Messages in this thread | | | From | Florian Weimer <> | Subject | Re: Candidate Linux ABI for Intel AMX and hypothetical new related features | Date | Mon, 03 May 2021 07:18:16 +0200 |
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* Len Brown:
> 5. If the feature is enabled in XCR0, the user happily uses it. > > For AMX, Linux implements "transparent first use" > so that it doesn't have to allocate 8KB context switch > buffers for tasks that don't actually use AMX. > It does this by arming XFD for all tasks, and taking a #NM > to allocate a context switch buffer only for those tasks > that actually execute AMX instructions.
What happens if the kernel cannot allocate that additional context switch buffer?
Thanks, Florian
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