From: Dave Hansen <dave.hansen@intel.com>
To: Yeoreum Yun <yeoreum.yun@arm.com>,
Russell King <linux@armlinux.org.uk>,
Huacai Chen <chenhuacai@kernel.org>,
WANG Xuerui <kernel@xen0n.name>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Andrew Morton <akpm@linux-foundation.org>,
Kairui Song <kasong@tencent.com>, Qi Zheng <qi.zheng@linux.dev>,
Shakeel Butt <shakeel.butt@linux.dev>,
Barry Song <baohua@kernel.org>,
Axel Rasmussen <axelrasmussen@google.com>,
Yuanchu Xie <yuanchu@google.com>, Wei Xu <weixugc@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
David Hildenbrand <david@kernel.org>,
Michal Hocko <mhocko@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>,
Tianrui Zhao <zhaotianrui@loongson.cn>,
Bibo Mao <maobibo@loongson.cn>, Anup Patel <anup@brainfault.org>,
Atish Patra <atish.patra@linux.dev>,
Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>,
Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Liam R. Howlett" <liam@infradead.org>,
Vlastimil Babka <vbabka@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Jonas Bonn <jonas@southpole.se>,
Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
Stafford Horne <shorne@gmail.com>
Cc: linux-kernel@vger.kernel.org, loongarch@lists.linux.dev,
linux-mips@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org, kvm@vger.kernel.org,
kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org,
linux-openrisc@vger.kernel.org
Subject: Re: [PATCH RFC v2 00/20] mm: optimize unnecessary loads due to ptep_get() and friends out
Date: Wed, 22 Jul 2026 09:40:03 -0700 [thread overview]
Message-ID: <0143b927-08c5-4e94-ae6e-2a0d7bfe950f@intel.com> (raw)
In-Reply-To: <20260722-dummy_ptxp3-v2-0-d9e4bad31e0a@arm.com>
One of my nits about v1 was that it didn't really frame the series
precisely. It talks about "optimization" instead of fundamentally
changing the way that the kernel deals with folded page table levels.
The optimization that this *wants* to talk about kinda falls out of that
refactoring. It's not really the core of the series, IMNHO.
This series effectively changes the rules about where and how folded
page table levels can be manipulated. In doing that, the door is opened
to optimizing out the unnecessary loads.
Oh, and I'm pulling linux-arm-kernel@lists.infradead.org off cc. If
anyone has the juju, please fix it so it stops spamming replies with
"Your message to linux-arm-kernel awaits moderator approval".
next prev parent reply other threads:[~2026-07-22 16:40 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-22 15:30 [PATCH RFC v2 00/20] mm: optimize unnecessary loads due to ptep_get() and friends out Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 01/20] ARM: mm: make nommu pgd_t a scalar Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 02/20] ARM: mm: make 2-level " Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 03/20] ARM: mm: remove custom pgdp_get() Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 04/20] LoongArch: mm: define pud_leaf() only when PUD exists Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 05/20] MIPS: " Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 06/20] mm/pgtable: define (pgd|p4d|pud)_leaf() for folded page tables Yeoreum Yun
2026-07-22 15:51 ` sashiko-bot
2026-07-22 15:30 ` [PATCH RFC v2 07/20] mm/pgtable: define (pgd|p4d|pud)_offset_lockless() " Yeoreum Yun
2026-07-22 15:58 ` sashiko-bot
2026-07-22 19:25 ` Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 08/20] mm: vmscan: remove stack copy address of pud pass in wallk_pud_range() Yeoreum Yun
2026-07-22 15:56 ` sashiko-bot
2026-07-22 19:31 ` Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 09/20] loongarch: kvm: remove stack copy address of pXd in pXd_offset() Yeoreum Yun
2026-07-22 15:53 ` sashiko-bot
2026-07-22 19:51 ` Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 10/20] riscv: " Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 11/20] riscv: mm: use proper set_pXd() for generic compile-time folded patable in vmalloc_fault() Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 12/20] x86: mm: define pudp_set_access_flags() when CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD is enabled only Yeoreum Yun
2026-07-22 16:02 ` Dave Hansen
2026-07-22 17:27 ` Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 13/20] x86: mm: carve out the generic compile-time folded pgtable case in effective_prot() Yeoreum Yun
2026-07-22 16:07 ` sashiko-bot
2026-07-22 16:23 ` Yeoreum Yun
2026-07-22 16:11 ` Dave Hansen
2026-07-22 16:28 ` Yeoreum Yun
2026-07-22 17:37 ` Yeoreum Yun
2026-07-22 20:20 ` Dave Hansen
2026-07-22 21:00 ` Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 14/20] x86: mm: skip pud setup when using generic compile-time folded pagetable Yeoreum Yun
2026-07-22 16:18 ` sashiko-bot
2026-07-22 19:08 ` Yeoreum Yun
2026-07-22 16:33 ` Dave Hansen
2026-07-22 17:18 ` Yeoreum Yun
2026-07-22 20:02 ` Dave Hansen
2026-07-22 20:18 ` Yeoreum Yun
2026-07-22 20:22 ` Dave Hansen
2026-07-22 20:28 ` H. Peter Anvin
2026-07-22 20:40 ` Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 15/20] mm/pgtable: optimize pmdp_get() and friends for folded pagetable levels Yeoreum Yun
2026-07-22 16:15 ` sashiko-bot
2026-07-22 19:44 ` Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 16/20] mm/pgtable: catch abuse of folded dummy pgd_t/p4d_t/pud_t Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 17/20] mm/pgtable: disallow calling (pgd|p4d|pud)_page, pgd_page_vaddr() and (p4d|pud)_pgtable with dummy Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 18/20] mm/pgtable: disallow calling folded set_pgd/set_p4d/set_pud " Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 19/20] openrisc/pgtable: drop __pmd_offset() Yeoreum Yun
2026-07-22 15:30 ` [PATCH RFC v2 20/20] arm64: pgtable: convert pte_present() from macro to static inline Yeoreum Yun
2026-07-22 16:40 ` Dave Hansen [this message]
2026-07-22 17:30 ` [PATCH RFC v2 00/20] mm: optimize unnecessary loads due to ptep_get() and friends out Yeoreum Yun
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