linux-kernel - Re: [PATCH] mm: document highmem_is

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Message-ID: <20170626152728.GA13340@cmpxchg.org>
Date:   Mon, 26 Jun 2017 11:27:28 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
        LKML <linux-kernel@...r.kernel.org>,
        Alkis Georgopoulos <alkisg@...il.com>,
        Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH] mm: document highmem_is_dirtyable sysctl

On Mon, Jun 26, 2017 at 11:32:00AM +0200, Michal Hocko wrote:
> From: Michal Hocko <mhocko@...e.com>
> 
> It seems that there are still people using 32b kernels which a lot of
> memory and the IO tend to suck a lot for them by default. Mostly because
> writers are throttled too when the lowmem is used. We have
> highmem_is_dirtyable to work around that issue but it seems we never
> bothered to document it. Let's do it now, finally.
> 
> Cc: Alkis Georgopoulos <alkisg@...il.com>
> Signed-off-by: Michal Hocko <mhocko@...e.com>

Acked-by: Johannes Weiner <hannes@...xchg.org>