linux-kernel - Re: [PATCH 00/13] Clean up pmd_get

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Message-ID: <Y10atFd3sn1s1C6x@hirez.programming.kicks-ass.net>
Date:   Sat, 29 Oct 2022 14:21:08 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     x86@...nel.org, willy@...radead.org, torvalds@...ux-foundation.org,
        akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        aarcange@...hat.com, kirill.shutemov@...ux.intel.com,
        jroedel@...e.de, ubizjak@...il.com
Subject: Re: [PATCH 00/13] Clean up pmd_get_atomic() and i386-PAE

On Sat, Oct 22, 2022 at 01:14:03PM +0200, Peter Zijlstra wrote:
> Hi,
> 
> At long *long* last a respin of the patches that clean up pmd_get_atomic() and
> i386-PAE. I'd nearly forgotten why I did this, but the old posting gave clue
> that patch #7 was the whole purpose of me doing these patches.
> 
> Having carried these patches for at least 2 years, they recently hit a rebase
> bump against the mg-lru patches, which is what prompted this repost.
> 
> Linus' comment about try_cmpxchg64() (and Uros before him) made me redo those
> patches (see patch #10) which resulted in pxx_xchg64(). This in turn led to
> killing off set_64bit().
> 
> The robot doesn't hate on these patches and they boot in kvm (because who still
> has i386 hardware).
> 
> Patches also available at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/mm.pae

Aside from the whole discussions about TLB invalidates; I mean to commit
these patches to tip/x86/mm next week somewhere since they do improve
the current situation.

Holler if there's objections.