From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756176AbZKWTln (ORCPT ); Mon, 23 Nov 2009 14:41:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756101AbZKWTll (ORCPT ); Mon, 23 Nov 2009 14:41:41 -0500 Received: from out01.mta.xmission.com ([166.70.13.231]:38533 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754779AbZKWTlj (ORCPT ); Mon, 23 Nov 2009 14:41:39 -0500 To: Amerigo Wang Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, Andi Kleen , Neil Horman Subject: Re: [Resend Patch] kexec: allow to shrink reserved memory References: <20091123093958.4963.38592.sendpatchset@localhost.localdomain> From: ebiederm@xmission.com (Eric W. Biederman) Date: Mon, 23 Nov 2009 11:41:40 -0800 In-Reply-To: <20091123093958.4963.38592.sendpatchset@localhost.localdomain> (Amerigo Wang's message of "Mon\, 23 Nov 2009 04\:37\:02 -0500") Message-ID: User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-XM-SPF: eid=;;;mid=;;;hst=in02.mta.xmission.com;;;ip=76.21.114.89;;;frm=ebiederm@xmission.com;;;spf=neutral X-SA-Exim-Connect-IP: 76.21.114.89 X-SA-Exim-Mail-From: ebiederm@xmission.com X-SA-Exim-Version: 4.2.1 (built Thu, 25 Oct 2007 00:26:12 +0000) X-SA-Exim-Scanned: No (on in02.mta.xmission.com); Unknown failure Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Amerigo Wang writes: > This patch implements shrinking the reserved memory for crash kernel, > if it is more than enough. > > For example, if you have already reserved 128M, now you just want 100M, > you can do: > > # echo $((100*1024*1024)) > /sys/kernel/kexec_crash_size > > Note, you can only do this before loading the crash kernel. Acked-by: "Eric W. Biederman" Looks good to me. Eric