We're currently running 5.15.x on the host system and the guests and the testsuite
for gcc-9 still reproducibly kills the KVM host.
Adrian
On 11/1/21 07:53, Michael Ellerman wrote:
> Sure, will give that a try.
>
> I was able to crash my machine over the weekend, building openjdk, but I
> haven't been able to reproduce it for ~24 hours now (I didn't change
> anything).
>
>
> Can you try running your guests with no SMT threads?
>
> I think one of your guests was using:
>
> -smp 32,sockets=1,dies=1,cores=8,threads=4
>
> Can you change that to:
>
> -smp 8,sockets=1,dies=1,cores=8,threads=1
>
>
> And something similar for the other guest(s).
>
> If the system is stable with those settings that would be useful
> information, and would also mean you could use the system without it
> crashing semi regularly.
>
> cheers
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
next prev parent reply other threads:[~2022-01-04 13:04 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-25 11:18 Linux kernel: powerpc: KVM guest can trigger host crash on Power8 Michael Ellerman
2021-10-26 8:48 ` John Paul Adrian Glaubitz
2021-10-27 5:29 ` Nicholas Piggin
2021-10-27 5:30 ` Michael Ellerman
2021-10-27 10:03 ` John Paul Adrian Glaubitz
2021-10-27 11:06 ` Michael Ellerman
2021-10-27 11:09 ` John Paul Adrian Glaubitz
2021-10-28 6:39 ` Michael Ellerman
2021-10-28 11:20 ` John Paul Adrian Glaubitz
2021-10-28 14:05 ` John Paul Adrian Glaubitz
2021-10-28 14:15 ` John Paul Adrian Glaubitz
2021-11-01 17:36 ` Michal Suchánek
2021-10-29 0:41 ` Nicholas Piggin
2021-10-29 12:33 ` John Paul Adrian Glaubitz
2021-11-01 17:43 ` Michal Suchánek
2021-10-30 7:19 ` John Paul Adrian Glaubitz
2021-11-01 6:53 ` Michael Ellerman
2021-11-01 7:37 ` John Paul Adrian Glaubitz
2021-11-01 17:20 ` John Paul Adrian Glaubitz
2022-01-04 13:00 ` John Paul Adrian Glaubitz [this message]
2022-01-06 10:58 ` Michael Ellerman
2022-01-07 11:20 ` John Paul Adrian Glaubitz
2022-01-09 22:17 ` John Paul Adrian Glaubitz
2022-01-13 0:17 ` John Paul Adrian Glaubitz
2022-01-26 20:21 ` John Paul Adrian Glaubitz
2022-01-27 15:50 ` Mike
2021-10-28 13:52 ` John Paul Adrian Glaubitz
2021-10-28 14:00 ` John Paul Adrian Glaubitz
2021-10-28 3:58 ` [oss-security] " Salvatore Bonaccorso
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