From: Theodore Y. Ts'o <tytso@mit.edu>
To: lkp@lists.01.org
Subject: Re: [ext4] 05c2c00f37: aim7.jobs-per-min -11.8% regression
Date: Fri, 21 May 2021 12:42:16 -0400 [thread overview]
Message-ID: <YKfi6Pv+qwduKxuT@mit.edu> (raw)
In-Reply-To: <20210521092730.GE18952@quack2.suse.cz>
[-- Attachment #1: Type: text/plain, Size: 481 bytes --]
On Fri, May 21, 2021 at 11:27:30AM +0200, Jan Kara wrote:
>
> OK, thanks for testing. So the orphan code is indeed the likely cause of
> this regression but I probably did not guess correctly what is the
> contention point there. Then I guess I need to reproduce and do more
> digging why the contention happens...
Hmm... what if we only recalculate the superblock checksum when we do
a commit, via the callback function from the jbd2 layer to file
system?
- Ted
WARNING: multiple messages have this Message-ID (diff)
From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: Jan Kara <jack@suse.cz>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>,
kernel test robot <oliver.sang@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
lkp@lists.01.org, lkp@intel.com
Subject: Re: [LKP] [ext4] 05c2c00f37: aim7.jobs-per-min -11.8% regression
Date: Fri, 21 May 2021 12:42:16 -0400 [thread overview]
Message-ID: <YKfi6Pv+qwduKxuT@mit.edu> (raw)
In-Reply-To: <20210521092730.GE18952@quack2.suse.cz>
On Fri, May 21, 2021 at 11:27:30AM +0200, Jan Kara wrote:
>
> OK, thanks for testing. So the orphan code is indeed the likely cause of
> this regression but I probably did not guess correctly what is the
> contention point there. Then I guess I need to reproduce and do more
> digging why the contention happens...
Hmm... what if we only recalculate the superblock checksum when we do
a commit, via the callback function from the jbd2 layer to file
system?
- Ted
next prev parent reply other threads:[~2021-05-21 16:42 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-27 12:08 [ext4] 05c2c00f37: aim7.jobs-per-min -11.8% regression kernel test robot
2021-02-27 12:08 ` kernel test robot
2021-05-20 7:13 ` Xing Zhengjun
2021-05-20 9:51 ` Jan Kara
2021-05-20 9:51 ` [LKP] " Jan Kara
2021-05-21 1:16 ` Xing Zhengjun
2021-05-21 1:16 ` [LKP] " Xing Zhengjun
2021-05-21 9:27 ` Jan Kara
2021-05-21 9:27 ` [LKP] " Jan Kara
2021-05-21 16:42 ` Theodore Y. Ts'o [this message]
2021-05-21 16:42 ` Theodore Y. Ts'o
2021-05-25 9:22 ` Jan Kara
2021-05-25 9:22 ` [LKP] " Jan Kara
2021-05-25 17:15 ` Theodore Ts'o
2021-05-25 17:15 ` [LKP] " Theodore Ts'o
2021-05-31 16:57 ` Jan Kara
2021-05-31 16:57 ` [LKP] " Jan Kara
2021-06-03 16:10 ` Jan Kara
2021-06-03 16:10 ` [LKP] " Jan Kara
2021-09-03 5:28 ` Xing Zhengjun
2021-09-03 5:28 ` [LKP] " Xing Zhengjun
2021-09-03 12:32 ` Theodore Ts'o
2021-09-03 12:32 ` [LKP] " Theodore Ts'o
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