From: Linus Walleij <linus.walleij@linaro.org>
To: Matthew Wilcox <willy@infradead.org>,
Russell King <rmk+kernel@armlinux.org.uk>
Cc: "Arnd Bergmann" <arnd@arndb.de>,
ksummit@lists.linux.dev, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linuxppc-dev@lists.ozlabs.org, linux-mips@vger.kernel.org,
linux-mm@kvack.org, imx@lists.linux.dev,
"Christophe Leroy" <christophe.leroy@csgroup.eu>,
"Richard Weinberger" <richard@nod.at>,
"Lucas Stach" <l.stach@pengutronix.de>,
"Geert Uytterhoeven" <geert+renesas@glider.be>,
"Ankur Arora" <ankur.a.arora@oracle.com>,
"David Hildenbrand" <david@redhat.com>,
"Mike Rapoport" <rppt@kernel.org>,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Suren Baghdasaryan" <surenb@google.com>,
"Ira Weiny" <ira.weiny@intel.com>, "Nishanth Menon" <nm@ti.com>,
"Heiko Stübner" <heiko@sntech.de>,
"Alexander Sverdlin" <alexander.sverdlin@gmail.com>,
"Chester A. Unal" <chester.a.unal@arinc9.com>,
"Sergio Paracuellos" <sergio.paracuellos@gmail.com>,
"Andreas Larsson" <andreas@gaisler.com>
Subject: Re: [TECH TOPIC] Reaching consensus on CONFIG_HIGHMEM phaseout
Date: Wed, 10 Sep 2025 11:49:55 +0200 [thread overview]
Message-ID: <CACRpkdZZZNV5BdNhyXEK__=EJLjDtAEsc2Kv4Tv53+=Mv-8R=w@mail.gmail.com> (raw)
In-Reply-To: <aMDYdp3H-yOHU1Pm@casper.infradead.org>
On Wed, Sep 10, 2025 at 3:46 AM Matthew Wilcox <willy@infradead.org> wrote:
> I don't mind that the feature remains ... unless it causes us trouble.
> Which it currently does. Perhaps we could start by removing HIGHPTE?
> There was a certain amount of complexity introduced into the page fault
> path when support for that was introduced. x86 removed support for it,
> so it's just ARM left before we can remove the complexity again.
I sent an RFC patch so we can see what Russell has to say about this,
it is currently only enabled by default on the VT8500 machine.
Yours,
Linus Walleij
next prev parent reply other threads:[~2025-09-10 9:50 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-09 21:23 Arnd Bergmann
2025-09-09 21:38 ` H. Peter Anvin
2025-09-09 22:24 ` Linus Torvalds
2025-09-09 22:39 ` H. Peter Anvin
2025-09-10 1:06 ` René Herman
2025-09-10 1:46 ` Matthew Wilcox
2025-09-10 9:49 ` Linus Walleij [this message]
2025-09-10 12:17 ` Arnd Bergmann
2025-09-10 12:32 ` David Hildenbrand
2025-09-10 13:10 ` Linus Walleij
2025-09-10 14:04 ` Matthew Wilcox
2025-09-10 15:13 ` Arnd Bergmann
2025-09-10 14:04 ` Richard Weinberger
2025-09-10 16:34 ` Dave Hansen
2025-09-10 20:33 ` Richard Weinberger
2025-09-10 21:56 ` René Herman
2025-09-12 10:30 ` Arnd Bergmann
2025-09-12 12:46 ` Linus Walleij
2025-10-06 20:15 ` Richard Weinberger
2025-09-10 17:11 ` Christophe Leroy
2025-09-10 19:37 ` Richard Weinberger
2025-09-11 5:38 ` Andreas Larsson
2025-09-11 7:53 ` Arnd Bergmann
2025-09-12 9:32 ` Andreas Larsson
2025-09-12 9:36 ` H. Peter Anvin
2025-09-12 10:17 ` Arnd Bergmann
2025-09-12 9:58 ` H. Peter Anvin
2025-09-12 13:16 ` Matthew Wilcox
2025-09-12 16:49 ` Nicolas Ferre
2025-09-12 21:09 ` Arnd Bergmann
2025-09-17 12:59 ` Jason Gunthorpe
2025-09-18 13:12 ` Arnd Bergmann
2025-09-18 13:34 ` Andrew Lunn
2025-09-18 16:18 ` Arnd Bergmann
2025-09-18 16:32 ` Andrew Lunn
2025-09-19 7:17 ` Geert Uytterhoeven
2025-09-19 14:22 ` Arnd Bergmann
2025-09-19 14:34 ` Jason Gunthorpe
2025-09-22 6:58 ` Arnd Bergmann
2025-09-22 17:05 ` Nicolas Schichan
2025-09-22 21:22 ` Arnd Bergmann
2025-09-19 14:41 ` Nicolas Ferre
2025-09-19 14:22 ` Nicolas Ferre
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