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Date: Thu, 20 Oct 2022 11:29:28 -0600 From: Yu Zhao <yuzhao@...gle.com> To: Peter Zijlstra <peterz@...radead.org> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org>, Andi Kleen <ak@...ux.intel.com>, Aneesh Kumar <aneesh.kumar@...ux.ibm.com>, Catalin Marinas <catalin.marinas@....com>, Dave Hansen <dave.hansen@...ux.intel.com>, Hillf Danton <hdanton@...a.com>, Jens Axboe <axboe@...nel.dk>, Johannes Weiner <hannes@...xchg.org>, Jonathan Corbet <corbet@....net>, Matthew Wilcox <willy@...radead.org>, Mel Gorman <mgorman@...e.de>, Michael Larabel <Michael@...haellarabel.com>, Michal Hocko <mhocko@...nel.org>, Mike Rapoport <rppt@...nel.org>, Tejun Heo <tj@...nel.org>, Vlastimil Babka <vbabka@...e.cz>, Will Deacon <will@...nel.org>, linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, x86@...nel.org, page-reclaim@...gle.com, Brian Geffon <bgeffon@...gle.com>, Jan Alexander Steffens <heftig@...hlinux.org>, Oleksandr Natalenko <oleksandr@...alenko.name>, Steven Barrett <steven@...uorix.net>, Suleiman Souhlal <suleiman@...gle.com>, Daniel Byrne <djbyrne@....edu>, Donald Carr <d@...os-reins.com>, Holger Hoffstätte <holger@...lied-asynchrony.com>, Konstantin Kharlamov <Hi-Angel@...dex.ru>, Shuang Zhai <szhai2@...rochester.edu>, Sofia Trinh <sofia.trinh@....works>, Vaibhav Jain <vaibhav@...ux.ibm.com> Subject: Re: [PATCH v14 08/14] mm: multi-gen LRU: support page table walks On Thu, Oct 20, 2022 at 8:14 AM Peter Zijlstra <peterz@...radead.org> wrote: > > On Wed, Oct 19, 2022 at 10:40:40AM -0700, Linus Torvalds wrote: > > > Because as you say, the function is already called "read_atomic", and > > it should damn well *act* that way then. > > So I've been sitting on these here patches (and never having time to > repost them), which is how I noticed in the first place: > > https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/log/?h=x86/mm.pae This looks good to me. It'll help get rid of all those open-coded barrier()s and fix a couple of missing barrier()s.
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