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f2fs: avoid to wait all the node blocks during fsync 

Previously, f2fs_sync_file() waits for all the node blocks to be written.
But, we don't need to do that, but wait only the inode-related node blocks.

This patch adds wait_on_node_pages_writeback() in which waits inode-related
node blocks that are on writeback.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim 2013-10-31 14:57:01 +09:00
parent 44c60bf2b9
commit cfe58f9dcd
3 changed files with 44 additions and 2 deletions
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1
fs/f2fs/f2fs.h
View File

@ -1026,6 +1026,7 @@ void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
int truncate_inode_blocks(struct inode *, pgoff_t);
int truncate_xattr_node(struct inode *, struct page *);
int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
int remove_inode_page(struct inode *);
struct page *new_inode_page(struct inode *, const struct qstr *);
struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);

5
fs/f2fs/file.c
View File

@ -189,8 +189,9 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
if (ret)
goto out;
}
filemap_fdatawait_range(sbi->node_inode->i_mapping,
0, LONG_MAX);
ret = wait_on_node_pages_writeback(sbi, inode->i_ino);
if (ret)
goto out;
ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
}
out:

40
fs/f2fs/node.c
View File

@ -1148,6 +1148,46 @@ continue_unlock:
return nwritten;
}
int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino)
{
struct address_space *mapping = sbi->node_inode->i_mapping;
pgoff_t index = 0, end = LONG_MAX;
struct pagevec pvec;
int nr_pages;
int ret2 = 0, ret = 0;
pagevec_init(&pvec, 0);
while ((index <= end) &&
(nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
PAGECACHE_TAG_WRITEBACK,
min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1)) != 0) {
unsigned i;
for (i = 0; i < nr_pages; i++) {
struct page *page = pvec.pages[i];
/* until radix tree lookup accepts end_index */
if (page->index > end)
continue;
if (ino && ino_of_node(page) == ino)
wait_on_page_writeback(page);
if (TestClearPageError(page))
ret = -EIO;
}
pagevec_release(&pvec);
cond_resched();
}
if (test_and_clear_bit(AS_ENOSPC, &mapping->flags))
ret2 = -ENOSPC;
if (test_and_clear_bit(AS_EIO, &mapping->flags))
ret2 = -EIO;
if (!ret)
ret = ret2;
return ret;
}
static int f2fs_write_node_page(struct page *page,
struct writeback_control *wbc)
{