linux-kernel - [PATCH 1/4] Cleanup read

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Message-ID: <8764e1muzf.fsf@duaron.myhome.or.jp>
Date:	Tue, 31 Oct 2006 05:03:48 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	akpm@...l.org, Trond.Myklebust@...app.com, miklos@...redi.hu,
	sfrench@...ibm.com, cluster-devel@...hat.com
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] Cleanup read_pages()

Current read_pages() assume ->readpages() frees the passed pages.

This patch free the pages in ->read_pages(), if those were remaining
in the pages_list.  So, readpages() just can ignore the remaining
pages in pages_list.

Signed-off-by: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
---

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

diff -puN mm/readahead.c~readpages-fixes mm/readahead.c
--- linux-2.6/mm/readahead.c~readpages-fixes	2006-10-31 04:45:38.000000000 +0900
+++ linux-2.6-hirofumi/mm/readahead.c	2006-10-31 04:46:37.000000000 +0900
@@ -167,6 +167,8 @@ static int read_pages(struct address_spa
 
 	if (mapping->a_ops->readpages) {
 		ret = mapping->a_ops->readpages(filp, mapping, pages, nr_pages);
+		/* Clean up the remaining pages */
+		put_pages_list(pages);
 		goto out;
 	}
 
_
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