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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2026081308-amigo-paragraph-3afd@gregkh \
--to=gregkh@linuxfoundation.org \
--cc=akpm@linux-foundation.org \
--cc=arnd@arndb.de \
--cc=daniel@thingy.jp \
--cc=geert@linux-m68k.org \
--cc=jack@suse.cz \
--cc=jannh@google.com \
--cc=liam@infradead.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=ljs@kernel.org \
--cc=pfalcato@suse.de \
--cc=thehajime@gmail.com \
--cc=vbabka@kernel.org \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.