From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH 4/5] writeback: per task dirty rate limit
Date: Mon, 08 Aug 2011 16:26:52 +0200
Message-ID: <1312813612.10488.36.camel@twins>
References: <20110806084447.388624428@intel.com>
	 <20110806094527.002914580@intel.com> <1312811234.10488.34.camel@twins>
	 <20110808142318.GC22080@localhost>
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Cc: "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,  Andrew
 Morton <akpm@linux-foundation.org>, Jan Kara <jack@suse.cz>, Christoph
 Hellwig <hch@lst.de>, Dave Chinner <david@fromorbit.com>, Greg Thelen
 <gthelen@google.com>, Minchan Kim <minchan.kim@gmail.com>,  Vivek Goyal
 <vgoyal@redhat.com>, Andrea Righi <arighi@develer.com>, linux-mm
 <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>
To: Wu Fengguang <fengguang.wu@intel.com>
Return-path: <owner-linux-mm@kvack.org>
In-Reply-To: <20110808142318.GC22080@localhost>
Sender: owner-linux-mm@kvack.org
List-Id: linux-fsdevel.vger.kernel.org

On Mon, 2011-08-08 at 22:23 +0800, Wu Fengguang wrote:
> +       preempt_disable();
> +       p =3D &__get_cpu_var(dirty_leaks);

 p =3D &get_cpu_var(dirty_leaks);

> +       if (*p > 0 && current->nr_dirtied < ratelimit) {
> +               nr_pages_dirtied =3D min(*p, ratelimit - current->nr_dirt=
ied);
> +               *p -=3D nr_pages_dirtied;
> +               current->nr_dirtied +=3D nr_pages_dirtied;
> +       }
> +       preempt_enable();=20

put_cpu_var(dirty_leads);

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