linux-kernel - [PATCH 1/3] mm/readahead: Change the check for PageReadahead into an else-if

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Message-Id: <5a2186efeb299af150b1bef10f1c3a428722b3de.1310239575.git.rprabhu@wnohang.net>
Date:	Sun, 10 Jul 2011 01:11:18 +0530
From:	Raghavendra D Prabhu <raghu.prabhu13@...il.com>
To:	fengguang.wu@...el.com
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org,
	Raghavendra D Prabhu <rprabhu@...hang.net>
Subject: [PATCH 1/3] mm/readahead: Change the check for PageReadahead into an else-if

>From 51daa88ebd8e0d437289f589af29d4b39379ea76, page_sync_readahead coalesces
async readahead into its readahead window, so another checking for that again is
not required.

Signed-off-by: Raghavendra D Prabhu <rprabhu@...hang.net>
---
 mm/filemap.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index a8251a8..074c23d 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1115,8 +1115,7 @@ find_page:
 			page = find_get_page(mapping, index);
 			if (unlikely(page == NULL))
 				goto no_cached_page;
-		}
-		if (PageReadahead(page)) {
+		} else if (PageReadahead(page)) {
 			page_cache_async_readahead(mapping,
 					ra, filp, page,
 					index, last_index - index);
-- 
1.7.6

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