linux-kernel - Re: [PATCH v12 00/14] Multi-Gen LRU Framework

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Date:   Wed, 22 Jun 2022 00:21:47 -0600
From:   Yu Zhao <yuzhao@...gle.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     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>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        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>,
        Peter Zijlstra <peterz@...radead.org>,
        Tejun Heo <tj@...nel.org>, Vlastimil Babka <vbabka@...e.cz>,
        Will Deacon <will@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Kernel Page Reclaim v2 <page-reclaim@...gle.com>
Subject: Re: [PATCH v12 00/14] Multi-Gen LRU Framework

On Tue, Jun 14, 2022 at 1:17 AM Yu Zhao <yuzhao@...gle.com> wrote:
>
> What's new
> ==========
> 1. Fixed a bug (using pmd_addr_end() when __PAGETABLE_PMD_FOLDED)
>    reported by:
>    Thomas Graichen <thomas.graichen@...glemail.com>
>    https://forum.armbian.com/topic/20018-mglru-patches-to-bring-down-kswapd-cpu-usage/
> 2. Retested on v5.19-rc1 and rebased to v5.19-rc2.
> 3. Nits.
>
> TLDR
> ====
> The current page reclaim is too expensive in terms of CPU usage and it
> often makes poor choices about what to evict. This patchset offers an
> alternative solution that is performant, versatile and
> straightforward.

I don't see any action items left for me. Are we good for the next merge window?