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From: Yunlong Song <yunlong.song@huawei.com>
To: <jaegeuk@kernel.org>, <chao@kernel.org>, <yuchao0@huawei.com>,
	<yunlong.song@icloud.com>, <yunlong.song@huawei.com>
Cc: <miaoxie@huawei.com>, <bintian.wang@huawei.com>,
	<shengyong1@huawei.com>, <heyunlei@huawei.com>,
	<linux-f2fs-devel@lists.sourceforge.net>,
	<linux-kernel@vger.kernel.org>
Subject: [PATCH] f2fs: only flush the single temp bio cache which owns the target page
Date: Wed, 24 Oct 2018 16:10:51 +0800	[thread overview]
Message-ID: <1540368651-14353-1-git-send-email-yunlong.song@huawei.com> (raw)

Previously, when f2fs finds which temp bio cache owns the target page,
it will flush all the three temp bio caches, but we only need to flush
one single bio cache indeed, which can help to keep bio merged.

Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
---
 fs/f2fs/data.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 106f116..04ebbad 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -374,7 +374,7 @@ static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode,
 
 static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode,
 						struct page *page, nid_t ino,
-						enum page_type type)
+						enum page_type type, enum temp_type *owner)
 {
 	enum page_type btype = PAGE_TYPE_OF_BIO(type);
 	enum temp_type temp;
@@ -392,6 +392,10 @@ static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode,
 		if (ret || btype == META)
 			break;
 	}
+	if (!ret || (!inode && !page && !ino))
+		*owner = NR_TEMP_TYPE;
+	else
+		*owner = temp;
 	return ret;
 }
 
@@ -421,9 +425,14 @@ static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
 {
 	enum temp_type temp;
 
-	if (!force && !has_merged_page(sbi, inode, page, ino, type))
+	if (!force && !has_merged_page(sbi, inode, page, ino, type, &temp))
 		return;
 
+	if (!force && temp != NR_TEMP_TYPE) {
+		__f2fs_submit_merged_write(sbi, type, temp);
+		return;
+	}
+
 	for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
 
 		__f2fs_submit_merged_write(sbi, type, temp);
-- 
1.8.5.2


             reply	other threads:[~2018-10-24  8:11 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-24  8:10 Yunlong Song [this message]
2018-10-24  9:55 ` Chao Yu
2018-10-24 11:35 ` [PATCH v2] " Yunlong Song
2018-10-25  1:35   ` Chao Yu
2018-11-13  0:15   ` Jaegeuk Kim
2018-11-13  3:57 ` [PATCH v3] " Yunlong Song
2018-11-14 10:49   ` Chao Yu

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