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f2fs: do not skip writing data pages

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For data pages, let's try to flush as much as possible in background.

On /dev/pmem0,

1. dd if=/dev/zero of=/mnt/test/testfile bs=1M count=2048 conv=fsync
 Before : 800 MB/s
 After  : 1.1 GB/s

2. dd if=/dev/zero of=/mnt/test/testfile bs=1M count=2048
 Before : 1.3 GB/s
 After  : 2.2 GB/s

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-05-25 17:17:56 -07:00
parent 53aa6bbfda
commit 28ea6162e2
2 changed files with 6 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

11
fs/f2fs/data.c
View file

@ -1444,7 +1444,6 @@ static int f2fs_write_data_pages(struct address_space *mapping,
struct inode *inode = mapping->host; struct inode *inode = mapping->host;
struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
int ret; int ret;
long diff;
/* deal with chardevs and other special file */ /* deal with chardevs and other special file */
if (!mapping->a_ops->writepage) if (!mapping->a_ops->writepage)
@ -1469,14 +1468,14 @@ static int f2fs_write_data_pages(struct address_space *mapping,
trace_f2fs_writepages(mapping->host, wbc, DATA); trace_f2fs_writepages(mapping->host, wbc, DATA);
diff = nr_pages_to_write(sbi, DATA, wbc);
ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping);
f2fs_submit_merged_bio_cond(sbi, inode, NULL, 0, DATA, WRITE); /*
* if some pages were truncated, we cannot guarantee its mapping->host
* to detect pending bios.
*/
f2fs_submit_merged_bio(sbi, DATA, WRITE);
remove_dirty_inode(inode); remove_dirty_inode(inode);
wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff);
return ret; return ret;
skip_write: skip_write:

4
fs/f2fs/segment.h
View file

@ -728,9 +728,7 @@ static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type,
nr_to_write = wbc->nr_to_write; nr_to_write = wbc->nr_to_write;
if (type == DATA) if (type == NODE)
desired = 4096;
else if (type == NODE)
desired = 3 * max_hw_blocks(sbi); desired = 3 * max_hw_blocks(sbi);
else else
desired = MAX_BIO_BLOCKS(sbi); desired = MAX_BIO_BLOCKS(sbi);