Messages in this thread | | | Date | Tue, 24 Aug 2021 17:33:42 -0400 | From | Dave Jones <> | Subject | Re: 5.14-rc breaks iotop swap io monitoring. |
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On Tue, Aug 24, 2021 at 09:34:02AM -0700, Linus Torvalds wrote: > On Tue, Aug 24, 2021 at 8:19 AM Dave Jones <davej@codemonkey.org.uk> wrote: > > > > On Tue, Aug 24, 2021 at 10:31:16AM +0200, Peter Zijlstra wrote: > > > > > > If you need DELAYACCT I'm thinking: > > > > > > e4042ad49235 ("delayacct: Default disabled") > > > > > > and > > > > > > 0cd7c741f01d ("delayacct: Add sysctl to enable at runtime") > > > > That does sound more relevant. however, even after echo 1 > /proc/sys/kernel/task_delayacct, > > it still fails in the same way. > > Hmm. > > What happens if you boot with the 'delayacct' kernel parameter. > > Even if you enable it at run-time, processes that have been started > before it was enabled won't actually have the 'tsk->delays' > allocation. So I'm not sure how effective the run-time thing is.
Yeah that boot option does make iotop work again.
Dave
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