This patch enhances writing dirty meta pages collectively in background.
During the file data writes, it'd better avoid to write small dirty meta pages
frequently.
So let's give a chance to collect a number of dirty meta pages for a while.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx>
---
fs/f2fs/checkpoint.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index f8c0749..2004b7b 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -108,17 +108,19 @@ static int f2fs_write_meta_pages(struct address_space *mapping,
{
struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
struct block_device *bdev = sbi->sb->s_bdev;
+ int nrpages = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
long written;
if (wbc->for_kupdate)
return 0;
- if (get_pages(sbi, F2FS_DIRTY_META) == 0)
+ /* collect a number of dirty meta pages and write together */
+ if (get_pages(sbi, F2FS_DIRTY_META) < nrpages)
return 0;
/* if mounting is failed, skip writing node pages */
mutex_lock(&sbi->cp_mutex);
- written = sync_meta_pages(sbi, META, bio_get_nr_vecs(bdev));
+ written = sync_meta_pages(sbi, META, nrpages);
mutex_unlock(&sbi->cp_mutex);
wbc->nr_to_write -= written;
return 0;
--
1.8.4.474.g128a96c
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