[PATCH 3/3] f2fs: avoid latency-critical readahead of node pages

From	Jaegeuk Kim <jaegeuk@kernel.org>
Newsgroups	linux.kernel
Subject	[PATCH 3/3] f2fs: avoid latency-critical readahead of node pages
Date	2016-06-18 03:10 +0200
Message-ID	<rLcVP-5DA-11@gated-at.bofh.it> (permalink)
References	<rLcVP-5DA-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

The f2fs_map_blocks is very related to the performance, so let's avoid any
latency to read ahead node pages.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/data.c | 2 +-
 fs/f2fs/file.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 0832528..ba4963f 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -652,7 +652,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
 	unsigned int maxblocks = map->m_len;
 	struct dnode_of_data dn;
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
-	int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA;
+	int mode = create ? ALLOC_NODE : LOOKUP_NODE;
 	pgoff_t pgofs, end_offset, end;
 	int err = 0, ofs = 1;
 	unsigned int ofs_in_node, last_ofs_in_node;
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f1f78fb..4e220ba 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -356,7 +356,7 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
 
 	for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
 		set_new_dnode(&dn, inode, NULL, NULL, 0);
-		err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA);
+		err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
 		if (err && err != -ENOENT) {
 			goto fail;
 		} else if (err == -ENOENT) {
-- 
2.8.3

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATCH 3/3] f2fs: avoid latency-critical readahead of node pages Jaegeuk Kim <jaegeuk@kernel.org> - 2016-06-18 03:10 +0200

csiph-web