linux-kernel - Re: [RFC PATCH 2/3] mm: Drop use of test_and_set

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Message-ID: <6c072332-ff16-757d-99dd-b8fbae131a0c@linux.alibaba.com>
Date:   Fri, 14 Aug 2020 15:19:09 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     Alexander Duyck <alexander.duyck@...il.com>
Cc:     yang.shi@...ux.alibaba.com, lkp@...el.com, rong.a.chen@...el.com,
        khlebnikov@...dex-team.ru, kirill@...temov.name, hughd@...gle.com,
        linux-kernel@...r.kernel.org, daniel.m.jordan@...cle.com,
        linux-mm@...ck.org, shakeelb@...gle.com, willy@...radead.org,
        hannes@...xchg.org, tj@...nel.org, cgroups@...r.kernel.org,
        akpm@...ux-foundation.org, richard.weiyang@...il.com,
        mgorman@...hsingularity.net, iamjoonsoo.kim@....com
Subject: Re: [RFC PATCH 2/3] mm: Drop use of test_and_set_skip in favor of
 just setting skip



在 2020/8/13 下午12:02, Alexander Duyck 写道:
> 
> Since we have dropped the late abort case we can drop the code that was
> clearing the LRU flag and calling page_put since the abort case will now
> not be holding a reference to a page.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@...ux.intel.com>

seems the case-lru-file-mmap-read case drop about 3% on this patch in a rough testing.
on my 80 core machine.

Thanks
Alex