From 5459aa9770fe2e8c6a660a0985ea454c42cfd8c1 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Tue, 17 Dec 2013 17:28:41 +0900 Subject: [PATCH] f2fs: write dirty meta pages collectively 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 --- fs/f2fs/checkpoint.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index f8c074961e0a..2fc3b6beaeb8 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -107,18 +107,19 @@ static int f2fs_write_meta_pages(struct address_space *mapping, struct writeback_control *wbc) { 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; -- 2.20.1