From: Brian Foster Date: Fri, 1 Feb 2019 17:14:22 +0000 (-0800) Subject: xfs: update fork seq counter on data fork changes X-Git-Tag: v5.4-rc1~1389^2~59 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9f9bc034b84958523689347ee2bdd9c660008e5e;p=platform%2Fkernel%2Flinux-rpi.git xfs: update fork seq counter on data fork changes The sequence counter in the xfs_ifork structure is only updated on COW forks. This is because the counter is currently only used to optimize out repetitive COW fork checks at writeback time. Tweak the extent code to update the seq counter regardless of the fork type in preparation for using this counter on data forks as well. Signed-off-by: Brian Foster Reviewed-by: Christoph Hellwig Reviewed-by: Allison Henderson Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- diff --git a/fs/xfs/libxfs/xfs_iext_tree.c b/fs/xfs/libxfs/xfs_iext_tree.c index 771dd07..bc690f2 100644 --- a/fs/xfs/libxfs/xfs_iext_tree.c +++ b/fs/xfs/libxfs/xfs_iext_tree.c @@ -614,16 +614,15 @@ xfs_iext_realloc_root( } /* - * Increment the sequence counter if we are on a COW fork. This allows - * the writeback code to skip looking for a COW extent if the COW fork - * hasn't changed. We use WRITE_ONCE here to ensure the update to the - * sequence counter is seen before the modifications to the extent - * tree itself take effect. + * Increment the sequence counter on extent tree changes. If we are on a COW + * fork, this allows the writeback code to skip looking for a COW extent if the + * COW fork hasn't changed. We use WRITE_ONCE here to ensure the update to the + * sequence counter is seen before the modifications to the extent tree itself + * take effect. */ static inline void xfs_iext_inc_seq(struct xfs_ifork *ifp, int state) { - if (state & BMAP_COWFORK) - WRITE_ONCE(ifp->if_seq, READ_ONCE(ifp->if_seq) + 1); + WRITE_ONCE(ifp->if_seq, READ_ONCE(ifp->if_seq) + 1); } void diff --git a/fs/xfs/libxfs/xfs_inode_fork.h b/fs/xfs/libxfs/xfs_inode_fork.h index 60361d2..00c62ce 100644 --- a/fs/xfs/libxfs/xfs_inode_fork.h +++ b/fs/xfs/libxfs/xfs_inode_fork.h @@ -14,7 +14,7 @@ struct xfs_dinode; */ struct xfs_ifork { int if_bytes; /* bytes in if_u1 */ - unsigned int if_seq; /* cow fork mod counter */ + unsigned int if_seq; /* fork mod counter */ struct xfs_btree_block *if_broot; /* file's incore btree root */ short if_broot_bytes; /* bytes allocated for root */ unsigned char if_flags; /* per-fork flags */