Messages in this thread | | | Date | Wed, 17 Jun 2015 14:11:27 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH V1] x86, espfix: postpone the initialization of espfix stack for AP |
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On 06/17/2015 02:04 PM, Borislav Petkov wrote: >> >> It isn't *at all* obvious to me at least that if the GFP_KERNEL >> allocation fails we may not get rescheduled on another CPU and/or get stuck. >> >> I'm starting to think that the right thing to do is to allocate these on >> the CPU that is bringing up the other CPU, at the same time we allocate >> the percpu area. This won't affect offline CPUs. > > Btw, as part of experimenting for something else, I was able to trigger > this even on a guest here. It is an insane guest though: 16 NUMA nodes, > with 8 cores each: >
Is this reliable?
-hpa
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