Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757086Ab3DPIDy (ORCPT ); Tue, 16 Apr 2013 04:03:54 -0400 Received: from e06smtp15.uk.ibm.com ([195.75.94.111]:45514 "EHLO e06smtp15.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753773Ab3DPIDs (ORCPT ); Tue, 16 Apr 2013 04:03:48 -0400 Date: Tue, 16 Apr 2013 10:03:40 +0200 From: Heiko Carstens To: Simon Jeons Cc: Zhouping Liu , linux-mm@kvack.org, LKML , caiqian , Caspar Zhang , Martin Schwidefsky Subject: Re: [BUG][s390x] mm: system crashed Message-ID: <20130416080340.GA23856@osiris> References: <156480624.266924.1365995933797.JavaMail.root@redhat.com> <2068164110.268217.1365996520440.JavaMail.root@redhat.com> <20130415055627.GB4207@osiris> <516B9B57.6050308@redhat.com> <20130416075047.GA4184@osiris> <516D044B.3040300@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <516D044B.3040300@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13041608-0342-0000-0000-000004C02EA4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 891 Lines: 20 On Tue, Apr 16, 2013 at 03:56:59PM +0800, Simon Jeons wrote: > Hi Heiko, > >If you have some time, could you please repeat your test with the kernel > >command line option " user_mode=home "? > > What's the meaning of this command line? I can't find it in > Documentation/kernel-parameters.txt/ It switches the architectural address space where kernel and user space reside in. We only recently switched the default address space for user space from home space to primary space, since that's needed for kvm. The user space runs in home space mode will be removed in the future; we keep it currently as fallback, just in case something breaks. -- 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/