linux-kernel - Re: [PATCH 2/3 v2] f2fs: fix to decrease the number of dirty dentry page

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Date:	Wed, 16 Apr 2014 14:10:52 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	linux-fsdevel@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH 2/3 v2] f2fs: fix to decrease the number of dirty dentry
 page

Change log from v1:
 o change the patch, which includes this bug fix

>From 0f3b8427b40b9ace829ba0b16336d5cd67589022 Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk.kim@...sung.com>
Date: Tue, 15 Apr 2014 16:04:15 +0900
Subject: [PATCH] f2fs: call redirty_page_for_writepage

This patch replace some general codes with redirty_page_for_writepage,
which
can be enabled after consideration on additional procedure like counting
dirty
pages appropriately.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
---
 fs/f2fs/checkpoint.c |  5 +----
 fs/f2fs/data.c       | 10 +++-------
 fs/f2fs/node.c       |  5 +----
 3 files changed, 5 insertions(+), 15 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 890e23d..2902f7d 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -174,10 +174,7 @@ no_write:
 	return 0;
 
 redirty_out:
-	dec_page_count(sbi, F2FS_DIRTY_META);
-	wbc->pages_skipped++;
-	account_page_redirty(page);
-	set_page_dirty(page);
+	redirty_page_for_writepage(wbc, page);
 	return AOP_WRITEPAGE_ACTIVATE;
 }
 
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 45abd60..b5cd6d1 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -798,10 +798,8 @@ static int f2fs_write_data_page(struct page *page,
 	 * this page does not have to be written to disk.
 	 */
 	offset = i_size & (PAGE_CACHE_SIZE - 1);
-	if ((page->index >= end_index + 1) || !offset) {
-		inode_dec_dirty_dents(inode);
+	if ((page->index >= end_index + 1) || !offset)
 		goto out;
-	}
 
 	zero_user_segment(page, offset, PAGE_CACHE_SIZE);
 write:
@@ -810,7 +808,6 @@ write:
 
 	/* Dentry blocks are controlled by checkpoint */
 	if (S_ISDIR(inode->i_mode)) {
-		inode_dec_dirty_dents(inode);
 		err = do_write_data_page(page, &fio);
 		goto done;
 	}
@@ -832,15 +829,14 @@ done:
 
 	clear_cold_data(page);
 out:
+	inode_dec_dirty_dents(inode);
 	unlock_page(page);
 	if (need_balance_fs)
 		f2fs_balance_fs(sbi);
 	return 0;
 
 redirty_out:
-	wbc->pages_skipped++;
-	account_page_redirty(page);
-	set_page_dirty(page);
+	redirty_page_for_writepage(wbc, page);
 	return AOP_WRITEPAGE_ACTIVATE;
 }
 
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index a161e95..f760793 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1227,10 +1227,7 @@ static int f2fs_write_node_page(struct page
*page,
 	return 0;
 
 redirty_out:
-	dec_page_count(sbi, F2FS_DIRTY_NODES);
-	wbc->pages_skipped++;
-	account_page_redirty(page);
-	set_page_dirty(page);
+	redirty_page_for_writepage(wbc, page);
 	return AOP_WRITEPAGE_ACTIVATE;
 }
 
-- 
1.8.4.474.g128a96c


-- 
Jaegeuk Kim
Samsung

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