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From: Peter Zijlstra <>
To: Dave Jones <>,
	Linux Kernel <>,
	Johannes Weiner <>,
	Linus Torvalds <>
Subject: Re: 5.14-rc breaks iotop swap io monitoring.
Date: Tue, 24 Aug 2021 10:31:16 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Mon, Aug 23, 2021 at 11:16:48PM -0400, Dave Jones wrote:
> I just noticed that in 5.14-rc running iotop, it complains on startup
> that "CONFIG_TASK_DELAY_ACCT not enabled in kernel, cannot determine
> SWAPIN and IO %" and sure enough a bunch of columns show up as
> 'unavailable'.
> My suspicion is this commit, which I've not confirmed yet as it doesn't
> cleanly revert.  I'll poke at it some more in the morning, but figured
> I'd bring it up sans-evidence in the hope that I'll wake up to someone
> having an Ah-ha moment.

If you need DELAYACCT I'm thinking:

  e4042ad49235 ("delayacct: Default disabled")


  0cd7c741f01d ("delayacct: Add sysctl to enable at runtime")

might be more relevant..

  parent reply	other threads:[~2021-08-24  8:31 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24  3:16 Dave Jones
2021-08-24  3:18 ` Dave Jones
2021-08-24  8:31 ` Peter Zijlstra [this message]
2021-08-24 15:19   ` Dave Jones
2021-08-24 16:34     ` Linus Torvalds
2021-08-24 17:35       ` Peter Zijlstra
2021-08-24 21:33       ` Dave Jones
2021-08-24 23:26         ` Linus Torvalds
2021-08-25  0:29           ` Dave Jones
2021-08-25  7:36           ` Peter Zijlstra

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