From: Juergen Gross <jgross@suse.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: Re: MCE in pv-domU
Date: Wed, 7 Jun 2017 16:23:20 +0200 [thread overview]
Message-ID: <678ec56b-208e-96ef-6d07-cadb7590c117@suse.com> (raw)
In-Reply-To: <5938258A02000078001606F3@suse.com>
On 07/06/17 16:10, Jan Beulich wrote:
>>>> On 07.06.17 at 16:00, <jgross@suse.com> wrote:
>> Just saw the message:
>>
>> [ 0.005227] mce: CPU supports 2 MCE banks
>>
>> in the boot log of a pv domU (Linux 4.11). I really have problems to see
>> the value of MCE handling being active in this case. Shouldn't we switch
>> it off?
>
> What's wrong with letting a guest decide on its own what to do
> if a memory page assigned to it went bad? From host perspective
> the only "recovery" would be to kill the guest. The guest kernel,
> otoh, may be able to confine damage to just the killing of a single
> process (or if the page is not in use, no damage would result at
> all).
So the MCE related resources are fully virtualized for the guest?
Juergen
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next prev parent reply other threads:[~2017-06-07 14:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-07 14:00 MCE in pv-domU Juergen Gross
2017-06-07 14:10 ` Jan Beulich
[not found] ` <5938258A02000078001606F3@suse.com>
2017-06-07 14:23 ` Juergen Gross [this message]
2017-06-07 14:31 ` Jan Beulich
2017-06-07 15:51 ` Andrew Cooper
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