linux-kernel - Re: SLUB: purpose of sysfs events on cache creation/removal

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Message-ID: <alpine.DEB.2.21.2001272304080.25307@www.lameter.com>
Date:   Mon, 27 Jan 2020 23:04:53 +0000 (UTC)
From:   Christopher Lameter <cl@...ux.com>
To:     Michal Koutný <mkoutny@...e.com>
cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: SLUB: purpose of sysfs events on cache creation/removal

On Mon, 27 Jan 2020, Michal Koutný wrote:

> When I rerun the script with patched kernel, udev sit mostly idle (there
> were no other udev event sources). So the number can be said to drop to
> 0% CPU time / event/s.
>
> > Typically the author, but not always.  If someone else is particularly
> > motivated to get a patch merged up they can take it over.
> Christopher, do you consider resending your patch? (I second that it
> exposes the internal details (wrt cgroup caches) and I can observe the
> just reading the events by udevd wastes CPU time.)

The patch exposes details of cgroup caches? Which patch are we talking
about?