Re: [PATCH 6.4 800/800] io_uring: Use io_schedule* in cqring wait

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On 7/23/23 06:50, Greg Kroah-Hartman wrote:
On Sun, Jul 23, 2023 at 11:39:42AM +0200, Oleksandr Natalenko wrote:
Hello.

On neděle 16. července 2023 21:50:53 CEST Greg Kroah-Hartman wrote:
From: Andres Freund <andres@xxxxxxxxxxx>

commit 8a796565cec3601071cbbd27d6304e202019d014 upstream.

I observed poor performance of io_uring compared to synchronous IO. That
...

Reportedly, this caused a regression as reported in [1] [2] [3]. Not only v6.4.4 is affected, v6.1.39 is affected too.

Reverting this commit fixes the issue.

Please check.

Is this also an issue in 6.5-rc2?

thanks,

greg k-h

Yes - I can confirm this issue is in 6.5-rc2 and with Linus' commit c2782531397f5cb19ca3f8f9c17727f1cdf5bee8.


gene




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