linux-kernel - Re: [PATCH 09/12] mm: count unstable pages per BDI

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Message-Id: <E1HecBc-0006vS-00@dorka.pomaz.szeredi.hu>
Date:	Thu, 19 Apr 2007 21:20:56 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	a.p.zijlstra@...llo.nl
CC:	miklos@...redi.hu, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	neilb@...e.de, dgc@....com, tomoki.sekiyama.qu@...achi.com,
	nikita@...sterfs.com, trond.myklebust@....uio.no,
	yingchao.zhou@...il.com
Subject: Re: [PATCH 09/12] mm: count unstable pages per BDI

> Index: linux-2.6/fs/buffer.c
> ===================================================================
> --- linux-2.6.orig/fs/buffer.c	2007-04-19 19:59:26.000000000 +0200
> +++ linux-2.6/fs/buffer.c	2007-04-19 20:35:39.000000000 +0200
> @@ -733,7 +733,7 @@ int __set_page_dirty_buffers(struct page
>  	if (page->mapping) {	/* Race with truncate? */
>  		if (mapping_cap_account_dirty(mapping)) {
>  			__inc_zone_page_state(page, NR_FILE_DIRTY);
> -			__inc_bdi_stat(mapping->backing_dev_info, BDI_DIRTY);
> +			__inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIM);

This name suggests it's _under_ reclaim, which is not true.  You might
rather want to call it BDI_RECLAIMABLE, or something similar in
meaning.

Miklos
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