linux-kernel - Re: [PATCH V12 0/2] arm64/mm: Enable memory hot remove

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Message-ID: <20200121151822.GA13306@willie-the-truck>
Date:   Tue, 21 Jan 2020 15:18:23 +0000
From:   Will Deacon <will@...nel.org>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, akpm@...ux-foundation.org,
        catalin.marinas@....com, mark.rutland@....com, david@...hat.com,
        cai@....pw, logang@...tatee.com, cpandya@...eaurora.org,
        arunks@...eaurora.org, dan.j.williams@...el.com,
        mgorman@...hsingularity.net, osalvador@...e.de,
        ard.biesheuvel@....com, steve.capper@....com, broonie@...nel.org,
        valentin.schneider@....com, Robin.Murphy@....com,
        steven.price@....com, suzuki.poulose@....com, ira.weiny@...el.com
Subject: Re: [PATCH V12 0/2] arm64/mm: Enable memory hot remove

On Thu, Jan 16, 2020 at 12:15:33PM +0530, Anshuman Khandual wrote:
> This series enables memory hot remove functionality on arm64 platform. This
> is based on Linux 5.5-rc6 and particularly deals with a problem caused when
> boot memory is attempted to be removed.

Unfortunately, this results in a conflict with mainline since the arm64
-next branches are based on -rc3 and there was a fix merged after that
(feee6b298916 ("mm/memory_hotplug: shrink zones when offlining memory"))
which changes the type of __remove_pages().

So I think I'll leave this for 5.7.

Will