From: Mark Rutland <mark.rutland@arm.com>
To: "Christoph Lameter (Ampere)" <cl@gentwo.org>
Cc: "David Hildenbrand (Arm)" <david@kernel.org>,
Yang Shi <yang@os.amperecomputing.com>,
"Lorenzo Stoakes (ARM)" <ljs@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ryan Roberts <ryan.roberts@arm.com>,
dennis@kernel.org, tj@kernel.org, urezki@gmail.com,
catalin.marinas@arm.com, will@kernel.org,
akpm@linux-foundation.org, hca@linux.ibm.com, gor@linux.ibm.com,
agordeev@linux.ibm.com, linux-mm@kvack.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Jason Gunthorpe <jgg@nvidia.com>
Subject: Re: [RFC v2 PATCH 0/16] Optimize this_cpu_*() ops for non-x86 (ARM64 for this series)
Date: Wed, 5 Aug 2026 15:48:14 +0100 [thread overview]
Message-ID: <anNNLv3pHQwfcZOu@J2N7QTR9R3> (raw)
In-Reply-To: <29edec61-8f11-b9b1-3df9-2a51815ee771@gentwo.org>
On Tue, Aug 04, 2026 at 03:35:22PM -0700, Christoph Lameter (Ampere) wrote:
>
> > That's really all we are asking for. If there is a measurable performance
> > difference, great. Share the results or point us at them if we missed them.
>
> Scanning over the patchset: It seems that you are using a special
> instruction that is unfamiliar to me. Which processors support that?
Which patch and which instruction are you referring to? There is no
information to go on here.
Asking on that specific patch would be helpful.
Mark.
next prev parent reply other threads:[~2026-08-05 14:48 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-15 18:04 [RFC v2 PATCH 0/16] Optimize this_cpu_*() ops for non-x86 (ARM64 for this series) Yang Shi
2026-07-15 18:04 ` [PATCH 01/16] drivers: arch_numa: move percpu set up code to arch Yang Shi
2026-07-15 18:04 ` [PATCH 02/16] arm64: kconfig: make percpu related configs not depend on NUMA Yang Shi
2026-07-15 18:04 ` [PATCH 03/16] mm: pgalloc: introduce {pud|pmd}_populate_sync() Yang Shi
2026-07-15 18:04 ` [PATCH 04/16] vmalloc: pass in pgd pointer for vmap{__vunmap}_range_noflush() Yang Shi
2026-07-29 9:32 ` Lorenzo Stoakes (ARM)
2026-08-03 19:12 ` Yang Shi
2026-08-04 13:47 ` Lorenzo Stoakes (ARM)
2026-07-15 18:04 ` [PATCH 05/16] arm64: mm: enable percpu kernel page table Yang Shi
2026-07-15 18:04 ` [PATCH 06/16] arm64: mm: defined {pud|pmd}_populate_sync() Yang Shi
2026-07-15 18:04 ` [PATCH 07/16] arm64: mm: sync percpu page table for memory hotplug/unplug Yang Shi
2026-07-15 18:04 ` [PATCH 08/16] arm64: kasan: sync up kasan shadow area page table Yang Shi
2026-07-15 18:04 ` [PATCH 09/16] arm64: mm: define percpu virtual space area Yang Shi
2026-07-15 18:04 ` [PATCH 10/16] mm: percpu: prepare to use dedicated percpu area Yang Shi
2026-07-15 18:04 ` [PATCH 11/16] arm64: mm: map local percpu first chunk Yang Shi
2026-07-15 18:04 ` [PATCH 12/16] mm: percpu: set up first chunk and reserve chunk Yang Shi
2026-07-15 18:04 ` [PATCH 13/16] arm64: mm: introduce __per_cpu_local_off Yang Shi
2026-07-15 18:04 ` [PATCH 14/16] mm: percpu: allocate and free local percpu vm area Yang Shi
2026-07-15 18:04 ` [PATCH 15/16] arm64: kconfig: select HAVE_LOCAL_PER_CPU_MAP Yang Shi
2026-07-15 18:04 ` [PATCH 16/16] arm64: percpu: use local percpu for this_cpu_*() APIs Yang Shi
2026-07-16 13:23 ` [RFC v2 PATCH 0/16] Optimize this_cpu_*() ops for non-x86 (ARM64 for this series) Ryan Roberts
2026-07-21 19:08 ` Mark Rutland
2026-07-21 23:20 ` Yang Shi
2026-07-22 9:36 ` Mark Rutland
2026-07-27 21:10 ` Yang Shi
2026-07-27 22:06 ` Christoph Lameter (Ampere)
2026-07-29 9:28 ` David Hildenbrand (Arm)
2026-08-04 14:15 ` Lorenzo Stoakes (ARM)
2026-08-04 14:21 ` Lorenzo Stoakes (ARM)
2026-08-04 14:40 ` Jason Gunthorpe
2026-08-04 18:06 ` Matthew Wilcox
2026-08-04 18:16 ` Jason Gunthorpe
2026-08-04 15:21 ` Linus Torvalds
2026-08-04 16:15 ` Christoph Lameter (Ampere)
2026-08-04 16:30 ` Linus Torvalds
2026-08-04 16:54 ` David Hildenbrand (Arm)
2026-08-04 17:01 ` Linus Torvalds
2026-08-04 17:32 ` Lorenzo Stoakes (ARM)
2026-08-04 21:40 ` Christoph Lameter (Ampere)
2026-08-04 21:48 ` David Hildenbrand (Arm)
2026-08-04 21:56 ` Christoph Lameter (Ampere)
2026-08-04 22:01 ` David Hildenbrand (Arm)
2026-08-05 8:16 ` Lorenzo Stoakes (ARM)
2026-08-04 17:23 ` Lorenzo Stoakes (ARM)
2026-08-04 17:28 ` Linus Torvalds
2026-08-04 21:51 ` Yang Shi
2026-08-04 22:05 ` David Hildenbrand (Arm)
2026-08-04 22:35 ` Christoph Lameter (Ampere)
2026-08-05 6:11 ` David Hildenbrand (Arm)
2026-08-05 14:48 ` Mark Rutland [this message]
2026-08-05 7:52 ` Lorenzo Stoakes (ARM)
2026-08-06 17:15 ` Will Deacon
2026-08-06 17:31 ` Lorenzo Stoakes (ARM)
2026-08-04 16:19 ` Christoph Lameter (Ampere)
2026-08-04 16:47 ` David Hildenbrand (Arm)
2026-08-04 21:25 ` Christoph Lameter (Ampere)
2026-08-04 21:47 ` David Hildenbrand (Arm)
2026-08-04 22:01 ` Christoph Lameter (Ampere)
2026-08-05 6:12 ` David Hildenbrand (Arm)
2026-08-05 8:45 ` Heiko Carstens
2026-08-05 11:10 ` David Laight
2026-08-05 14:53 ` Mark Rutland
2026-07-30 6:06 ` [RFC v2 PATCH 0/16] Optimize this_cpu_*() ops for non-x86 (ARM64 for this series)~ Mete Durlu
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