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[213.151.95.130]) by smtp.gmail.com with ESMTPSA id c1sm6273706wmk.22.2019.12.04.05.28.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Dec 2019 05:28:12 -0800 (PST) Date: Wed, 4 Dec 2019 14:28:12 +0100 From: Michal Hocko To: Christopher Lameter Cc: LKML , linux-mm@kvack.org Subject: Re: SLUB: purpose of sysfs events on cache creation/removal Message-ID: <20191204132812.GF25242@dhcp22.suse.cz> References: <20191126121901.GE20912@dhcp22.suse.cz> <20191126165420.GL20912@dhcp22.suse.cz> <20191127162400.GT20912@dhcp22.suse.cz> <20191127174317.GD26807@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191127174317.GD26807@dhcp22.suse.cz> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 27-11-19 18:43:17, Michal Hocko wrote: > 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. It would be great to land with some decision here. -- Michal Hocko SUSE Labs