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From: Jan Kara <jack@suse.cz>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Kara <jack@suse.cz>,
	linux-f2fs-devel@lists.sourceforge.net, linux-mm@kvack.org,
	linux-fsdevel@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>,
	Daniel Jordan <daniel.m.jordan@oracle.com>
Subject: [PATCH 07/16] f2fs: Use find_get_pages_tag() for looking up single page
Date: Mon,  9 Oct 2017 17:13:50 +0200
Message-ID: <20171009151359.31984-8-jack@suse.cz> (raw)
In-Reply-To: <20171009151359.31984-1-jack@suse.cz>

__get_first_dirty_index() wants to lookup only the first dirty page
after given index. There's no point in using pagevec_lookup_tag() for
that. Just use find_get_pages_tag() directly.

CC: Jaegeuk Kim <jaegeuk@kernel.org>
CC: linux-f2fs-devel@lists.sourceforge.net
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/f2fs/file.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 517e112c8a9a..f78b76ec4707 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -313,18 +313,19 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 static pgoff_t __get_first_dirty_index(struct address_space *mapping,
 						pgoff_t pgofs, int whence)
 {
-	struct pagevec pvec;
+	struct page *page;
 	int nr_pages;
 
 	if (whence != SEEK_DATA)
 		return 0;
 
 	/* find first dirty page index */
-	pagevec_init(&pvec, 0);
-	nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
-					PAGECACHE_TAG_DIRTY, 1);
-	pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX;
-	pagevec_release(&pvec);
+	nr_pages = find_get_pages_tag(mapping, &pgofs, PAGECACHE_TAG_DIRTY,
+				      1, &page);
+	if (!nr_pages)
+		return ULONG_MAX;
+	pgofs = page->index;
+	put_page(page);
 	return pgofs;
 }
 
-- 
2.12.3


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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20171009151359.31984-1-jack@suse.cz>
2017-10-09 15:13 ` [PATCH 05/16] f2fs: Use pagevec_lookup_range_tag() Jan Kara
2017-10-09 15:13 ` [PATCH 06/16] f2fs: Simplify page iteration loops Jan Kara
2017-10-09 15:13 ` Jan Kara [this message]

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