From: "Christoph Lameter (Ampere)" <cl@gentwo.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Vlastimil Babka <vbabka@suse.cz>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Hyeonggon Yoo <42.hyeyoo@gmail.com>,
Jens Axboe <axboe@kernel.dk>,
Pavel Begunkov <asml.silence@gmail.com>,
Mike Rapoport <rppt@kernel.org>,
Christian Brauner <brauner@kernel.org>,
Guenter Roeck <linux@roeck-us.net>,
Kees Cook <keescook@chromium.org>, Jann Horn <jannh@google.com>,
linux-mm@kvack.org, io-uring@vger.kernel.org,
linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] slab: Fix too strict alignment check in create_cache()
Date: Thu, 21 Nov 2024 09:23:28 -0800 (PST) [thread overview]
Message-ID: <693a6243-b2bd-7f2b-2b69-c7e2308d0f58@gentwo.org> (raw)
In-Reply-To: <CAMuHMdWQisrjqaPPd0xLgtSAxRwnxCPdsqnWSncMiPYLnre2MA@mail.gmail.com>
On Thu, 21 Nov 2024, Geert Uytterhoeven wrote:
> Linux has supported m68k since last century.
Yeah I fondly remember the 80s where 68K systems were always out of reach
for me to have. The dream system that I never could get my hands on. The
creme de la creme du jour. I just had to be content with the 6800 and
6502 processors. Then IBM started the sick road down the 8088, 8086
that led from crap to more crap. Sigh.
> Any new such assumptions are fixed quickly (at least in the kernel).
> If you need a specific alignment, make sure to use __aligned and/or
> appropriate padding in structures.
> And yes, the compiler knows, and provides __alignof__.
>
> > How do you deal with torn reads/writes in such a scenario? Is this UP
> > only?
>
> Linux does not support (rate) SMP m68k machines.
Ah. Ok that explains it.
Do we really need to maintain support for a platform that has been
obsolete for decade and does not even support SMP?
next prev parent reply other threads:[~2024-11-21 17:32 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-20 12:46 Geert Uytterhoeven
2024-11-20 12:49 ` Geert Uytterhoeven
2024-11-20 15:00 ` Guenter Roeck
2024-11-20 15:01 ` Jens Axboe
2024-11-20 15:03 ` Vlastimil Babka
2024-11-20 15:14 ` Guenter Roeck
2024-11-20 15:44 ` Vlastimil Babka
2024-11-20 15:50 ` Geert Uytterhoeven
2024-11-20 17:50 ` Christoph Lameter (Ampere)
2024-11-21 3:51 ` Matthew Wilcox
2024-11-21 8:15 ` Geert Uytterhoeven
2024-11-21 17:23 ` Christoph Lameter (Ampere) [this message]
2024-11-21 18:30 ` Guenter Roeck
2024-11-21 18:35 ` Jens Axboe
2024-11-21 18:50 ` Geert Uytterhoeven
2024-11-21 19:08 ` Guenter Roeck
2024-11-21 19:22 ` Guenter Roeck
2024-11-22 9:45 ` Lorenzo Stoakes
2024-11-22 12:55 ` Lorenzo Stoakes
2024-11-22 18:54 ` Christoph Lameter (Ampere)
2024-11-22 0:23 ` Greg Ungerer
2024-11-22 8:12 ` Geert Uytterhoeven
2024-11-22 8:25 ` Max Filippov
2024-11-21 10:19 ` Christian Brauner
2024-11-21 22:02 ` John Paul Adrian Glaubitz
2024-11-22 2:12 ` Finn Thain
2024-11-22 7:55 ` Geert Uytterhoeven
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