On Thu, Dec 22, 2011 at 05:25:48PM +0000, Alasdair G Kergon wrote:
> A kernel patch that fixes device-mapper/LVM devices is here:
> http://people.redhat.com/agk/patches/linux/editing/dm-block-sg_io-ioctls.patch
> ftp://sources.redhat.com/pub/dm/patches/2.6-unstable/editing/patches/dm-block-sg_io-ioctls.patch

Complete patchset to fix this proposed here:
https://lkml.org/lkml/2011/12/22/270

Alasdair

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