linux-kernel - Re: [linus:master] [page cache] 9425c591e0: vm-scalability.throughput -20.0% regression

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Date:   Fri, 23 Jun 2023 14:36:52 +0200
From:   "Linux regression tracking #adding (Thorsten Leemhuis)" 
        <regressions@...mhuis.info>
To:     kernel test robot <oliver.sang@...el.com>,
        Mike Kravetz <mike.kravetz@...cle.com>
Cc:     oe-lkp@...ts.linux.dev, lkp@...el.com,
        linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ackerley Tng <ackerleytng@...gle.com>,
        Erdem Aktas <erdemaktas@...gle.com>,
        Matthew Wilcox <willy@...radead.org>,
        Muchun Song <songmuchun@...edance.com>,
        Sidhartha Kumar <sidhartha.kumar@...cle.com>,
        Vishal Annapurve <vannapurve@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-fsdevel@...r.kernel.org, ying.huang@...el.com,
        feng.tang@...el.com, fengwei.yin@...el.com,
        Linux kernel regressions list <regressions@...ts.linux.dev>
Subject: Re: [linus:master] [page cache] 9425c591e0: vm-scalability.throughput
 -20.0% regression

[I know this is mostly been dealt with already, but due to the immanent
release I'll add this to the tracking to make sure Linus becomes aware
of this]

[TLDR: I'm adding this report to the list of tracked Linux kernel
regressions; the text you find below is based on a few templates
paragraphs you might have encountered already in similar form.
See link in footer if these mails annoy you.]

On 21.06.23 09:19, kernel test robot wrote:

> 
> kernel test robot noticed a -20.0% regression of vm-scalability.throughput on:
> 
> 
> commit: 9425c591e06a9ab27a145ba655fb50532cf0bcc9 ("page cache: fix page_cache_next/prev_miss off by one")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> [...]

Thanks for the report. To be sure the issue doesn't fall through the
cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression
tracking bot:

#regzbot ^introduced 9425c591e06a
#regzbot title mm/page cache: performance regression (2 reverts pending)
#regzbot monitor:
https://lore.kernel.org/all/20230621212403.174710-1-mike.kravetz@oracle.com/
#regzbot ignore-activity

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
That page also explains what to do if mails like this annoy you.