linux-kernel - Re: [PATCH v5 1/4] mm: reference totalram_pages and managed

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Message-ID: <20181114192030.2iz3vrlppob73uio@soleen.tm1wkky2jk1uhgkn0ivaxijq1c.bx.internal.cloudapp.net>
Date:   Wed, 14 Nov 2018 19:20:30 +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 1/4] mm: reference totalram_pages and managed_pages
 once per function

On 18-11-13 12:03:07, Arun KS wrote:
> This patch is in preparation to a later patch which converts totalram_pages
> and zone->managed_pages to atomic variables. Please note that re-reading
> the value might lead to a different value and as such it could lead to
> unexpected behavior. There are no known bugs as a result of the current code
> but it is better to prevent from them in principle.
> 
> 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>