linux-kernel - Re: [PATCH 1/2] mm: Allow architectures to request 'old' entries when prefaulting

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Date:   Sun, 27 Dec 2020 15:12:38 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Hugh Dickins <hughd@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Damian Tometzki <linux@...etzki.de>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Matthew Wilcox <willy@...radead.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Will Deacon <will@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Jan Kara <jack@...e.cz>, Minchan Kim <minchan@...nel.org>,
        Vinayak Menon <vinmenon@...eaurora.org>,
        Android Kernel Team <kernel-team@...roid.com>
Subject: Re: [PATCH 1/2] mm: Allow architectures to request 'old' entries when prefaulting

On Sun, Dec 27, 2020 at 2:35 PM Hugh Dickins <hughd@...gle.com> wrote:
>
> Yes, this one passes my testing on x86_64 and on i386.

Ok, good.

> But...
>
> ... Damian very helpfully reports that it does not build when
> CONFIG_TRANSPARENT_HUGEPAGE is not set, since the "static " has
> not been removed from the alternative definition of do_set_pmd().

Ok, your fix for that folded in, and here's yet another version.
Damian, hopefully your configuration builds and works too now.

But obviously it's too late for this merge window that I'm just about
to close, so I hope Andrew can pick this up - I hope it's now in good
enough shape to go into -mm and then we can do it next merge window or
something.

Andrew?

                  Linus

View attachment "0001-mm-Cleanup-faultaround-and-finish_fault-codepaths.patch" of type "text/x-patch" (16010 bytes)