linux-kernel - [patch 06/13] io-accounting-read-accounting nfs fix

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Message-Id: <200612081152.kB8BqSKo019765@shell0.pdx.osdl.net>
Date:	Fri, 08 Dec 2006 03:52:28 -0800
From:	akpm@...l.org
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...l.org, balbir@...ibm.com, csturtiv@....com, daw@....com,
	guillaume.thouvenin@...l.net, jlan@....com, nagar@...son.ibm.com,
	tee@....com, wfg@...l.ustc.edu.cn
Subject: [patch 06/13] io-accounting-read-accounting nfs fix

From: Andrew Morton <akpm@...l.org>

nfs's ->readpages uses read_cache_pages().  Wire it up there.

[wfg@...l.ustc.edu.cn: account only successful nfs/fuse reads]
Cc: Jay Lan <jlan@....com>
Cc: Shailabh Nagar <nagar@...son.ibm.com>
Cc: Balbir Singh <balbir@...ibm.com>
Cc: Chris Sturtivant <csturtiv@....com>
Cc: Tony Ernst <tee@....com>
Cc: Guillaume Thouvenin <guillaume.thouvenin@...l.net>
Cc: David Wright <daw@....com>
Signed-off-by: Fengguang Wu <wfg@...l.ustc.edu.cn>
Signed-off-by: Andrew Morton <akpm@...l.org>
---

 mm/readahead.c |    2 ++
 1 file changed, 2 insertions(+)

diff -puN mm/readahead.c~io-accounting-read-accounting-nfs-fix mm/readahead.c
--- a/mm/readahead.c~io-accounting-read-accounting-nfs-fix
+++ a/mm/readahead.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/blkdev.h>
 #include <linux/backing-dev.h>
+#include <linux/task_io_accounting_ops.h>
 #include <linux/pagevec.h>
 
 void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
@@ -151,6 +152,7 @@ int read_cache_pages(struct address_spac
 			put_pages_list(pages);
 			break;
 		}
+		task_io_account_read(PAGE_CACHE_SIZE);
 	}
 	pagevec_lru_add(&lru_pvec);
 	return ret;
_
-
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