Hi Gui, This is the patch that is queued for the next release: http://people.redhat.com/anderson/qemu_block_kvmclock_devices.patch I've tested it against the dumpfile that you made available. Thank you for your help, and to Paolo for the patch. Dave ----- "Gui Jianfeng" <guijianfeng@xxxxxxxxxxxxxx> wrote: > Gui Jianfeng wrote: > > Dave Anderson wrote: > >> ----- "Gui Jianfeng" <guijianfeng@xxxxxxxxxxxxxx> wrote: > >> > >>> Dave Anderson wrote: > >>>> ----- "Dave Anderson" <anderson@xxxxxxxxxx> wrote: > >>>> > >>>>> ----- "Paolo Bonzini" <pbonzini@xxxxxxxxxx> wrote: > >>>>> > >>>>>>> According to coredump, seems crash crashed at get_idt_base(). > >>>>>>> device_find_instance() fails to find "cpu" instance. > >>>>>> I think Dave already has a patch for this. > >>>>>> > >>>>>> Paolo > >>>>> The patch for get_idt_base() was put in crash version 5.0.4. > >>>>> Looking back at the mail archives, though, I don't see what > >>>>> version Gui is/was using? > >>>>> > >>>>> Dave > >>>> Now I see with the crash debug output that Gui is using version > >>>> 5.0.3. Can you please retry Paolo's patch on top of version > >>>> 5.0.4? > >>>> > >>> Hi Dave, > >>> > >>> I did apply Paolo's patch on top of version 5.0.4, the bug is > still there. > >>> I checked the 5.0.4 changelog and didn't see the fix for this. > >> Sorry, the 5.0.4 fix I was referring to was in get_kernel_base(), > which is > >> called with the result from get_idt_base(). So, just to be clear, > when it > >> crashes in get_idt_base(), it's because device_find_instance() call > returns > >> a NULL? > > > > That's true. > > > >> static uint64_t > >> get_idt_base(struct qemu_device_list *dl) > >> { > >> struct qemu_device_x86 *dx86 = (struct qemu_device_x86 > *) > >> device_find_instance (dl, "cpu", 0); > >> > >> return dx86->idt.base; > >> } > >> > >> So, it seems that with Paolo's patch, it can find the "block" device, but > >> then can no longer find the "cpu" device? > > > > Yes. > > > >> Can you make a vmlinux/vmcore pair available for me to download? > > > > Ok, will do later. > > Hi Dave, > > Please use the following link to download the vmlinux/vmcore > > http://dl.dropbox.com/u/4918988/core.dump > http://dl.dropbox.com/u/4918988/f12_vmlinux > -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
