From: Yin Fengwei <[email protected]>
To: Jens Axboe <[email protected]>, kernel test robot <[email protected]>
Cc: LKML <[email protected]>, <[email protected]>,
<[email protected]>, <[email protected]>
Subject: Re: [LKP] Re: [io_uring] 584b0180f0: phoronix-test-suite.fio.SequentialWrite.IO_uring.Yes.Yes.1MB.DefaultTestDirectory.mb_s -10.2% regression
Date: Thu, 21 Jul 2022 11:08:14 +0800 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
Hi Jens,
On 7/21/2022 1:24 AM, Jens Axboe wrote:
> I think this turned out to be a little bit of a goose chase. What's
> happening here is that later kernels defer the file assignment, which
> means it isn't set if a request is queued with IOSQE_ASYNC. That in
> turn, for writes, means that we don't hash it on io-wq insertion, and
> then it doesn't get serialized with other writes to that file.
Thanks a lot for the detail behavior explanation.
Regards
Yin, Fengwei
prev parent reply other threads:[~2022-07-21 3:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220527092432.GE11731@xsang-OptiPlex-9020>
2022-05-27 13:50 ` [io_uring] 584b0180f0: phoronix-test-suite.fio.SequentialWrite.IO_uring.Yes.Yes.1MB.DefaultTestDirectory.mb_s -10.2% regression Jens Axboe
2022-06-08 8:00 ` Oliver Sang
2022-06-14 1:54 ` [LKP] " Yin Fengwei
2022-07-12 8:06 ` Yin Fengwei
2022-07-15 15:58 ` Jens Axboe
2022-07-18 0:58 ` Yin Fengwei
2022-07-18 1:14 ` Jens Axboe
2022-07-18 3:30 ` Yin Fengwei
2022-07-18 16:27 ` Jens Axboe
2022-07-19 0:27 ` Yin Fengwei
2022-07-19 2:16 ` Yin Fengwei
2022-07-19 2:29 ` Jens Axboe
2022-07-19 8:58 ` Yin Fengwei
2022-07-20 17:24 ` Jens Axboe
2022-07-20 18:13 ` Jens Axboe
2022-07-20 23:25 ` Yin Fengwei
2022-07-21 2:59 ` Yin Fengwei
2022-07-21 3:08 ` Yin Fengwei [this message]
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