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From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-mm@kvack.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
	linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org
Subject: [PATCH v2 4/4] mm: Remove nrexceptional from inode
Date: Mon, 26 Oct 2020 15:18:49 +0000	[thread overview]
Message-ID: <20201026151849.24232-5-willy@infradead.org> (raw)
In-Reply-To: <20201026151849.24232-1-willy@infradead.org>

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(-)

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;
-- 
2.28.0
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WARNING: multiple messages have this Message-ID (diff)
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-mm@kvack.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
	linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org,
	Vishal Verma <vishal.l.verma@intel.com>
Subject: [PATCH v2 4/4] mm: Remove nrexceptional from inode
Date: Mon, 26 Oct 2020 15:18:49 +0000	[thread overview]
Message-ID: <20201026151849.24232-5-willy@infradead.org> (raw)
In-Reply-To: <20201026151849.24232-1-willy@infradead.org>

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(-)

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;
-- 
2.28.0


  parent reply	other threads:[~2020-10-26 15:19 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-26 15:18 [PATCH v2 0/4] Remove nrexceptional tracking Matthew Wilcox (Oracle)
2020-10-26 15:18 ` Matthew Wilcox (Oracle)
2020-10-26 15:18 ` [PATCH v2 1/4] mm: Introduce and use mapping_empty Matthew Wilcox (Oracle)
2020-10-26 15:18   ` Matthew Wilcox (Oracle)
2021-01-21 20:42   ` Johannes Weiner
2021-01-21 20:42     ` Johannes Weiner
2021-01-21 21:18     ` Matthew Wilcox
2021-01-21 21:18       ` Matthew Wilcox
2020-10-26 15:18 ` [PATCH v2 2/4] mm: Stop accounting shadow entries Matthew Wilcox (Oracle)
2020-10-26 15:18   ` Matthew Wilcox (Oracle)
2021-01-21 20:44   ` Johannes Weiner
2021-01-21 20:44     ` Johannes Weiner
2020-10-26 15:18 ` [PATCH v2 3/4] dax: Account DAX entries as nrpages Matthew Wilcox (Oracle)
2020-10-26 15:18   ` Matthew Wilcox (Oracle)
2021-01-21 20:46   ` Johannes Weiner
2021-01-21 20:46     ` Johannes Weiner
2020-10-26 15:18 ` Matthew Wilcox (Oracle) [this message]
2020-10-26 15:18   ` [PATCH v2 4/4] mm: Remove nrexceptional from inode Matthew Wilcox (Oracle)
2021-01-21 20:47   ` Johannes Weiner
2021-01-21 20:47     ` Johannes Weiner
2021-01-21 18:43 ` [PATCH v2 0/4] Remove nrexceptional tracking Matthew Wilcox
2021-01-21 18:43   ` Matthew Wilcox
2021-03-13  2:35   ` Matthew Wilcox
2021-03-13  2:35     ` Matthew Wilcox
2021-01-22 19:38 ` William Kucharski
2021-01-22 19:38   ` William Kucharski

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