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Date: Thu, 17 Nov 2011 22:52:02 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Dave Chinner <david@fromorbit.com>
Subject: Re: [PATCH] mm: account reaped page cache on inode cache pruning
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On Fri, 18 Nov 2011 10:42:50 +0400 Konstantin Khlebnikov <khlebnikov@openvz.org> wrote:

> Do we really need separate on-stack reclaim_state structure with single field?
> Maybe replace it with single long (or even unsigned int) .reclaimed_pages field on task_struct
> and account reclaimed pages unconditionally.

I don't think it matters a lot - it's either a temporary pointer on the
stack or a permanent space consumption in the task_struct.

The way thing are at present we can easily add new fields if needed.  I
don't think we've ever done that though.