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Commit 5459aa97 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

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: default avatarJaegeuk Kim <jaegeuk.kim@samsung.com>
parent bfad7c2d

fs/f2fs/checkpoint.c

+4 −3
Original line number Diff line number Diff line
@@ -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;