From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Daniel Palmer <daniel@thingy.jp>
Cc: Hajime Tazaki <thehajime@gmail.com>,
linux-mm@kvack.org, geert@linux-m68k.org,
Arnd Bergmann <arnd@arndb.de>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>,
Jan Kara <jack@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
"Liam R. Howlett" <liam@infradead.org>,
Lorenzo Stoakes <ljs@kernel.org>,
Vlastimil Babka <vbabka@kernel.org>, Jann Horn <jannh@google.com>,
Pedro Falcato <pfalcato@suse.de>,
linux-fsdevel@vger.kernel.org
Subject: Re: [RFC PATCH 3/6] mm: nommu: fix an issue on map request to /dev/zero
Date: Thu, 13 Aug 2026 23:02:18 +0900 [thread overview]
Message-ID: <2026081308-amigo-paragraph-3afd@gregkh> (raw)
In-Reply-To: <CAFr9PX=zC8GnxwrR=wTwA4xQq89cHYpxZWooS+-=Q-WuNbjanQ@mail.gmail.com>
On Thu, Aug 13, 2026 at 09:43:37PM +0900, Daniel Palmer wrote:
> Hi Greg,
>
> On Thu, 13 Aug 2026 at 21:26, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
>
> > Given the age of this issue, I don't think anyone uses no-mmu systems
> > anymore :(
>
> There are a few of us using it for hobby stuff[0][1] and there are
> apparently people using it for actual commercial stuff.
> There was a session about this at LPC 2025...
This patch is fixing a very obvious issue that showed up in the 5.10
kernel, which was released in December 2020.
So I think the fact that no one has reported it before now means that no
one is actually using it :)
thanks,
greg k-h
next prev parent reply other threads:[~2026-08-13 14:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-13 6:33 [RFC PATCH 0/6] fix nommu mmap and add nommu kselftests Hajime Tazaki
2026-08-13 6:33 ` [RFC PATCH 1/6] mm: nommu: fix do_mremap() to correctly update internal states Hajime Tazaki
2026-08-13 6:33 ` [RFC PATCH 2/6] mm: nommu: use vma_is_anonymous() to check if vmas are anonymous Hajime Tazaki
2026-08-13 6:33 ` [RFC PATCH 3/6] mm: nommu: fix an issue on map request to /dev/zero Hajime Tazaki
2026-08-13 12:19 ` Greg Kroah-Hartman
2026-08-13 12:43 ` Daniel Palmer
2026-08-13 13:29 ` Lorenzo Stoakes (ARM)
2026-08-13 13:51 ` Daniel Palmer
2026-08-13 13:58 ` Lorenzo Stoakes (ARM)
2026-08-13 14:06 ` Greg Kroah-Hartman
2026-08-13 14:02 ` Greg Kroah-Hartman [this message]
2026-08-13 14:10 ` Lorenzo Stoakes (ARM)
2026-08-13 13:22 ` Matthew Wilcox
2026-08-13 13:32 ` Lorenzo Stoakes (ARM)
2026-08-13 13:43 ` Lorenzo Stoakes (ARM)
2026-08-13 14:04 ` Greg Kroah-Hartman
2026-08-13 6:33 ` [RFC PATCH 4/6] selftests: fix build errors on alpine linux Hajime Tazaki
2026-08-13 6:34 ` [RFC PATCH 5/6] selftests: run tests on nommu architecture Hajime Tazaki
2026-08-13 6:34 ` [RFC PATCH 6/6] selftests/mm: add nommu mmap and mremap behavior tests Hajime Tazaki
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