Hi, I''m running Xen 4.2.0 with Linux kernel 3.7.0 and I''m seeing a flood of these messages in xen dmesg: (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 What does that mean and is it something that I should worry about? -- Valtteri Kiviniemi _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
>>> On 17.12.12 at 17:48, Valtteri Kiviniemi <kiviniemi.valtteri@gmail.com> wrote: > I''m running Xen 4.2.0 with Linux kernel 3.7.0 and I''m seeing a flood of > these messages in xen dmesg: > > (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 > (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 > (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 > (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 > (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 > (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 > (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 > > What does that mean and is it something that I should worry about?It means that the hypervisor recovered from #GP faults several times. What exactly it was that faulted you''d need to look up by translating the addresses above and resolving them to source locations. That''ll also tell you whether you ought to be worried. A common example of these happening is Xen carrying out MSR accesses on behalf of the kernel, when the MSR actually isn''t implemented (i.e. the kernel itself also is prepared to handle faults upon accessing them). Jan
Sander Eikelenboom
2012-Dec-17 17:55 UTC
Re: (XEN) traps.c:3156: GPF messages in xen dmesg
Monday, December 17, 2012, 5:57:24 PM, you wrote:>>>> On 17.12.12 at 17:48, Valtteri Kiviniemi <kiviniemi.valtteri@gmail.com> wrote: >> I''m running Xen 4.2.0 with Linux kernel 3.7.0 and I''m seeing a flood of >> these messages in xen dmesg: >> >> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >> >> What does that mean and is it something that I should worry about?> It means that the hypervisor recovered from #GP faults several > times. What exactly it was that faulted you''d need to look up by > translating the addresses above and resolving them to source > locations. That''ll also tell you whether you ought to be worried.> A common example of these happening is Xen carrying out MSR > accesses on behalf of the kernel, when the MSR actually isn''t > implemented (i.e. the kernel itself also is prepared to handle > faults upon accessing them).Hi Jan, Perhaps related to a previous discussion (with a open end ..) http://lists.xen.org/archives/html/xen-devel/2012-09/msg01599.html -- Sander> Jan
>>> On 17.12.12 at 18:55, Sander Eikelenboom <linux@eikelenboom.it> wrote:> Monday, December 17, 2012, 5:57:24 PM, you wrote: > >>>>> On 17.12.12 at 17:48, Valtteri Kiviniemi <kiviniemi.valtteri@gmail.com> wrote: >>> I''m running Xen 4.2.0 with Linux kernel 3.7.0 and I''m seeing a flood of >>> these messages in xen dmesg: >>> >>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>> >>> What does that mean and is it something that I should worry about? > >> It means that the hypervisor recovered from #GP faults several >> times. What exactly it was that faulted you''d need to look up by >> translating the addresses above and resolving them to source >> locations. That''ll also tell you whether you ought to be worried. > >> A common example of these happening is Xen carrying out MSR >> accesses on behalf of the kernel, when the MSR actually isn''t >> implemented (i.e. the kernel itself also is prepared to handle >> faults upon accessing them). > > Perhaps related to a previous discussion (with a open end ..) > http://lists.xen.org/archives/html/xen-devel/2012-09/msg01599.htmlNot impossible, but iirc those would generally be accompanied by SIGSEGV-s and/or kernel crashes in some guest. Jan
Sander Eikelenboom
2012-Dec-18 08:51 UTC
Re: (XEN) traps.c:3156: GPF messages in xen dmesg
Tuesday, December 18, 2012, 8:49:18 AM, you wrote:>>>> On 17.12.12 at 18:55, Sander Eikelenboom <linux@eikelenboom.it> wrote:>> Monday, December 17, 2012, 5:57:24 PM, you wrote: >> >>>>>> On 17.12.12 at 17:48, Valtteri Kiviniemi <kiviniemi.valtteri@gmail.com> wrote: >>>> I''m running Xen 4.2.0 with Linux kernel 3.7.0 and I''m seeing a flood of >>>> these messages in xen dmesg: >>>> >>>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>>> (XEN) traps.c:3156: GPF (0060): ffff82c480159247 -> ffff82c4802170e4 >>>> >>>> What does that mean and is it something that I should worry about? >> >>> It means that the hypervisor recovered from #GP faults several >>> times. What exactly it was that faulted you''d need to look up by >>> translating the addresses above and resolving them to source >>> locations. That''ll also tell you whether you ought to be worried. >> >>> A common example of these happening is Xen carrying out MSR >>> accesses on behalf of the kernel, when the MSR actually isn''t >>> implemented (i.e. the kernel itself also is prepared to handle >>> faults upon accessing them). >> >> Perhaps related to a previous discussion (with a open end ..) >> http://lists.xen.org/archives/html/xen-devel/2012-09/msg01599.html> Not impossible, but iirc those would generally be accompanied > by SIGSEGV-s and/or kernel crashes in some guest.> JanValtteri, Are you by any chance using pci-passthrough to one of your domains ? -- Sander
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