From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Bottomley Subject: Re: mvsas panics and dies when attached to a port extender on newer kernels Date: Tue, 14 Apr 2015 14:16:05 -0700 Message-ID: <1429046165.2209.54.camel@HansenPartnership.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: Received: from bedivere.hansenpartnership.com ([66.63.167.143]:48444 "EHLO bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754248AbbDNVQG (ORCPT ); Tue, 14 Apr 2015 17:16:06 -0400 In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Adam Talbot Cc: linux-scsi@vger.kernel.org On Tue, 2015-04-14 at 14:03 -0700, Adam Talbot wrote: > To make a very long debugging story short, I think there is an issues/bug > with the mvsas driver. It works, with older kernels, and breaks on > newer kernels. > > My Debian Jessie system was running great on a 3.18 kernel. Changed > cases to a newer supermicro case with a SAS expander backplane (SAS933EL). That > was the only hardware change. Now, when ever I boot, the system kernel panics. > > 3.2.65-1+deb7u2 works > 3.9.0 Gentoo CD works > 3.16+ all fail > Attached are 3 kernel panics on 3.16+ kernels. > > Motherboard is a Supermicro X8SIE, with a "Marvell Technology Group Ltd. > 88SE6440 SAS/SATA PCIe controller" > > Is this a known bug? Well, you're the only person that's reported it so far. I think based on the above is that your configuration is a single expander attached SATA device ... and if you move it to be non expander attached it works fine? > At this point I have two options: > Stick with the old kernel (yuck) > Buy a new card running a better supported chipset > > Any help would be greatly appreciated > Thanks You didn't specify: does 3.15 work? At least the highest working kernel version would help me narrow down potential problems. James