From: Raghavendra D Prabhu <raghu.prabhu13@gmail.com>
To: fengguang.wu@intel.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org,
Raghavendra D Prabhu <rprabhu@wnohang.net>
Subject: [PATCH 1/3] mm/readahead: Change the check for PageReadahead into an else-if
Date: Sun, 10 Jul 2011 01:11:18 +0530 [thread overview]
Message-ID: <5a2186efeb299af150b1bef10f1c3a428722b3de.1310239575.git.rprabhu@wnohang.net> (raw)
In-Reply-To: <cover.1310239575.git.rprabhu@wnohang.net>
>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@wnohang.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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next prev parent reply other threads:[~2011-07-09 19:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-09 19:41 [PATCH 0/3] Readahead fixes Raghavendra D Prabhu
2011-07-09 19:41 ` Raghavendra D Prabhu [this message]
2011-07-09 20:47 ` [PATCH 1/3] mm/readahead: Change the check for PageReadahead into an else-if Wu Fengguang
2011-07-09 19:41 ` [PATCH 2/3] mm/readahead: Remove file_ra_state from arguments of count_history_pages Raghavendra D Prabhu
2011-07-09 20:47 ` Wu Fengguang
2011-07-09 19:41 ` [PATCH 3/3] mm/readahead: Move the check for ra_pages after VM_SequentialReadHint() Raghavendra D Prabhu
2011-07-09 20:53 ` Wu Fengguang
2011-07-10 12:59 ` [TOME] " Raghavendra D Prabhu
2011-07-10 15:59 ` Wu Fengguang
2011-07-11 23:02 ` Re. Revised [PATCH 3/3] mm/readahead: Remove the check for ra->ra_pages Raghavendra D Prabhu
2011-07-12 18:09 ` Wu Fengguang
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