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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 <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim 2013-12-17 17:28:41 +09:00
parent bfad7c2d40
commit 5459aa9770
1 changed files with 4 additions and 3 deletions
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7
fs/f2fs/checkpoint.c
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@ -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;