linux-kernel - Re: [linus:master] [btrfs] 4ae2edf12d: fio.write

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Date:   Fri, 14 Apr 2023 07:24:58 +0200
From:   Christoph Hellwig <hch@....de>
To:     kernel test robot <yujie.liu@...el.com>
Cc:     Christoph Hellwig <hch@....de>, oe-lkp@...ts.linux.dev,
        lkp@...el.com, linux-kernel@...r.kernel.org,
        David Sterba <dsterba@...e.com>,
        Johannes Thumshirn <johannes.thumshirn@....com>,
        Anand Jain <anand.jain@...cle.com>,
        linux-btrfs@...r.kernel.org, ying.huang@...el.com,
        feng.tang@...el.com, fengwei.yin@...el.com
Subject: Re: [linus:master] [btrfs] 4ae2edf12d: fio.write_iops -11.9%
 regression

On Fri, Apr 14, 2023 at 10:01:51AM +0800, kernel test robot wrote:
> Hello,
> 
> kernel test robot noticed a -11.9% regression of fio.write_iops on:
> 
> commit: 4ae2edf12d49fdbaea2dfda0bb2ec06501bd3493 ("btrfs: simplify parameters of btrfs_lookup_bio_sums")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

Can you revalidate this?  The patch is purely a parameter passing
cleanup, so a large reduction in IOPS looks very suspicious.