From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SUGye-0004DM-QB for kexec@lists.infradead.org; Tue, 15 May 2012 12:35:46 +0000 Date: Tue, 15 May 2012 08:35:38 -0400 From: Don Zickus Subject: Re: makedumpfile memory usage grows with system memory size Message-ID: <20120515123538.GR32472@redhat.com> References: <20120410.085824.193685565.d.hatayama@jp.fujitsu.com> <20120410125205.GA21801@redhat.com> <20120412124040.bad03498.kumagai-atsushi@mxc.nes.nec.co.jp> <20120412.164714.39159547.d.hatayama@jp.fujitsu.com> <20120427164649.9932a33f.kumagai-atsushi@mxc.nes.nec.co.jp> <20120427125214.GF28185@redhat.com> <20120511101952.7530db09.kumagai-atsushi@mxc.nes.nec.co.jp> <20120511132601.GY32472@redhat.com> <20120515145705.d6daeb68.kumagai-atsushi@mxc.nes.nec.co.jp> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20120515145705.d6daeb68.kumagai-atsushi@mxc.nes.nec.co.jp> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Atsushi Kumagai Cc: oomichi@mxs.nes.nec.co.jp, d.hatayama@jp.fujitsu.com, kexec@lists.infradead.org, vgoyal@redhat.com On Tue, May 15, 2012 at 02:57:05PM +0900, Atsushi Kumagai wrote: > Hello Don, > > On Fri, 11 May 2012 09:26:01 -0400 > Don Zickus wrote: > > > > Thank you for your reply, Don, Vivek. > > > > > > As Don said, I tried to change the method to exclude free pages and > > > planed to resolve the memory consumption issue after it, because > > > parsing free list repeatedly may cause a performance issue. > > > > > > However, I'm thinking that to fix the size of memory consumption is more > > > important than to resolve a performance issue for large system. > > > > > > So I'm afraid that I would like to change the plan as: > > > > > > 1. Implement "iterating filtering processing" to fix the size of memory > > > consumption. At this stage, makedumpfile will parse free list repeatedly > > > even though it may cause a performance issue. > > > > > > 2. Take care of the performance issue after the 1st step. > > > > Hello Atsushi-san, > > > > Hmm. The problem with the free list is that the addresses are in random > > order, hence the reason to parse it repeatedly, correct? > > Yes. > > > I figured, now that you have a solution to parse the addresses in a linear > > way (the changes you made a couple of weeks ago), you would just continue > > with that. With that complete, we can look at the performance issues and > > solve them then. > > > > But it is up to you. You are willing to do the work, so I will defer to > > your judgement on how best to proceed. :-) > > What I wanted to tell you was I want to resolve the memory consumption issue > as soon as possible. In other words, I think the method to exclude free pages > is not so important. > I'll continue to work with the method which is easy to implement. Ok. I look forward to your results. Thanks for your effort. Cheers, Don _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec