linux-kernel - Re: [PATCH v5 3/4] mm: convert totalram_pages and totalhigh

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Message-ID: <20181114192310.mleekpniomfrbibf@soleen.tm1wkky2jk1uhgkn0ivaxijq1c.bx.internal.cloudapp.net>
Date:   Wed, 14 Nov 2018 19:23:10 +0000
From:   Pavel Tatashin <pasha.tatashin@...een.com>
To:     Arun KS <arunks@...eaurora.org>
Cc:     keescook@...omium.org, khlebnikov@...dex-team.ru,
        minchan@...nel.org, getarunks@...il.com,
        gregkh@...uxfoundation.org, akpm@...ux-foundation.org,
        mhocko@...nel.org, vbabka@...e.cz, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, vatsa@...eaurora.org, willy@...radead.org
Subject: Re: [PATCH v5 3/4] mm: convert totalram_pages and totalhigh_pages
 variables to atomic

On 18-11-13 12:03:09, Arun KS wrote:
> totalram_pages and totalhigh_pages are made static inline function.
> 
> Main motivation was that managed_page_count_lock handling was
> complicating things. It was discussed in lenght here,
> https://lore.kernel.org/patchwork/patch/995739/#1181785
> So it seemes better to remove the lock and convert variables
> to atomic, with preventing poteintial store-to-read tearing as
> a bonus.
> 
> Suggested-by: Michal Hocko <mhocko@...e.com>
> Suggested-by: Vlastimil Babka <vbabka@...e.cz>
> Signed-off-by: Arun KS <arunks@...eaurora.org>
> Reviewed-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
> Acked-by: Michal Hocko <mhocko@...e.com>
> Acked-by: Vlastimil Babka <vbabka@...e.cz>

Reviewed-by: Pavel Tatashin <pasha.tatashin@...een.com>