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Date: Wed, 12 Jun 2019 13:41:50 -0700
From: Dave Hansen <>
To: Andy Lutomirski <>
Cc: Marius Hillenbrand <>,,,,, Alexander Graf <>,
 David Woodhouse <>,
 the arch/x86 maintainers <>, Andy Lutomirski
 <>, Peter Zijlstra <>
Subject: Re: [RFC 00/10] Process-local memory allocations for hiding KVM

On 6/12/19 1:27 PM, Andy Lutomirski wrote:
>> We've discussed having per-cpu page tables where a given PGD is
>> only in use from one CPU at a time.  I *think* this scheme still
>> works in such a case, it just adds one more PGD entry that would
>> have to context-switched.
> Fair warning: Linus is on record as absolutely hating this idea. He
> might change his mind, but it’s an uphill battle.

Just to be clear, are you referring to the per-cpu PGDs, or to this
patch set with a per-mm kernel area?

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