Re: [dm-devel] Block regression since 3.1-rc3
From: Christophe Saout
Date: Tue Oct 04 2011 - 11:06:53 EST
> > Line 323 is this one: BUG_ON(!rq->bio || rq->bio != rq->biotail);
> > The bug is not specific to GFS2, I also get it when using an ext3 mount
> > on that multipath storage pool when writing to a file.
> Great, thanks! I tried ext3 and ext4 as well, and was unable to trigger
> this problem. I setup a linear volume on top of a multipath device. Is
> that the configuration you are using? Anyway, this may be enough to get
> me on the right path...
Yes - the device-mapper tables looks like:
vserv81:/root # dmsetup table RAID_A-test.root
0 20971520 linear 253:6 384
(this is one the FS which causes the crash when mounting via ext3)
And 253:6 is the multipath device:
vserv81:/root # dmsetup table 3600d023100065bef0000000009f337c0
0 15626018816 multipath 0 0 2 1 round-robin 0 1 1 8:16 1000 round-robin 0 1 1 8:48 1000
And 8:16, 8:48 are two qla2xxx FC ports.
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