linux-kernel - Re: [PATCH 05/13] writeback: account per-bdi accumulated written pages

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Message-ID: <1290594376.2072.442.camel@laptop>
Date:	Wed, 24 Nov 2010 11:26:16 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, Jan Kara <jack@...e.cz>,
	Christoph Hellwig <hch@....de>,
	Dave Chinner <david@...morbit.com>,
	Theodore Ts'o <tytso@....edu>,
	Chris Mason <chris.mason@...cle.com>,
	Mel Gorman <mel@....ul.ie>, Rik van Riel <riel@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm <linux-mm@...ck.org>, linux-fsdevel@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/13] writeback: account per-bdi accumulated written
 pages

On Wed, 2010-11-17 at 12:27 +0800, Wu Fengguang wrote:
> @@ -1292,6 +1292,7 @@ int test_clear_page_writeback(struct pag
>                                                 PAGECACHE_TAG_WRITEBACK);
>                         if (bdi_cap_account_writeback(bdi)) {
>                                 __dec_bdi_stat(bdi, BDI_WRITEBACK);
> +                               __inc_bdi_stat(bdi, BDI_WRITTEN);
>                                 __bdi_writeout_inc(bdi);
>                         }
>                 } 

Shouldn't that live in __bdi_writeout_inc()? It looks like this forgets
about fuse (fuse_writepage_finish() -> bdi_writeout_inc() ->
__bdi_writeout_inc()).
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