Messages in this thread | | | Date | Fri, 23 Apr 2021 21:57:54 +0200 | From | Borislav Petkov <> | Subject | Re: Candidate Linux ABI for Intel AMX and hypothetical new related features |
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On Fri, Apr 23, 2021 at 03:35:30PM -0400, Len Brown wrote: > Yes. If a library decides to execute AMX instructions on behalf > of a task, the kernel will allocate an 8KB context switch buffer > on behalf of that task.
Again, the library should ask the kernel first whether it supports AMX. And the process should decide whether to use AMX - not the library on its own, on behalf of the process.
> Granted, if you find a reason to dislike AMX, the mechanisms to disable > it today are on a system-wide basis, not on a process or task basis.
Again, I don't dislike the feature. I don't want libraries jumping on new features without asking the process or the kernel first especially when those features have performance implications and need kernel support.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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