Messages in this thread | | | Subject | Re: [PATCH 2/2] KVM: x86: allow BSP to handle INIT IPIs like APs do | From | Paolo Bonzini <> | Date | Mon, 8 Feb 2016 18:44:09 +0100 |
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On 08/02/2016 18:27, Bruce Rogers wrote: > I had read that, but I though this was speaking from the perspective of the > SMP aware BIOS code only.
It says "logical processor", so I cannot really see how it can be interpreted that way. The BSP jumps to 0xFFFFFFF0, the APs go into wait-for-SIPI state.
> I certainly could be wrong about my above interpretation, but with these > changes I'm proposing, things work well for the test case of manually onlining > the BSP after the crash kernel has been started (via kexec -e on a AP processor > with maxcpus=1 on the crash kernel command line). From looking through the > kernel git history it appears this sequence of events was explicitly supported > quite a while ago, and we've got a customer who uses this for fast recovery from > a guest kernel crash.
You need to comment on the output of trace-cmd for KVM events, or provide a full reproducer, or at the very least point me to the kernel code that you're referring to. Otherwise I just cannot understand what you're talking about; sorry. :(
Paolo
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