Commit 97d6fb1b authored by Yuezhang Mo's avatar Yuezhang Mo Committed by Namjae Jeon
Browse files

block: add sync_blockdev_range() 



sync_blockdev_range() is to support syncing multiple sectors
with as few block device requests as possible, it is helpful
to make the block device to give full play to its performance.

Signed-off-by: default avatarYuezhang Mo <Yuezhang.Mo@sony.com>
Suggested-by: default avatarChristoph Hellwig <hch@infradead.org>
Reviewed-by: default avatarAndy Wu <Andy.Wu@sony.com>
Reviewed-by: default avatarAoyama Wataru <wataru.aoyama@sony.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJens Axboe <axboe@kernel.dk>
Acked-by: default avatarSungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: default avatarNamjae Jeon <linkinjeon@kernel.org>
parent 9b002894

block/bdev.c

+7 −0
Original line number Diff line number Diff line
@@ -200,6 +200,13 @@ int sync_blockdev(struct block_device *bdev) 
}

EXPORT_SYMBOL(sync_blockdev);



int sync_blockdev_range(struct block_device *bdev, loff_t lstart, loff_t lend)

{

	return filemap_write_and_wait_range(bdev->bd_inode->i_mapping,

			lstart, lend);

}

EXPORT_SYMBOL(sync_blockdev_range);



/*

 * Write out and wait upon all dirty data associated with this

 * device.   Filesystem data as well as the underlying block

include/linux/blkdev.h

+1 −0
Original line number Diff line number Diff line
@@ -1547,6 +1547,7 @@ int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart, 
#ifdef CONFIG_BLOCK

void invalidate_bdev(struct block_device *bdev);

int sync_blockdev(struct block_device *bdev);

int sync_blockdev_range(struct block_device *bdev, loff_t lstart, loff_t lend);

int sync_blockdev_nowait(struct block_device *bdev);

void sync_bdevs(bool wait);

void printk_all_partitions(void);