nilfs2: move out mark_inode_dirty calls from bmap routines

Previously, nilfs_bmap_add_blocks() and nilfs_bmap_sub_blocks() called
mark_inode_dirty() after they changed the number of data blocks.

This moves these calls outside bmap outermost functions like
nilfs_bmap_insert() or nilfs_bmap_truncate().

This will mitigate overhead for truncate or delete operation since
they repeatedly remove set of blocks.  Nearly 10 percent improvement
was observed for removal of a large file:

 # dd if=/dev/zero of=/test/aaa bs=1M count=512
 # time rm /test/aaa

  real  2.968s -> 2.705s

Further optimization may be possible by eliminating these
mark_inode_dirty() uses though I avoid mixing separate changes here.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 412b25a7d345..a16c179f2b9a 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -97,6 +97,7 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
                         nilfs_transaction_abort(inode->i_sb);
                         goto out;
                 }
+                mark_inode_dirty(inode);
                 nilfs_transaction_commit(inode->i_sb); /* never fails */
                 /* Error handling should be detailed */
                 set_buffer_new(bh_result);
@@ -598,6 +599,7 @@ void nilfs_truncate(struct inode *inode)
         if (IS_SYNC(inode))
                 nilfs_set_transaction_flag(NILFS_TI_SYNC);
 
+        mark_inode_dirty(inode);
         nilfs_set_file_dirty(NILFS_SB(sb), inode, 0);
         nilfs_transaction_commit(sb);
         /* May construct a logical segment and may fail in sync mode.
@@ -622,6 +624,7 @@ void nilfs_delete_inode(struct inode *inode)
                 truncate_inode_pages(&inode->i_data, 0);
 
         nilfs_truncate_bmap(ii, 0);
+        mark_inode_dirty(inode);
         nilfs_free_inode(inode);
         /* nilfs_free_inode() marks inode buffer dirty */
         if (IS_SYNC(inode))