Hi guys,
On 12/02/2010 01:52 AM, Simon Rowe wrote:
On Wednesday 01 Dec 2010 16:49:42 Jonathan Ludlam wrote:
Hum. I'm not too sure myself about kernel issues - Simon Rowe (cc'd) may be
able to help?
Can you describe your setup a little more? What devices are under md?
Thanks for following up on this.
I tried the following two and both ended up with Oops.
1. just two regular HDDs --- /dev/sdc and /dev/sde or whatever.
Here's how I reproduced just now.Very soon after dd, kernel panics.
$ mdadm --create /dev/md0 --level=mirror --raid-devices=2 /dev/sdc /dev/sde
mdadm: /dev/sdc appears to be part of a raid array:
level=raid1 devices=2 ctime=Mon Nov 29 15:52:53 2010
mdadm: /dev/sde appears to be part of a raid array:
level=raid1 devices=2 ctime=Mon Nov 29 09:34:34 2010
Continue creating array? y
mdadm: array /dev/md0 started.
$ dd if=/dev/zero of=/dev/md0 bs=1M
2. dm linear devices which are on top of iscsi
mdadm --create /dev/mirror/000008bc --auto=md --bitmap=internal --metadata=0
--run --bitmap-chunk=65536 --delay=5 --level=1 --assume-clean
--raid-devices=3 /dev/mapper/00000001-00000003 /dev/mapper/00000002-000002d7
/dev/mapper/00000003-0000050a
Interestingly, his doesn't cause kernel panic; similar stack trace shows up
in dmsg and mdadm stalls.
Best,
Tomoe
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