f2fs: avoid small data writes by skipping writepages
This patch introduces nr_pages_to_skip(sbi, type) to determine writepages can
be skipped.
The dentry, node, and meta pages can be conrolled by F2FS without breaking the
FS consistency.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 4c0e98d..1f52b70 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -187,7 +187,7 @@
struct writeback_control *wbc)
{
struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
- int nrpages = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
+ int nrpages = nr_pages_to_skip(sbi, META);
long written;
if (wbc->for_kupdate)
@@ -682,7 +682,7 @@
inode = igrab(entry->inode);
spin_unlock(&sbi->dir_inode_lock);
if (inode) {
- filemap_flush(inode->i_mapping);
+ filemap_fdatawrite(inode->i_mapping);
iput(inode);
} else {
/*