linux-kernel - Re: [PATCH v2 6/8] mm/lru: remove rcu_read

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Message-ID: <e286a02f-f377-34a9-a195-b827c54b969d@linux.alibaba.com>
Date:   Thu, 14 Nov 2019 14:02:20 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     Mel Gorman <mgorman@...hsingularity.net>
Cc:     Matthew Wilcox <willy@...radead.org>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        akpm@...ux-foundation.org, tj@...nel.org, hughd@...gle.com,
        khlebnikov@...dex-team.ru, daniel.m.jordan@...cle.com,
        yang.shi@...ux.alibaba.com, Johannes Weiner <hannes@...xchg.org>,
        Roman Gushchin <guro@...com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Chris Down <chris@...isdown.name>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v2 6/8] mm/lru: remove rcu_read_lock to fix performance
 regression



在 2019/11/13 下午7:40, Mel Gorman 写道:
>> Hi Matthew,
>>
>> Very sorry for your time! The main reasons I use a separate patch since a, Intel 0day asking me to credit their are founding, and I don't know how to give a clearly/elegant explanation for a non-exist regression in a fixed patch. b, this regression is kindly pretty tricky.  Maybe it's better saying thanks in version change log of cover-letter?
>>
> Add something like this to the patch
> 
> [lkp@...el.com: Fix RCU-related regression reported by LKP robot]
> Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>

It's a good idea! Thanks a lot, Mel!