linux-kernel - Re: [patch 1/7] cpusets: add dirty map to struct address

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Message-Id: <1225215985.15763.36.camel@lappy.programming.kicks-ass.net>
Date:	Tue, 28 Oct 2008 18:46:25 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>, Paul Menage <menage@...gle.com>,
	Derek Fults <dfults@....com>, linux-kernel@...r.kernel.org
Subject: Re: [patch 1/7] cpusets: add dirty map to struct address_space

On Tue, 2008-10-28 at 09:08 -0700, David Rientjes wrote:
> @@ -487,6 +488,12 @@ void generic_sync_sb_inodes(struct super_block *sb,
>                         continue;               /* blockdev has wrong queue */
>                 }
>  
> +               if (!cpuset_intersects_dirty_nodes(mapping, wbc->nodes)) {
> +                       /* No node pages under writeback */
> +                       requeue_io(inode);
> +                       continue;
> +               }

So, aside from all the dirty limit and passing node masks around, this
is the magic bit?

I totally missed it first time around, a short mention in the changelog
might not be undeserved.

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