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From: Kevin Locke <[email protected]>
To: Jens Axboe <[email protected]>
Cc: [email protected], [email protected],
	[email protected]
Subject: Re: [v5.12-rc2 regression] io_uring: high CPU use after suspend-to-ram
Date: Tue, 9 Mar 2021 20:23:26 -0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On Tue, 2021-03-09 at 19:48 -0700, Jens Axboe wrote:
> On 3/9/21 6:55 PM, Kevin Locke wrote:
>> With kernel 5.12-rc2 (and torvalds/master 144c79ef3353), if mpd is
>> playing or paused when my system is suspended-to-ram, when the system is
>> resumed mpd will consume ~200% CPU until killed.  It continues to
>> produce audio and respond to pause/play commands, which do not affect
>> CPU usage.  This occurs with either pulse (to PulseAudio or
>> PipeWire-as-PulseAudio) or alsa audio_output.
> 
> The below makes it work as expected for me - but I don't quite
> understand why we're continually running after the freeze. Adding Rafael
> to help understand this.

I can confirm that your patch resolves the high CPU usage after suspend
on my system as well.  Many thanks!

Tested-by: Kevin Locke <[email protected]>

Happy to test any future revisions as well.

Thanks again,
Kevin

  reply	other threads:[~2021-03-10  3:24 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-10  1:55 [v5.12-rc2 regression] io_uring: high CPU use after suspend-to-ram Kevin Locke
2021-03-10  2:18 ` Jens Axboe
2021-03-10  2:48 ` Jens Axboe
2021-03-10  3:23   ` Kevin Locke [this message]
2021-03-10 14:45     ` Jens Axboe

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