linux-kernel - Re: [PATCH] x86/fault: speed up uffd-unit-test by 10x: rate-limit "MCE: Killing" logs

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Message-ID: <99358cd9-3f3f-4ba1-bd8b-898cdf819e2d@redhat.com>
Date: Tue, 7 May 2024 18:55:50 +0200
From: David Hildenbrand <david@...hat.com>
To: John Hubbard <jhubbard@...dia.com>, Andy Lutomirski <luto@...nel.org>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>,
 Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>,
 Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
 x86@...nel.org, "H . Peter Anvin" <hpa@...or.com>,
 LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
 Peter Xu <peterx@...hat.com>, Axel Rasmussen <axelrasmussen@...gle.com>
Subject: Re: [PATCH] x86/fault: speed up uffd-unit-test by 10x: rate-limit
 "MCE: Killing" logs

On 07.05.24 18:53, John Hubbard wrote:
> On 5/7/24 9:43 AM, David Hildenbrand wrote:
>> On 07.05.24 18:28, John Hubbard wrote:
>>> On 5/7/24 1:13 AM, David Hildenbrand wrote:
> ...
>>> I'd like to just do this patch almost as-is, just with a fixed up
>>> subject,
>>> perhaps:
>>>
>>>        x86/fault: rate-limit to avoid flooding dmesg with "MCE: Killing"
>>> reports
>>>
>>> Yes?
>>
>>
>> Makes sense to me (and thanks for confirming that we don't need
>> complexity elsewhere).
>>
>> I think we at least need "Fixes:" (not sure if stable is warranted as
>> well, 1b0a151c10a6d823f033023b9fdd9af72a89591b didn't CC stable).
>>
>> Consider adding a link to the report in that thread.
>>
>> Acked-by: David Hildenbrand <david@...hat.com>
>>
> 
> OK, there's enough changes to the commit description that I'll go ahead
> and send a v2, with a new subject line, a Fixes:, your Ack, a link to
> the other conversation, and maybe reword a bit based on your feedback
> too.

Sounds good. We might want to CC stable: I just read 
1b0a151c10a6d823f033023b9fdd9af72a89591b and I think the problem there 
cannot really be triggered by unprivileged users.

Hm... thanks!

-- 
Cheers,

David / dhildenb