From ff37355886ac2082cee594aa949c08e2cfb33aa0 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Tue, 29 Mar 2016 16:13:45 -0700 Subject: [PATCH] f2fs: add BUG_ON to avoid unnecessary flow This patch adds BUG_ON instead of retrying loop. In the case of node pages, we already got this inode page, but unlocked it. By the fact that we don't truncate any node pages in operations, the page's mapping should be unchangeable. Signed-off-by: Jaegeuk Kim --- fs/f2fs/node.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index ade221c9756b..095fc2c96e16 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -832,7 +832,7 @@ int truncate_inode_blocks(struct inode *inode, pgoff_t from) trace_f2fs_truncate_inode_blocks_enter(inode, from); level = get_node_path(inode, from, offset, noffset); -restart: + page = get_node_page(sbi, inode->i_ino); if (IS_ERR(page)) { trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); @@ -896,10 +896,7 @@ skip_partial: if (offset[1] == 0 && ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { lock_page(page); - if (unlikely(page->mapping != NODE_MAPPING(sbi))) { - f2fs_put_page(page, 1); - goto restart; - } + BUG_ON(page->mapping != NODE_MAPPING(sbi)); f2fs_wait_on_page_writeback(page, NODE, true); ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; set_page_dirty(page); -- 2.30.2