Hi all,<br><br>I used to use xen 3.4.2 and linux 2.6.18-xen kernels for both dom0 and domU, without any problems.<br><br>Recently,
I need to try io bandwidth control like dm-ioband in the new kernel
2.6.32 (dm-ioband has patches for this kernel). It gave me a lot of
problems if I want to upgrade the dom0 to 2.6.32. The following is what
I tried and the errors.<br>
<br><br>Xen: 3.4.3 (I need to stick with 3.4.x. 3.4.3 is the one that can run pvops)<br><br><b>First approach:</b><br>I
tried to download pvops from the git repository xen/stable-2.6.32.x.
The compilation was OK, but the initrd has a lot missing dependencies.
I tried to use --builtin to claim those missing modules in kernel.
However, with the generated initrd, dom0 can not boot. I got the error:
<b>unable to locate IOAPIC for GSIx and mount: could not find filesystem: /dev/root</b>.<br>
I enabled : CONFIG_SYSFS_DEPRECATED=y<span></span>,  CONFIG_SYSFS_DEPRECATED_V2=y and tried to use root=/dev/sdax or root=LABEL=/. No luck.<span style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Arial,&#39;Lucida Grande&#39;,sans-serif; font-size: 19px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px;"><span style="border-collapse: collapse; color: rgb(51, 51, 51); font-family: Verdana,Arial,Helvetica,sans-serif; font-size: 14px;"></span></span><br>

<br><b>Second approach:</b><br>Then I switched to the forward ported 2.6.32.13 kernel generated from the gentoo xen kernel patches.<br><br>Still
xen 3.4.3. After compilation, dom0 booted successfully. However I
previous domU which has 2.6.18-xen kernels can not boot. It has the
same error: <b>mount: could not find filesystem: /dev/root <br>
</b>Do I need to create a initrd for the domU? I didnt need one when dom0 is 2.6.18-xen kernel.<br><b><br></b>BTW. I dont see a PARAVIRT_GUEST config option in the forward ported 2.6.32 kernel<b>.<br><br></b>Any ideas?<br>

Thanks in advance!<b><br></b>