From: Dave Hansen <dave.hansen@intel.com>
To: Charlie Jenkins <charlie@rivosinc.com>,
Arnd Bergmann <arnd@arndb.de>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Naveen N Rao <naveen@kernel.org>,
Muchun Song <muchun.song@linux.dev>,
Andrew Morton <akpm@linux-foundation.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Huacai Chen <chenhuacai@kernel.org>,
WANG Xuerui <kernel@xen0n.name>,
Russell King <linux@armlinux.org.uk>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
Helge Deller <deller@gmx.de>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
"David S. Miller" <davem@davemloft.net>,
Andreas Larsson <andreas@gaisler.com>,
Shuah Khan <shuah@kernel.org>,
Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
Palmer Dabbelt <palmer@rivosinc.com>,
linux-riscv@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org,
loongarch@lists.linux.dev, linux-mips@vger.kernel.org,
linux-parisc@vger.kernel.org, linux-s390@vger.kernel.org,
linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
linux-kselftest@vger.kernel.org
Subject: Re: [PATCH 00/16] mm: Introduce MAP_BELOW_HINT
Date: Wed, 28 Aug 2024 11:29:56 -0700 [thread overview]
Message-ID: <fd1b8016-e73d-4535-9c67-579ab994351f@intel.com> (raw)
In-Reply-To: <20240827-patches-below_hint_mmap-v1-0-46ff2eb9022d@rivosinc.com>
On 8/27/24 22:49, Charlie Jenkins wrote:
> Some applications rely on placing data in free bits addresses allocated
> by mmap. Various architectures (eg. x86, arm64, powerpc) restrict the
> address returned by mmap to be less than the maximum address space,
> unless the hint address is greater than this value.
Which applications are these, btw?
Is this the same crowd as the folks who are using the address tagging
features like X86_FEATURE_LAM?
Even if they are different, I also wonder if a per-mmap() thing
MAP_BELOW_HINT is really what we want. Or should the applications
you're trying to service here use a similar mechanism to how LAM affects
the *whole* address space as opposed to an individual mmap().
next prev parent reply other threads:[~2024-08-28 18:30 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-28 5:49 Charlie Jenkins
2024-08-28 5:49 ` [PATCH 01/16] mm: Add MAP_BELOW_HINT Charlie Jenkins
2024-08-28 5:49 ` [PATCH 02/16] riscv: mm: Do not restrict mmap address based on hint Charlie Jenkins
2024-08-28 5:49 ` [PATCH 03/16] mm: Add flag and len param to arch_get_mmap_base() Charlie Jenkins
2024-08-28 5:49 ` [PATCH 04/16] mm: Add generic MAP_BELOW_HINT Charlie Jenkins
2024-08-28 5:49 ` [PATCH 05/16] riscv: mm: Support MAP_BELOW_HINT Charlie Jenkins
2024-08-28 5:49 ` [PATCH 06/16] arm64: " Charlie Jenkins
2024-08-28 5:49 ` [PATCH 07/16] powerpc: " Charlie Jenkins
2024-08-28 6:34 ` Christophe Leroy
2024-08-28 17:29 ` Charlie Jenkins
2024-08-31 16:30 ` David Laight
2024-08-28 5:49 ` [PATCH 08/16] x86: " Charlie Jenkins
2024-08-28 5:49 ` [PATCH 09/16] loongarch: " Charlie Jenkins
2024-08-28 5:49 ` [PATCH 10/16] arm: " Charlie Jenkins
2024-08-28 5:49 ` [PATCH 11/16] mips: " Charlie Jenkins
2024-08-28 5:49 ` [PATCH 12/16] parisc: " Charlie Jenkins
2024-08-28 5:49 ` [PATCH 13/16] s390: " Charlie Jenkins
2024-08-28 5:49 ` [PATCH 14/16] sh: " Charlie Jenkins
2024-08-28 5:49 ` [PATCH 15/16] sparc: " Charlie Jenkins
2024-08-28 5:49 ` [PATCH 16/16] selftests/mm: Create MAP_BELOW_HINT test Charlie Jenkins
2024-08-28 17:48 ` Lorenzo Stoakes
2024-08-28 18:13 ` Charlie Jenkins
2024-08-28 18:19 ` [PATCH 00/16] mm: Introduce MAP_BELOW_HINT Lorenzo Stoakes
2024-08-29 7:14 ` Charlie Jenkins
2024-08-28 18:29 ` Dave Hansen [this message]
2024-08-28 20:15 ` Charlie Jenkins
2024-08-29 16:54 ` Dave Hansen
2024-08-29 19:36 ` Liam R. Howlett
2024-08-30 1:10 ` Charlie Jenkins
2024-08-30 1:00 ` Charlie Jenkins
2024-08-28 18:31 ` Liam R. Howlett
2024-08-28 20:59 ` Charlie Jenkins
2024-08-28 21:39 ` Charlie Jenkins
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=fd1b8016-e73d-4535-9c67-579ab994351f@intel.com \
--to=dave.hansen@intel.com \
--cc=James.Bottomley@HansenPartnership.com \
--cc=Liam.Howlett@oracle.com \
--cc=agordeev@linux.ibm.com \
--cc=akpm@linux-foundation.org \
--cc=alexghiti@rivosinc.com \
--cc=andreas@gaisler.com \
--cc=aou@eecs.berkeley.edu \
--cc=arnd@arndb.de \
--cc=borntraeger@linux.ibm.com \
--cc=bp@alien8.de \
--cc=catalin.marinas@arm.com \
--cc=charlie@rivosinc.com \
--cc=chenhuacai@kernel.org \
--cc=christophe.leroy@csgroup.eu \
--cc=dalias@libc.org \
--cc=dave.hansen@linux.intel.com \
--cc=davem@davemloft.net \
--cc=deller@gmx.de \
--cc=gerald.schaefer@linux.ibm.com \
--cc=glaubitz@physik.fu-berlin.de \
--cc=gor@linux.ibm.com \
--cc=hca@linux.ibm.com \
--cc=hpa@zytor.com \
--cc=kernel@xen0n.name \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-parisc@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux-sh@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=loongarch@lists.linux.dev \
--cc=lorenzo.stoakes@oracle.com \
--cc=mingo@redhat.com \
--cc=mpe@ellerman.id.au \
--cc=muchun.song@linux.dev \
--cc=naveen@kernel.org \
--cc=npiggin@gmail.com \
--cc=palmer@dabbelt.com \
--cc=palmer@rivosinc.com \
--cc=paul.walmsley@sifive.com \
--cc=shuah@kernel.org \
--cc=sparclinux@vger.kernel.org \
--cc=svens@linux.ibm.com \
--cc=tglx@linutronix.de \
--cc=tsbogend@alpha.franken.de \
--cc=vbabka@suse.cz \
--cc=will@kernel.org \
--cc=x86@kernel.org \
--cc=ysato@users.sourceforge.jp \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox