Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "A large number of cleanups and bug fixes, with some (minor) journal
  optimizations"

[ This got sent to me before -rc1, but was stuck in my spam folder.   - Linus ]

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (67 commits)
  ext4: check s_chksum_driver when looking for bg csum presence
  ext4: move error report out of atomic context in ext4_init_block_bitmap()
  ext4: Replace open coded mdata csum feature to helper function
  ext4: delete useless comments about ext4_move_extents
  ext4: fix reservation overflow in ext4_da_write_begin
  ext4: add ext4_iget_normal() which is to be used for dir tree lookups
  ext4: don't orphan or truncate the boot loader inode
  ext4: grab missed write_count for EXT4_IOC_SWAP_BOOT
  ext4: optimize block allocation on grow indepth
  ext4: get rid of code duplication
  ext4: fix over-defensive complaint after journal abort
  ext4: fix return value of ext4_do_update_inode
  ext4: fix mmap data corruption when blocksize < pagesize
  vfs: fix data corruption when blocksize < pagesize for mmaped data
  ext4: fold ext4_nojournal_sops into ext4_sops
  ext4: support freezing ext2 (nojournal) file systems
  ext4: fold ext4_sync_fs_nojournal() into ext4_sync_fs()
  ext4: don't check quota format when there are no quota files
  jbd2: simplify calling convention around __jbd2_journal_clean_checkpoint_list
  jbd2: avoid pointless scanning of checkpoint lists
  ...

4 files changed, 95 insertions, 14 deletions

diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 324329ceea1e..73b45225a7ca 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -175,12 +175,13 @@ void __wait_on_buffer(struct buffer_head *);
 wait_queue_head_t *bh_waitq_head(struct buffer_head *bh);
 struct buffer_head *__find_get_block(struct block_device *bdev, sector_t block,
 			unsigned size);
-struct buffer_head *__getblk(struct block_device *bdev, sector_t block,
-			unsigned size);
+struct buffer_head *__getblk_gfp(struct block_device *bdev, sector_t block,
+				  unsigned size, gfp_t gfp);
 void __brelse(struct buffer_head *);
 void __bforget(struct buffer_head *);
 void __breadahead(struct block_device *, sector_t block, unsigned int size);
-struct buffer_head *__bread(struct block_device *, sector_t block, unsigned size);
+struct buffer_head *__bread_gfp(struct block_device *,
+				sector_t block, unsigned size, gfp_t gfp);
 void invalidate_bh_lrus(void);
 struct buffer_head *alloc_buffer_head(gfp_t gfp_flags);
 void free_buffer_head(struct buffer_head * bh);
@@ -295,7 +296,13 @@ static inline void bforget(struct buffer_head *bh)
 static inline struct buffer_head *
 sb_bread(struct super_block *sb, sector_t block)
 {
-	return __bread(sb->s_bdev, block, sb->s_blocksize);
+	return __bread_gfp(sb->s_bdev, block, sb->s_blocksize, __GFP_MOVABLE);
+}
+
+static inline struct buffer_head *
+sb_bread_unmovable(struct super_block *sb, sector_t block)
+{
+	return __bread_gfp(sb->s_bdev, block, sb->s_blocksize, 0);
 }
 
 static inline void
@@ -307,7 +314,7 @@ sb_breadahead(struct super_block *sb, sector_t block)
 static inline struct buffer_head *
 sb_getblk(struct super_block *sb, sector_t block)
 {
-	return __getblk(sb->s_bdev, block, sb->s_blocksize);
+	return __getblk_gfp(sb->s_bdev, block, sb->s_blocksize, __GFP_MOVABLE);
 }
 
 static inline struct buffer_head *
@@ -344,6 +351,36 @@ static inline void lock_buffer(struct buffer_head *bh)
 		__lock_buffer(bh);
 }
 
+static inline struct buffer_head *getblk_unmovable(struct block_device *bdev,
+						   sector_t block,
+						   unsigned size)
+{
+	return __getblk_gfp(bdev, block, size, 0);
+}
+
+static inline struct buffer_head *__getblk(struct block_device *bdev,
+					   sector_t block,
+					   unsigned size)
+{
+	return __getblk_gfp(bdev, block, size, __GFP_MOVABLE);
+}
+
+/**
+ *  __bread() - reads a specified block and returns the bh
+ *  @bdev: the block_device to read from
+ *  @block: number of block
+ *  @size: size (in bytes) to read
+ *
+ *  Reads a specified block, and returns buffer head that contains it.
+ *  The page cache is allocated from movable area so that it can be migrated.
+ *  It returns NULL if the block was unreadable.
+ */
+static inline struct buffer_head *
+__bread(struct block_device *bdev, sector_t block, unsigned size)
+{
+	return __bread_gfp(bdev, block, size, __GFP_MOVABLE);
+}
+
 extern int __set_page_dirty_buffers(struct page *page);
 
 #else /* CONFIG_BLOCK */
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 0dae71e9971c..704b9a599b26 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -1042,7 +1042,7 @@ void jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block);
 extern void jbd2_journal_commit_transaction(journal_t *);
 
 /* Checkpoint list management */
-int __jbd2_journal_clean_checkpoint_list(journal_t *journal);
+void __jbd2_journal_clean_checkpoint_list(journal_t *journal);
 int __jbd2_journal_remove_checkpoint(struct journal_head *);
 void __jbd2_journal_insert_checkpoint(struct journal_head *, transaction_t *);
 
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 02d11ee7f19d..27eb1bfbe704 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1176,6 +1176,7 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
 
 extern void truncate_pagecache(struct inode *inode, loff_t new);
 extern void truncate_setsize(struct inode *inode, loff_t newsize);
+void pagecache_isize_extended(struct inode *inode, loff_t from, loff_t to);
 void truncate_pagecache_range(struct inode *inode, loff_t offset, loff_t end);
 int truncate_inode_page(struct address_space *mapping, struct page *page);
 int generic_error_remove_page(struct address_space *mapping, struct page *page);
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index d4f70a7fe876..ff4bd1b35246 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -2369,7 +2369,7 @@ TRACE_EVENT(ext4_es_lookup_extent_exit,
 		  show_extent_status(__entry->found ? __entry->status : 0))
 );
 
-TRACE_EVENT(ext4_es_shrink_enter,
+DECLARE_EVENT_CLASS(ext4__es_shrink_enter,
 	TP_PROTO(struct super_block *sb, int nr_to_scan, int cache_cnt),
 
 	TP_ARGS(sb, nr_to_scan, cache_cnt),
@@ -2391,26 +2391,38 @@ TRACE_EVENT(ext4_es_shrink_enter,
 		  __entry->nr_to_scan, __entry->cache_cnt)
 );
 
-TRACE_EVENT(ext4_es_shrink_exit,
-	TP_PROTO(struct super_block *sb, int shrunk_nr, int cache_cnt),
+DEFINE_EVENT(ext4__es_shrink_enter, ext4_es_shrink_count,
+	TP_PROTO(struct super_block *sb, int nr_to_scan, int cache_cnt),
 
-	TP_ARGS(sb, shrunk_nr, cache_cnt),
+	TP_ARGS(sb, nr_to_scan, cache_cnt)
+);
+
+DEFINE_EVENT(ext4__es_shrink_enter, ext4_es_shrink_scan_enter,
+	TP_PROTO(struct super_block *sb, int nr_to_scan, int cache_cnt),
+
+	TP_ARGS(sb, nr_to_scan, cache_cnt)
+);
+
+TRACE_EVENT(ext4_es_shrink_scan_exit,
+	TP_PROTO(struct super_block *sb, int nr_shrunk, int cache_cnt),
+
+	TP_ARGS(sb, nr_shrunk, cache_cnt),
 
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
-		__field(	int,	shrunk_nr		)
+		__field(	int,	nr_shrunk		)
 		__field(	int,	cache_cnt		)
 	),
 
 	TP_fast_assign(
 		__entry->dev		= sb->s_dev;
-		__entry->shrunk_nr	= shrunk_nr;
+		__entry->nr_shrunk	= nr_shrunk;
 		__entry->cache_cnt	= cache_cnt;
 	),
 
-	TP_printk("dev %d,%d shrunk_nr %d cache_cnt %d",
+	TP_printk("dev %d,%d nr_shrunk %d cache_cnt %d",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
-		  __entry->shrunk_nr, __entry->cache_cnt)
+		  __entry->nr_shrunk, __entry->cache_cnt)
 );
 
 TRACE_EVENT(ext4_collapse_range,
@@ -2438,6 +2450,37 @@ TRACE_EVENT(ext4_collapse_range,
 		  __entry->offset, __entry->len)
 );
 
+TRACE_EVENT(ext4_es_shrink,
+	TP_PROTO(struct super_block *sb, int nr_shrunk, u64 scan_time,
+		 int skip_precached, int nr_skipped, int retried),
+
+	TP_ARGS(sb, nr_shrunk, scan_time, skip_precached, nr_skipped, retried),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,		dev		)
+		__field(	int,		nr_shrunk	)
+		__field(	unsigned long long, scan_time	)
+		__field(	int,		skip_precached	)
+		__field(	int,		nr_skipped	)
+		__field(	int,		retried		)
+	),
+
+	TP_fast_assign(
+		__entry->dev		= sb->s_dev;
+		__entry->nr_shrunk	= nr_shrunk;
+		__entry->scan_time	= div_u64(scan_time, 1000);
+		__entry->skip_precached = skip_precached;
+		__entry->nr_skipped	= nr_skipped;
+		__entry->retried	= retried;
+	),
+
+	TP_printk("dev %d,%d nr_shrunk %d, scan_time %llu skip_precached %d "
+		  "nr_skipped %d retried %d",
+		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->nr_shrunk,
+		  __entry->scan_time, __entry->skip_precached,
+		  __entry->nr_skipped, __entry->retried)
+);
+
 #endif /* _TRACE_EXT4_H */
 
 /* This part must be outside protection */