From e2705b0304778916db87831217ec642e34d9d9fa Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Mon, 29 Jun 2020 14:49:20 -0700 Subject: xfs: remove xfs_inobp_check() This debug code is called on every xfs_iflush() call, which then checks every inode in the buffer for non-zero unlinked list field. Hence it checks every inode in the cluster buffer every time a single inode on that cluster it flushed. This is resulting in: - 38.91% 5.33% [kernel] [k] xfs_iflush - 17.70% xfs_iflush - 9.93% xfs_inobp_check 4.36% xfs_buf_offset 10% of the CPU time spent flushing inodes is repeatedly checking unlinked fields in the buffer. We don't need to do this. The other place we call xfs_inobp_check() is xfs_iunlink_update_dinode(), and this is after we've done this assert for the agino we are about to write into that inode: ASSERT(xfs_verify_agino_or_null(mp, agno, next_agino)); which means we've already checked that the agino we are about to write is not 0 on debug kernels. The inode buffer verifiers do everything else we need, so let's just remove this debug code. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_inode_buf.h | 6 ------ 1 file changed, 6 deletions(-) (limited to 'fs/xfs/libxfs/xfs_inode_buf.h') diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h index 865ac493c72a..6b08b9d060c2 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.h +++ b/fs/xfs/libxfs/xfs_inode_buf.h @@ -52,12 +52,6 @@ int xfs_inode_from_disk(struct xfs_inode *ip, struct xfs_dinode *from); void xfs_log_dinode_to_disk(struct xfs_log_dinode *from, struct xfs_dinode *to); -#if defined(DEBUG) -void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *); -#else -#define xfs_inobp_check(mp, bp) -#endif /* DEBUG */ - xfs_failaddr_t xfs_dinode_verify(struct xfs_mount *mp, xfs_ino_t ino, struct xfs_dinode *dip); xfs_failaddr_t xfs_inode_validate_extsize(struct xfs_mount *mp, -- cgit