Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754882Ab3FKPdd (ORCPT ); Tue, 11 Jun 2013 11:33:33 -0400 Received: from zimbra.linbit.com ([212.69.161.123]:38342 "EHLO zimbra.linbit.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754751Ab3FKPd2 (ORCPT ); Tue, 11 Jun 2013 11:33:28 -0400 Date: Tue, 11 Jun 2013 17:33:27 +0200 From: Lars Ellenberg To: Fengguang Wu Cc: Philipp Reisner , drbd-user@lists.linbit.com, linux-kernel@vger.kernel.org Subject: Re: [drbd?] Kernel panic - not syncing: Out of memory and no killable processes... Message-ID: <20130611153326.GK20369@soda.linbit> Mail-Followup-To: Fengguang Wu , Philipp Reisner , drbd-user@lists.linbit.com, linux-kernel@vger.kernel.org References: <20130607023154.GA13344@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20130607023154.GA13344@localhost> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1480 Lines: 40 On Fri, Jun 07, 2013 at 10:31:54AM +0800, Fengguang Wu wrote: > Greetings, > > My "kvm -m 256" reliably goes Out Of Memory after this commit. It may > not be the only one that eats up the memory, however I wonder how much > memory consumption this commit added? Thanks! > Out of curiosity, what exactly is it you are doing there? What project or appliance or behaviour or product or paper is the goal? We scale certain mempools and reserves with DRBD_MAX_BIO_SIZE/PAGE_SIZE * minor_count. DRBD_MAX_BIO_SIZE has been increased by this patch, resulting in more memory allocated to those reserved pools. Please just scale down the "minor_count" parameter. You can use the module parameter (e.g. modprobe drbd minor_count=8), or, compiled in, use the kernel command line parameter drbd.minor_count=8. Though "minor_count" at some point used to be the hard limit for the number of minor devices (allocation of an array of corresponding size), that has long since changed, and now it is really only used as scaling factor for these mempools. Lars -- : Lars Ellenberg : LINBIT | Your Way to High Availability : DRBD/HA support and consulting http://www.linbit.com DRBD? and LINBIT? are registered trademarks of LINBIT, Austria. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/