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f2fs: use wait_for_stable_page to avoid contention

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In write_begin, if storage supports stable_page, we don't need to wait for
writeback to update its contents.
This patch introduces to use wait_for_stable_page instead of
wait_on_page_writeback.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2016-01-20 23:43:51 +08:00
parent 718e53fa63
commit fec1d6576c
13 changed files with 47 additions and 42 deletions
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12
fs/f2fs/segment.c
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@@ -223,7 +223,8 @@ int commit_inmem_pages(struct inode *inode, bool abort)
if (!abort) {
if (cur->page->mapping == inode->i_mapping) {
set_page_dirty(cur->page);
f2fs_wait_on_page_writeback(cur->page, DATA);
f2fs_wait_on_page_writeback(cur->page, DATA,
true);
if (clear_page_dirty_for_io(cur->page))
inode_dec_dirty_pages(inode);
trace_f2fs_commit_inmem_page(cur->page, INMEM);
@@ -1416,14 +1417,17 @@ void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
}
void f2fs_wait_on_page_writeback(struct page *page,
enum page_type type)
enum page_type type, bool ordered)
{
if (PageWriteback(page)) {
struct f2fs_sb_info *sbi = F2FS_P_SB(page);
if (is_merged_page(sbi, page, type))
f2fs_submit_merged_bio(sbi, type, WRITE);
wait_on_page_writeback(page);
if (ordered)
wait_on_page_writeback(page);
else
wait_for_stable_page(page);
}
}
@@ -1439,7 +1443,7 @@ void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *sbi,
cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
if (cpage) {
f2fs_wait_on_page_writeback(cpage, DATA);
f2fs_wait_on_page_writeback(cpage, DATA, true);
f2fs_put_page(cpage, 1);
}
}