From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx113.postini.com [74.125.245.113]) by kanga.kvack.org (Postfix) with SMTP id 16CCD6B018F for ; Wed, 1 May 2013 11:53:39 -0400 (EDT) Subject: Re: [PATCH 1/2] Make the batch size of the percpu_counter configurable From: Tim Chen In-Reply-To: <51809F8D.3040305@gmail.com> References: <51809F8D.3040305@gmail.com> Content-Type: text/plain; charset="UTF-8" Date: Wed, 01 May 2013 08:53:39 -0700 Message-ID: <1367423619.27102.198.camel@schen9-DESK> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Simon Jeons Cc: Andrew Morton , Tejun Heo , Christoph Lameter , Al Viro , Dave Hansen , Andi Kleen , linux-kernel , linux-mm On Wed, 2013-05-01 at 12:52 +0800, Simon Jeons wrote: > Hi Tim, > On 04/30/2013 01:12 AM, Tim Chen wrote: > > Currently, there is a single, global, variable (percpu_counter_batch) that > > controls the batch sizes for every 'struct percpu_counter' on the system. > > > > However, there are some applications, e.g. memory accounting where it is > > more appropriate to scale the batch size according to the memory size. > > This patch adds the infrastructure to be able to change the batch sizes > > for each individual instance of 'struct percpu_counter'. > > > > I have chosen to implement the added field of batch as a pointer > > (by default point to percpu_counter_batch) instead > > of a static value. The reason is the percpu_counter initialization > > can be called when we only have boot cpu and not all cpus are online. > > What's the meaning of boot cpu? Do you mean cpu 0? > Yes. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org