From 29f3ad7d8380364c86556eedf4eedd3b3d4921dc Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Fri, 4 Nov 2016 18:08:11 +0100 Subject: fs: Provide function to unmap metadata for a range of blocks Provide function equivalent to unmap_underlying_metadata() for a range of blocks. We somewhat optimize the function to use pagevec lookups instead of looking up buffer heads one by one and use page lock to pin buffer heads instead of mapping's private_lock to improve scalability. Signed-off-by: Jan Kara Signed-off-by: Jens Axboe --- include/linux/buffer_head.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux/buffer_head.h') diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index ebbacd14d450..9c9c73ce7d4f 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -169,6 +169,8 @@ void invalidate_inode_buffers(struct inode *); int remove_inode_buffers(struct inode *inode); int sync_mapping_buffers(struct address_space *mapping); void unmap_underlying_metadata(struct block_device *bdev, sector_t block); +void clean_bdev_aliases(struct block_device *bdev, sector_t block, + sector_t len); void mark_buffer_async_write(struct buffer_head *bh); void __wait_on_buffer(struct buffer_head *); -- cgit v1.2.3 From e64855c6cfaa0a80c1b71c5f647cb792dc436668 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Fri, 4 Nov 2016 18:08:15 +0100 Subject: fs: Add helper to clean bdev aliases under a bh and use it Add a helper function that clears buffer heads from a block device aliasing passed bh. Use this helper function from filesystems instead of the original unmap_underlying_metadata() to save some boiler plate code and also have a better name for the functionalily since it is not unmapping anything for a *long* time. Signed-off-by: Jan Kara Signed-off-by: Jens Axboe --- include/linux/buffer_head.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux/buffer_head.h') diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 9c9c73ce7d4f..d1ab91fc6d43 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -171,6 +171,10 @@ int sync_mapping_buffers(struct address_space *mapping); void unmap_underlying_metadata(struct block_device *bdev, sector_t block); void clean_bdev_aliases(struct block_device *bdev, sector_t block, sector_t len); +static inline void clean_bdev_bh_alias(struct buffer_head *bh) +{ + clean_bdev_aliases(bh->b_bdev, bh->b_blocknr, 1); +} void mark_buffer_async_write(struct buffer_head *bh); void __wait_on_buffer(struct buffer_head *); -- cgit v1.2.3 From ce98321bf7d274a470642ef99e1d82512673ce7c Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Fri, 4 Nov 2016 18:08:16 +0100 Subject: fs: Remove unmap_underlying_metadata Nobody is using this function anymore. Remove it. Signed-off-by: Jan Kara Signed-off-by: Jens Axboe --- include/linux/buffer_head.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux/buffer_head.h') diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index d1ab91fc6d43..d67ab83823ad 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -168,7 +168,6 @@ int inode_has_buffers(struct inode *); void invalidate_inode_buffers(struct inode *); int remove_inode_buffers(struct inode *inode); int sync_mapping_buffers(struct address_space *mapping); -void unmap_underlying_metadata(struct block_device *bdev, sector_t block); void clean_bdev_aliases(struct block_device *bdev, sector_t block, sector_t len); static inline void clean_bdev_bh_alias(struct buffer_head *bh) -- cgit v1.2.3