From: Jason Gunthorpe <jgg@nvidia.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: "Geert Uytterhoeven" <geert@linux-m68k.org>,
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>,
"Linus Walleij" <linus.walleij@linaro.org>,
"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>,
"Matthew Wilcox" <willy@infradead.org>,
"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: Fri, 19 Sep 2025 11:34:36 -0300 [thread overview]
Message-ID: <20250919143436.GC2132010@nvidia.com> (raw)
In-Reply-To: <547dcb81-434d-4910-aa7c-1d69019fcb3d@app.fastmail.com>
On Fri, Sep 19, 2025 at 04:22:20PM +0200, Arnd Bergmann wrote:
> SAM9X7 in 2023 added DDR3 mode with up to 256MB according to
> the datasheet, no idea why they chose not to support more,
Quite possible the internal SOC wiring only has 28 address lines. :)
I am right it sounds like we can drop vivt cache support with highmem?
vivt is alot easier to understand if kmap isn't running around
creating virtual addresses aliases!
Jason
next prev parent reply other threads:[~2025-09-19 14:35 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-09 21:23 [TECH TOPIC] Reaching consensus on CONFIG_HIGHMEM phaseout 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
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 [this message]
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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