Re: [Xen-devel] Xen 4.1 rc1 test report (xl bits)

[Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>]

On Sat, 2011-01-22 at 09:39 +0000, Zheng, Shaohui wrote:
> Hi, All
>       Intel QA conducted a full validation for xen 4.1 rc1, it includes VT-x, 
> VT-d,  SRIOV, RAS, TXT and xl tools testing. 24 issues were exposed. Refer 
> the bug list, please.
> 
>       We already assigned 14 bugs to Intel developers (which has an 'Intel' 
> tag in the bug title), most of the rest 10 bugs are related xl command.  For 
> the these bugs, need community's help to fix them. 
> 
> Version information:
> Change Set: 22764:75b6287626ee
> pvops dom0: 862ef97190f6b54d35c76c93fb2b8fadd7ab7d68
> ioemu : 1c304816043c0ffe14d20d6006d6165cb7fddb9b

Thanks.

> xl command(7 bugs)
> 1. xl does not check the duplicated configure file and image file (Community)
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1711

Yes this is kind of known about, we give the user a lot of rope. We had
already discussed that it's a bug for two domains to have the same name.
A check for this condition would catch the 'oops I ran the same config
twice' case.

As for going everywhere and preventing two domains from sharing a disk
image it would be a bit more far-reaching and we'd need to think about
legit cases where people might use shared r/w disk images with a
separate synchronisation protocol...

> 2. [vt-d] Can not detach the device which was assigned statically (Community)
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1717
> 3. guest shows white screen when boot guest with NIC assigned (Community)
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1712
> 4. memory corruption was reported by "xl" with device pass-throu (Community)
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1713
> 5. [vt-d] fail to passthrou two or more devices to guest (Community)
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1710

We are well aware that pci passthrough is buggy in xl. At the very
least, not all the safety checks are done. There are also problems with
IRQ's becoming unmapped when one of two pass-through devices which share
one or more IRQ's is detached. There are probably other issues too.

The heap corruption in xl looks particularly worrisome I will try find a
moment to take a look at that one.

> 6. Guest network broken after do SAVE/RESTOR with xl (Community)
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1703

Sounds like a real clanger.

> 7. Too many error information showed when destroy an inexistent guest 
> (Community)
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1714

A three line fix?

Gianni


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