From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Van Assche Subject: Re: multipath IB/srp fail-over testing lands up in dump stack in swiotlb_alloc_coherent() Date: Tue, 14 Jun 2016 14:25:15 +0200 Message-ID: References: <19156300.41876496.1465771227395.JavaMail.zimbra@redhat.com> <2d316ddf-9a2a-3aba-cf2d-fcdaafbaa848@sandisk.com> <20160613140747.GL5408@leon.nu> <946373818.41993264.1465827597452.JavaMail.zimbra@redhat.com> <887623939.42004497.1465831339845.JavaMail.zimbra@redhat.com> <450384210.42057823.1465857004662.JavaMail.zimbra@redhat.com> <1964187258.42093298.1465869387551.JavaMail.zimbra@redhat.com> <11e680c4-84b3-1cd6-133c-36f71bd853d0@sandisk.com> <20160614120833.GO5408@leon.nu> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20160614120833.GO5408-2ukJVAZIZ/Y@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org Cc: Laurence Oberman , Yishai Hadas , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org On 06/14/2016 02:08 PM, Leon Romanovsky wrote: > On Tue, Jun 14, 2016 at 11:24:28AM +0200, Bart Van Assche wrote: >> On 06/14/2016 03:56 AM, Laurence Oberman wrote: >>> Tracing [ ... ] >> >> Can you try to set the kernel command line parameter swiotlb to a value that >> is a multiple of its default (64MB), reboot and see whether that helps? See >> also Documentation/kernel-parameters.txt in the kernel tree. > > Do you think that 64MB is not enough for this scenario? Hello Leon, Does this mean that you think that the "swiotlb buffer is full" messages reported by Laurence could be caused by something else than hitting the swiotlb limit? Bart. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html