On 03/08/2010 07:35 AM, chris wrote:
I forwarding this to xen-devel because it appears to be a bug in dom0 kernel.
I recently experienced a strange issue with software raid1+0 under Xen
on a new machine. I was getting corruption in my guest volumes and
tons of kernel messages such as:
[305044.571962] raid0_make_request bug: can't convert block across
chunks or bigger than 64k 14147455 4
The full thread is located at http://marc.info/?t=126672694700001&r=1&w=2
Detailed output at http://pastebin.com/f6a52db74
It appears after speaking with the linux-raid mailing list that this
is due a bug which has been fixed but the fix is not included in the
dom0 kernel. I'm not sure what sources kernel 2.6.26-2-xen-amd64 is
based on, but since xenlinux is still at 2.6.18 I was assuming that
this bug would still exist.
There are a number of possible dom0 kernel in use. The xen.org
2.6.18-xen tree is still maintained on a bugfix basis. Are you seeing
the problem with 2.6.18-xen?
I don't know what 2.6.26-2-xen-amd64 is, but I'm guessing from the name
it is a Debian kernel. I don't know what its provenance is, but it is
not a xen.org supported kernel; if a fix is needed you should file a bug
against your distro.
Modern Xen kernels are based on 2.6.31.x and 2.6.32.x. See
http://wiki.xensource.com/xenwiki/XenParavirtOps and
http://wiki.xensource.com/xenwiki/XenDom0Kernels for more details.
J
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