linux-kernel - Re: [PATCH v6 0/9] Multigenerational LRU Framework

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Date:   Wed, 5 Jan 2022 14:12:33 -0700
From:   Yu Zhao <yuzhao@...gle.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Hillf Danton <hdanton@...a.com>, Jens Axboe <axboe@...nel.dk>,
        Jesse Barnes <jsbarnes@...gle.com>,
        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>,
        Rik van Riel <riel@...riel.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Will Deacon <will@...nel.org>,
        Ying Huang <ying.huang@...el.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>, page-reclaim@...gle.com,
        the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [PATCH v6 0/9] Multigenerational LRU Framework

On Tue, Jan 04, 2022 at 01:43:13PM -0800, Linus Torvalds wrote:
> On Tue, Jan 4, 2022 at 12:30 PM Yu Zhao <yuzhao@...gle.com> wrote:
> >
> > My goal is to get it merged asap so that users can reap the benefits
> > and I can push the sequels. Please examine the data provided -- I
> > think the unprecedented coverage and the magnitude of the improvements
> > warrant a green light.
> 
> I'll leave this to Andrew. I had some stylistic nits, but all the
> actual complexity is in that aging and eviction, and while I looked at
> the patches, I certainly couldn't make much of a judgement on them.
> 
> The proof is in the numbers, and they look fine, but who knows what
> happens when others test it. I don't see anything that looks worrisome
> per se, I just see the silly small things that made me go "Eww".

I appreciate your time, I'll address all your comments togather with
others' in the next spin, after I hear from Andrew. (I'm assuming he
will have comments too.)