linux-kernel - Re: [syzbot] [mm?] BUG: Bad page map (7)

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Message-ID: <f40677ee-8b8e-b719-24ed-662c219c6989@intel.com>
Date:   Tue, 19 Sep 2023 09:11:49 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Yin Fengwei <fengwei.yin@...el.com>,
        Matthew Wilcox <willy@...radead.org>
Cc:     syzbot <syzbot+55cc72f8cc3a549119df@...kaller.appspotmail.com>,
        akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [mm?] BUG: Bad page map (7)

On 9/18/23 18:11, Yin Fengwei wrote:
>> I will find a test machine to measure the performance difference of these two
>> versions by using xfs + will-it-scale. Will keep you guys updated.
> I'd like to move this bug fixing forward. Based on the test result here:
> https://lore.kernel.org/linux-mm/124631ab-eb4c-6584-12d4-f3c91e69c873@intel.com/
> There is very small performance delta between your version and Dave's.
> 
> What do you think if we propose to merge Dave's version? Or do I need collect
> more data? Thanks.

I honestly don't feel that strongly about my version versus Matthew's.
I like mine, but I'll happily ack either approach.

The thing I care about the most is getting the bug fixed ... quickly. :)