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Message-ID: <CAOUHufaEMt6oiaw7pj+eGLTK4y7CaiYO0BSf13vrE27JqQiAzw@mail.gmail.com>
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>,
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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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