linux-kernel - Re: [PATCH] mm: account reaped page cache on inode cache pruning

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Date:	Fri, 18 Nov 2011 11:32:12 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Dave Chinner <david@...morbit.com>
Subject: Re: [PATCH] mm: account reaped page cache on inode cache pruning

Andrew Morton wrote:
> On Fri, 18 Nov 2011 10:42:50 +0400 Konstantin Khlebnikov<khlebnikov@...nvz.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.

Yes, but currently task_struct has permanent pointer to reclaim_state =)

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

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