From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Re: more info on the hang with 2.6.15-rc5 Date: Sun, 08 Jan 2006 13:20:59 -0500 Message-ID: <43C1580B.9020609@tmr.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Sebastian Kuzminsky Cc: linux-raid@vger.kernel.org, linux-lvm@redhat.com List-Id: linux-raid.ids Sebastian Kuzminsky wrote: >Now it works, but I dont trust it one bit. > >I had been seeing almost immediate, perfectly repeatable hard lockups >in 2.6.15-rc5 and 2.6.15-rc5-mm3, when using sata_mv, RAID, and LVM >together. Nothing in the syslog or on the console, and the system is >totally unresponsive to the keyboard & network. > >My hardware setup is: four Seagate Barracuda 500 GB disks, on a Marvell >MV88SX6081 8-port SATA-II PCI-X controller, on a PCI-X bus (64/66). > >The disks work great when accessed directly. They work great when used >as four PVs for LVM, and when assembled into a 4-disk RAID-6. > >But when I make a RAID-6 array out of them, and use the array as a PV, >the system would hang completely, within seconds. (This is with LVM >2.02.01, libdevicemapper 1.02.02, and dm-driver 4.5.0.) > >I turned on all the debugging options in the kernel config hoping to get >some insight, but this "debug" kernel doesnt crash. It's running fine, >and I'm pounding on it. A timing problem in the interaction between >LVM and RAID? Some kind of wierd heisenbug.... > > >I'd be happy to do any debugging tests people suggest. > > > > I've been waiting for more info on this, did it get fixed? 2.6.15? -- bill davidsen CTO TMR Associates, Inc Doing interesting things with small computers since 1979