From d260081ccf37f57b74396ec48f415f27d1b01b13 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Wed, 8 Feb 2017 17:39:45 +0800 Subject: f2fs: change recovery policy of xattr node block Currently, if we call fsync after updating the xattr date belongs to the file, f2fs needs to trigger checkpoint to keep xattr data consistent. But, this policy cause low performance as checkpoint will block most foreground operations and cause unneeded and unrelated IOs around checkpoint. This patch will reuse regular file recovery policy for xattr node block, so, we change to write xattr node block tagged with fsync flag to warm area instead of cold area, and during recovery, we search warm node chain for fsynced xattr block, and do the recovery. So, for below application IO pattern, performance can be improved obviously: - touch file - create/update/delete xattr entry in file - fsync file Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/node.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/f2fs/node.h') diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h index 29ff783eb9c3..d3d289306469 100644 --- a/fs/f2fs/node.h +++ b/fs/f2fs/node.h @@ -358,7 +358,7 @@ static inline bool IS_DNODE(struct page *node_page) unsigned int ofs = ofs_of_node(node_page); if (f2fs_has_xattr_block(ofs)) - return false; + return true; if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK || ofs == 5 + 2 * NIDS_PER_BLOCK) -- cgit v1.2.3-58-ga151