linux-kernel - Re: [GIT PULL] x86/mm changes for v5.9

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Message-ID: <20200806185723.GA24304@suse.de>
Date:   Thu, 6 Aug 2020 20:57:23 +0200
From:   Joerg Roedel <jroedel@...e.de>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] x86/mm changes for v5.9

On Thu, Aug 06, 2020 at 03:10:34PM +0200, Ingo Molnar wrote:
> 
> * Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> > So apparently the "the page-table pages are all pre-allocated now" is
> > simply not true. Joerg?

It pre-allocates the whole vmalloc/ioremap PUD/P4D pages, but I actually
only tested it with 4-level paging, as I don't have access to 5-level
paging hardware.

I'll try to make sense of that oops.

> > Unless somebody can figure this out fairly quickly, I think it should
> > just be reverted.
> 
> Agreed. Joerg?

Yeah, please just revert that commit for now until I have an idea what
went wrong.

	
	Joerg