[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Issue about domU missing interrupt
On Tue, 4 Dec 2012, Sander Eikelenboom wrote: > Tuesday, December 4, 2012, 12:01:05 PM, you wrote: > > > On Tue, Dec 04, 2012 at 10:15:58AM +0000, Jan Beulich wrote: > >> >>> On 04.12.12 at 04:07, "G.R." <firemeteor@xxxxxxxxxxxxxxxxxxxxx> wrote: > >> >> I had a quick look, and it doesn't look that hard to backport that > >> >> patch. > >> > > >> > Thanks, Mat. > >> > I'm glad to report that the patch do fix my problem. > >> > > >> > And yest it is really easy to port since the code did not change across > >> > the > >> > two release. > >> > The only change would be line numbers (3841 vs 3803) and one extra > >> > comments > >> > before this line: > >> > > >> > static int pt_msix_update_one(struct pt_dev *dev, int entry_nr) > >> > > >> > I'm not sure if you are going to release another maintenance version that > >> > include this patch, > >> > but I'll report this to Debain maintainer since it's about to freeze for > >> > v7.0 release and v4.2.0 will not make it. > >> > >> Any thoughts on backporting this to 4.1.x, now or after 4.1.4 is > >> out? > >> > > > It's already in Xen 4.2, it's confirmed to fix a bug in Xen 4.1, > > so I'd say it should be a candidate for Xen 4.1.4. > > Just tried switching the device model to "qemu-xen", seems this one isn't > upstream either. > (XEN) [2012-12-04 22:49:25] vmsi.c:108:d32767 Unsupported delivery mode 3 > > Running xen-unstable as of today, with device-model "qemu-xen" for this hvm > guest. > The patch is supposed to fix a bug affecting msi_translate but in upstream QEMU we haven't implemented msi_translate at all! So in this case the cause of the bug (and as a consequence the fix) must be a different one. > Sander > > > -- Pasi > > >> Jan > >> > >> > On Mon, Dec 3, 2012 at 9:58 PM, Mats Petersson > >> > <mats.petersson@xxxxxxxxxx>wrote: > >> > > >> >> On 03/12/12 13:19, Mats Petersson wrote: > >> >> > >> >>> On 03/12/12 13:14, G.R. wrote: > >> >>> > >> >>>> On Mon, Dec 3, 2012 at 6:15 PM, Mats Petersson > >> >>>> <mats.petersson@xxxxxxxxxx > >> > <mailto:mats.petersson@citrix.**com<mats.petersson@xxxxxxxxxx>>> > >> >>>> wrote: > >> >>>> > >> >>>> On 03/12/12 03:47, G.R. wrote: > >> >>>> > >> >>>> Hi developers, > >> >>>> I met some domU issues and the log suggests missing > >> >>>> interrupt. > >> >>>> Details from here: > >> >>>> http://www.gossamer-threads.**com/lists/xen/users/263938#** > >> >>>> 263938 <http://www.gossamer-threads.com/lists/xen/users/263938#263938> > >> >>>> In summary, this is the suspicious log: > >> >>>> > >> >>>> (XEN) vmsi.c:122:d32767 Unsupported delivery mode 3 > >> >>>> > >> >>>> I've checked the code in question and found that mode 3 is an > >> >>>> 'reserved_1' mode. > >> >>>> I want to trace down the source of this mode setting to > >> >>>> root-cause the issue. > >> >>>> But I'm not an xen developer, and am even a newbie as a xen > >> >>>> user. > >> >>>> Could anybody give me instructions about how to enable > >> >>>> detailed debug log? > >> >>>> It could be better if I can get advice about experiments to > >> >>>> perform / switches to try out etc. > >> >>>> > >> >>>> My SW config: > >> >>>> dom0: Debian wheezy (3.6 experimental kernel, xen 4.1.3-4) > >> >>>> domU: Debian wheezy 3.2.x stock kernel. > >> >>>> > >> >>>> Thanks, > >> >>>> Timothy > >> >>>> > >> >>>> Are you passing hardware (PCI Passthrough) to the HVM guest? > >> >>>> What are the exact messages in the DomU? > >> >>>> > >> >>>> > >> >>>> Yes, I'm doing PCI passthrough (the IGD, audio && USB controller). > >> >>>> But this is actually a PVHVM guest since debian stock kernel has PVOP > >> >>>> enabled. > >> >>>> And when I tried another PVOP disabled linux distro (openelec v2.0), I > >> >>>> did not see such msi related error message. > >> >>>> Actually, with that domU I do not see anything obvious wrong from the > >> >>>> log, but I also see nothing from panel (panel receive no signal and go > >> >>>> power-saving) :-( > >> >>>> > >> >>>> > >> >>>> Back to the issue I was reporting, the domU log looks like this: > >> >>>> > >> >>>> Dec 2 21:52:44 debvm kernel: [ 1085.604071] > >> >>>> [drm:i915_hangcheck_ring_idle] > >> >>>> *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 3354, at > >> >>>> 3354], missed IRQ? > >> >>>> Dec 2 21:56:50 debvm kernel: [ 1332.076071] > >> >>>> [drm:i915_hangcheck_ring_idle] > >> >>>> *ERROR* Hangcheck timer elapsed... render ring idle [waiting on > >> >>>> 11297, at > >> >>>> 11297], missed IRQ? > >> >>>> Dec 2 22:32:48 debvm kernel: [ 7.220073] hda-intel: azx_get_response > >> >>>> timeout, switching to polling mode: last cmd=0x000f0000 > >> >>>> Dec 2 22:45:32 debvm kernel: [ 776.392084] hda-intel: No response from > >> >>>> codec, disabling MSI: last cmd=0x002f0600 > >> >>>> Dec 2 22:45:33 debvm kernel: [ 777.400075] hda_intel: azx_get_response > >> >>>> timeout, switching to single_cmd mode: last cmd=0x002f0600 > >> >>>> > >> >>>> > >> >>>> Thanks, > >> >>>> Timothy > >> >>>> > >> >>> It does sound like there is a fix in 4.2.0, as indicated by Jan, that > >> >>> fixes this. I'm not fully clued up to what the policy for backporting > >> >>> fixes are, and I haven't looked at the complexity of the fix itself, > >> >>> but > >> >>> either updating to the 4.2.0 or a (personal) backport sounds like the > >> >>> right solution here. > >> >>> > >> >> I had a quick look, and it doesn't look that hard to backport that > >> >> patch. > >> >> > >> >> -- > >> >> Mats > >> >> > >> >> > >> >>> Unfortunately, I hadn't seen Jan's reply by the time I wrote my > >> >>> response > >> >>> to your original email. > >> >>> > >> >>> -- > >> >>> Mats > >> >>> > >> >>> ______________________________**_________________ > >> >>> Xen-devel mailing list > >> >>> Xen-devel@xxxxxxxxxxxxx > >> >>> http://lists.xen.org/xen-devel > >> >>> > >> >>> > >> >>> > >> >> > >> >> ______________________________**_________________ > >> >> Xen-devel mailing list > >> >> Xen-devel@xxxxxxxxxxxxx > >> >> http://lists.xen.org/xen-devel > >> >> > >> > >> > >> > >> _______________________________________________ > >> Xen-devel mailing list > >> Xen-devel@xxxxxxxxxxxxx > >> http://lists.xen.org/xen-devel > > > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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