linux-kernel - [PATCH] io accounting minor fix

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Message-ID: <20061204085436.GA6602@mail.ustc.edu.cn>
Date:	Mon, 4 Dec 2006 16:54:36 +0800
From:	Fengguang Wu <fengguang.wu@...il.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] io accounting minor fix

Account only successful nfs/fuse reads.

Signed-off-by: Fengguang Wu <wfg@...l.ustc.edu.cn>
---

--- linux-2.6.19-rc6-mm2.orig/mm/readahead.c
+++ linux-2.6.19-rc6-mm2/mm/readahead.c
@@ -242,7 +242,6 @@ int read_cache_pages(struct address_spac
 			page_cache_release(page);
 			continue;
 		}
-		task_io_account_read(PAGE_CACHE_SIZE);
 		ret = filler(data, page);
 		if (!pagevec_add(&lru_pvec, page)) {
 			cond_resched();
@@ -252,6 +251,7 @@ 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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