Messages in this thread | | | Date | Mon, 25 Jul 2022 14:23:20 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCHv7 02/14] mm: Add support for unaccepted memory |
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On Fri, Jul 22, 2022 at 12:30:36PM -0700, Dave Hansen wrote: > Sure does... *Something* has to manage the cache coherency so that old > physical aliases of the converted memory don't write back and clobber > new data. But, maybe the hardware is doing that now.
Let's hope.
> Yeah, that two-tier system is the way it's happening today from what > I understand. This whole conversation is about how to handle the >4GB > memory.
Would it be possible to pre-accept a bunch of mem - think "pre-fault" - from userspace?
I.e., I'm thinking some huge process is going to start in the VM, VM userspace goes and causes a chunk of memory to be pre-accepted and then the process starts and runs more-or-less smoothly as the majority of its memory has already been "prepared".
Or does that not make any sense from mm perspective?
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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