Messages in this thread | | | Date | Thu, 21 Jul 2022 11:08:14 +0800 | Subject | Re: [LKP] Re: [io_uring] 584b0180f0: phoronix-test-suite.fio.SequentialWrite.IO_uring.Yes.Yes.1MB.DefaultTestDirectory.mb_s -10.2% regression | From | Yin Fengwei <> |
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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
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