[Xen-devel] Re: ia64 tripping over BUG_ON from cset 9224

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To:

Alex Williamson <alex.williamson@xxxxxx>

Subject:

[Xen-devel] Re: ia64 tripping over BUG_ON from cset 9224

From:

Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>

Date:

Tue, 14 Mar 2006 14:38:56 +0000

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xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>

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On 14 Mar 2006, at 05:16, Alex Williamson wrote:

   When booting an ia64 guest domain on current xen-unstable.hg we hit
BUG_ON(info->rq != NULL) in blkfront/vbd.c:xlvbd_alloc_gendisk().
Skipping this BUG_ON allows a domU to boot normally using a file backed
vbd.  Is this BUG_ON really necessary, or are we missing something
important here on ia64?  Thanks,

I fixed this now (changeset 9226). The blkfront_info structure wasn'tbeing initialised to zeroes on allocation, so the BUG_ON was spuriouslytriggering if you got unlucky.


 -- Keir


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