From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from relay3.sgi.com ([192.48.152.1] helo=relay.sgi.com) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TsCsw-0003wV-Cp for kexec@lists.infradead.org; Mon, 07 Jan 2013 13:37:03 +0000 Date: Mon, 7 Jan 2013 07:39:35 -0600 From: Cliff Wickman Subject: Re: [PATCH v2] makedumpfile: request the kernel do page scans Message-ID: <20130107133935.GA1207@sgi.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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: d.hatayama@jp.fujitsu.com, kumagai-atsushi@mxc.nes.nec.co.jp, kexec@lists.infradead.org Cc: lisa.mitchell@hp.com An update on testing thise patches: > This version of the patch improves the consolidation of the mem_map table > that is passed to the kernel. See make_kernel_mmap(). > Particularly the seemingly duplicate pfn ranges generated on an older > (2.6.32-based, rhel6) kernel. On a 2TB machine (idle) machine: the crash kernel ran successfully in 512M the scan for unnecessary pages takes about 40 seconds it was a single scan, not cyclic On a 16TB machine (idle) machine: the crash kernel ran successfully in 512M there is a pause of about 4 minutes during makedumpfile initialization the scan for unnecessary pages takes about 4.8 minutes it was a single scan, not cyclic _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec