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

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Message-ID: <20191127174317.GD26807@dhcp22.suse.cz>
Date:   Wed, 27 Nov 2019 18:43:17 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Christopher Lameter <cl@...ux.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: SLUB: purpose of sysfs events on cache creation/removal

On Wed 27-11-19 16:26:11, Cristopher Lameter wrote:
> On Wed, 27 Nov 2019, Michal Hocko wrote:
> 
> > Would you mind a patch that would add a kernel command line parameter
> > that would work like memcg_sysfs_enabled? The default for the config
> > would be on. Or it would be preferrable to simply drop only events?
> 
> Just drop the events may be best. Then we know if someone is using it.

I would be worried that a lack of events might be surprising and a
potential userspace wouldn't know that something has changed.

-- 
Michal Hocko
SUSE Labs