diff mbox series

[v2,4/4] mm: Remove nrexceptional from inode

Message ID 20201026151849.24232-5-willy@infradead.org (mailing list archive)
State New, archived
Headers show
Series Remove nrexceptional tracking | expand

Commit Message

Matthew Wilcox Oct. 26, 2020, 3:18 p.m. UTC 
We no longer track anything in nrexceptional, so remove it, saving 8
bytes per inode.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Vishal Verma <vishal.l.verma@intel.com>
---
 fs/inode.c         | 2 +-
 include/linux/fs.h | 2 --
 2 files changed, 1 insertion(+), 3 deletions(-)

Comments

Johannes Weiner Jan. 21, 2021, 8:47 p.m. UTC | #1 
On Mon, Oct 26, 2020 at 03:18:49PM +0000, Matthew Wilcox (Oracle) wrote:
> We no longer track anything in nrexceptional, so remove it, saving 8
> bytes per inode.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> Tested-by: Vishal Verma <vishal.l.verma@intel.com>

Acked-by: Johannes Weiner <hannes@cmpxchg.org>
diff mbox series

Patch

diff --git a/fs/inode.c b/fs/inode.c
index 9d78c37b00b8..4531358ae97b 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -530,7 +530,7 @@  void clear_inode(struct inode *inode)
 	 */
 	xa_lock_irq(&inode->i_data.i_pages);
 	BUG_ON(inode->i_data.nrpages);
-	BUG_ON(inode->i_data.nrexceptional);
+	BUG_ON(!mapping_empty(&inode->i_data));
 	xa_unlock_irq(&inode->i_data.i_pages);
 	BUG_ON(!list_empty(&inode->i_data.private_list));
 	BUG_ON(!(inode->i_state & I_FREEING));
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0bd126418bb6..a5d801430040 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -439,7 +439,6 @@  int pagecache_write_end(struct file *, struct address_space *mapping,
  * @i_mmap: Tree of private and shared mappings.
  * @i_mmap_rwsem: Protects @i_mmap and @i_mmap_writable.
  * @nrpages: Number of page entries, protected by the i_pages lock.
- * @nrexceptional: Shadow or DAX entries, protected by the i_pages lock.
  * @writeback_index: Writeback starts here.
  * @a_ops: Methods.
  * @flags: Error bits and flags (AS_*).
@@ -460,7 +459,6 @@  struct address_space {
 	struct rb_root_cached	i_mmap;
 	struct rw_semaphore	i_mmap_rwsem;
 	unsigned long		nrpages;
-	unsigned long		nrexceptional;
 	pgoff_t			writeback_index;
 	const struct address_space_operations *a_ops;
 	unsigned long		flags;