From: Thorsten Leemhuis <regressions@leemhuis.info>
To: "regressions@lists.linux.dev" <regressions@lists.linux.dev>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [mm] f35b5d7d67: will-it-scale.per_process_ops -95.5% regression #forregzbot
Date: Fri, 2 Dec 2022 07:43:17 +0100 [thread overview]
Message-ID: <8d2dbbb5-5816-c1e9-e98c-6c64a8d85f81@leemhuis.info> (raw)
In-Reply-To: <84964891-5a39-adb2-3093-54b716ca94ae@leemhuis.info>
On 29.11.22 09:59, Thorsten Leemhuis wrote:
> [Note: this mail is primarily send for documentation purposes and/or for
> regzbot, my Linux kernel regression tracking bot. That's why I removed
> most or all folks from the list of recipients, but left any that looked
> like a mailing lists. These mails usually contain '#forregzbot' in the
> subject, to make them easy to spot and filter out.]
>
> On 20.10.22 06:23, Nathan Chancellor wrote:
>> [...]
>> For what it's worth, I just bisected a massive and visible performance
>> regression on my Threadripper 3990X workstation to commit f35b5d7d676e
>> ("mm: align larger anonymous mappings on THP boundaries"), which seems
>> directly related to this report/analysis. I initially noticed this
>> because my full set of kernel builds against mainline went from 2 hours
>> and 20 minutes or so to over 3 hours. Zeroing in on x86_64 allmodconfig,
>> which I used for the bisect:
>
> Thanks for the report. To be sure below issue doesn't fall through the
> cracks unnoticed, I'm adding it to regzbot, my Linux kernel regression
> tracking bot:
>
> #regzbot ^introduced f35b5d7d676e59e4
> #regzbot title performance: mm: building Linux with clang takes a lot
> longer (~27 %)
> #regzbot ignore-activity
#regzbot fix: revert "mm: align larger anonymous mappings on THP boundaries"
Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
P.S.: As the Linux kernel's regression tracker I deal with a lot of
reports and sometimes miss something important when writing mails like
this. If that's the case here, don't hesitate to tell me in a public
reply, it's in everyone's interest to set the public record straight.
prev parent reply other threads:[~2022-12-02 6:43 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-18 8:44 [mm] f35b5d7d67: will-it-scale.per_process_ops -95.5% regression kernel test robot
2022-10-19 2:05 ` Huang, Ying
2022-10-20 4:23 ` Nathan Chancellor
2022-10-20 5:07 ` Huang, Ying
2022-10-20 15:28 ` Rik van Riel
2022-10-20 17:16 ` Nathan Chancellor
2022-11-28 6:40 ` Nathan Chancellor
2022-12-01 18:33 ` Thorsten Leemhuis
2022-12-01 20:29 ` Rik van Riel
2022-12-01 21:22 ` Andrew Morton
2022-12-01 21:44 ` Yang Shi
2022-12-02 8:46 ` Thorsten Leemhuis
2022-12-02 18:44 ` Andrew Morton
2022-12-02 19:37 ` Thorsten Leemhuis
2022-12-01 21:35 ` Nathan Chancellor
2022-12-16 11:48 ` Yin, Fengwei
2022-10-20 16:40 ` Yujie Liu
2022-11-29 8:59 ` [mm] f35b5d7d67: will-it-scale.per_process_ops -95.5% regression #forregzbot Thorsten Leemhuis
2022-12-02 6:43 ` Thorsten Leemhuis [this message]
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