Red Hat Bugzilla – Bug 73353
kernel panic on raidstop
Last modified: 2007-11-30 17:06:52 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (compatible; Konqueror/3; Linux) Description of problem: Doing some experiments with the SAN here. After seeing that syncing 2 RAID 1's simultaneously is very slow, I wanted to speed things up a bit and did a raidstop /dev/md0 Result: kernel panic (see attachment) Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Make two RAID 1's (/dev/md[01]) using sd[ac]1 and sd[bd]1 on 4 logical drives on a LSI storage (~73 GB each) connected via QLogic 2300 HBA (driven by qla2x00.o) 2. Do a mkraid -R /dev/md[01] 3. Do a raidstop /dev/md1 Actual Results: Kernel panic Expected Results: Obvious..... Additional info: Compaq DL 580, 4xXeon 700, 4 GB, Onboard Smart-2 2x Qlogic 2300 FC HBA
Created attachment 74684 [details] Dump of the observation of /proc/mdstat and the kernel panic
qla2x00.o panics.. film at 11...at least it didn't eat your data this time. Why aren't you using qla2300.o ?
Well, see #73356 I just did it again without watching /proc/mdstat, and it worked...
Ok, I think I have to apologize... I just learned that the SAN guys made the four disks a 2x2 mirror, although they explicitly told me they hadn't... This explains some of the problems I had... Nevertheless, I think the issue concerning "raidstop" while having a "while true; do grep sync /proc/mdstat ; sleep 1 ; echo; done" seems to be generic to me...
This has been fixed in the e.12 kernel errata that was released at the beginning of this year. Larry Woodman