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Date: Tue, 12 Jan 2016 09:05:06 +0800 From: Xishi Qiu <qiuxishi@...wei.com> To: David Rientjes <rientjes@...gle.com> CC: Michal Hocko <mhocko@...nel.org>, <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>, <iamjoonsoo.kim@....com>, Andrew Morton <akpm@...ux-foundation.org>, zhong jiang <zhongjiang@...wei.com>, Linux MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] mm: add ratio in slabinfo print On 2016/1/12 8:20, David Rientjes wrote: > On Mon, 11 Jan 2016, Xishi Qiu wrote: > >>> On Mon 11-01-16 11:54:57, Xishi Qiu wrote: >>>> Add ratio(active_objs/num_objs) in /proc/slabinfo, it is used to show >>>> the availability factor in each slab. >>> >>> What is the reason to add such a new value when it can be trivially >>> calculated from the userspace? >>> >>> Besides that such a change would break existing parsers no? >> >> Oh, maybe it is. >> > > If you need the information internally, you could always create a library > around slabinfo and export the information for users who are interested > for your own use. Doing anything other than appending fields to each line > is too dangerous, however, as a general rule. > > OK, I know. Thanks, Xishi Qiu
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