Looking at the proposed patch, the main portion is to implement the various IPI functions that get added to the APIC interface. There is on bit in xen_send_IPI_mask_allbutself() which I don't understand, but that is still unchanged in upstream code (I will ask about that on xen- devel). But otherwise either not many other places seem to use the IPI indirection via the APIC structure. Or handle NULL pointers more gracefully. There does not seem to be any related fixup changes in the kernel up today either. So I would think it should be safe for acceptance.
Just as a note, the proposed patch was part 1 of a bundle of two which was claimed to fix a certain hang with perf top. If this is observed on Precise EC2 kernels we should probably track it in another bug report. For that patch, there actually was a fixup, so that would be the following two: - 1ff2b0c303698e486f1e0886b4d9876200ef8ca5 xen: implement IRQ_WORK_VECTOR handler - 2f1bd67d544d3c086fb5101513f4b6c8f4291b43 xen/smp: unbind irqworkX when unplugging vCPUs -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1168350 Title: arch_trigger_all_cpu_backtrace() results in Oops on virtualized guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1168350/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
