linux-kernel - Re: [PATCH 0/6] sched,delayacct: Some cleanups

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Message-ID: <20210512130058.GJ3672@suse.de>
Date:   Wed, 12 May 2021 14:00:58 +0100
From:   Mel Gorman <mgorman@...e.de>
To:     Paul Wise <pabs3@...edaddy.net>
Cc:     Balbir Singh <bsingharora@...il.com>,
        Peter Zijlstra <peterz@...radead.org>, tglx@...utronix.de,
        mingo@...nel.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, bristot@...hat.com,
        pbonzini@...hat.com, maz@...nel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, riel@...riel.com, hannes@...xchg.org
Subject: Re: [PATCH 0/6] sched,delayacct: Some cleanups

On Wed, May 12, 2021 at 08:23:51PM +0800, Paul Wise wrote:
> On Wed, 2021-05-12 at 12:34 +0100, Mel Gorman wrote:
> 
> > Alternatively, I've added Paul Wise to the cc who is the latest
> > committer to iotop.  Maybe he knows who could add/commit a check for
> > sysctl.sched_delayacct and if it exists then check if it's 1 and display
> > an error suggesting corrective action (add delayacct to the kernel command
> > line or sysctl sched.sched_delayacct=1). iotop appears to be in maintenance
> > mode but gets occasional commits even if it has not had a new version
> > since 2013 so maybe it could get a 0.7 tag if such a check was added.
> 
> I am able to commit to the iotop repository but I don't have permission
> from the author to make releases nor do I have access to the website.
> 
> I am happy to apply any patches anyone has for iotop and upload the
> result to Debian, or I'll be willing to write patches to cope with
> changes in Linux behaviour, if given a succinct explanation of what
> changes are needed in iotop, once the Linux changes are fully merged.
> 

If you send me the same patch, I can do submit a request to the devel
package for openSUSE. I don't have commit access but I would be surprised
if the package maintainer didn't accept the request. Obviously, I'll
build+boot a kernel that includes the final version of this series in
case of any naming changes or other oddities.

> As well as the Python iotop implementation, there is one written in C 
> with more features, so please also file an issue or pull request there.
> Please note that I don't have commit access to that repository though.
> 

Good thinking. I'll open a bug on github when I've tested your iotop
patch so that the bug report is more coherent.

Thanks for the quick response.

-- 
Mel Gorman
SUSE Labs

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