Re: [GIT PULL] x86/mm changes for v4.14: PCID support, 5-level paging support, Secure Memory Encryption support

From: Linus Torvalds
Date: Tue Sep 05 2017 - 17:45:17 EST


On Tue, Sep 5, 2017 at 2:40 PM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>
> Does your laptop CPU have PCID support by any chance? The CPU coming
> out of resume with PCID disabled and us not properly re-enabling it
> might be a possible failure mode.

It does have pcid. It's a -7-6560U in the prev-gen XPS 13 (aka "9350").

I have bisected a bit deeper, and the pcid code is definitely in that
bisection window still. But are a fair number of other commits (about
160 right now)

Linus