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block: add sync_blockdev_range()

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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: Yuezhang Mo <Yuezhang.Mo@sony.com>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Yuezhang Mo 2022-04-12 12:23:10 +09:00 committed by Namjae Jeon
parent 9b002894b4
commit 97d6fb1b48
2 changed files with 8 additions and 0 deletions
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7
block/bdev.c
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@ -200,6 +200,13 @@ int sync_blockdev(struct block_device *bdev)
} }
EXPORT_SYMBOL(sync_blockdev); 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 * Write out and wait upon all dirty data associated with this
* device. Filesystem data as well as the underlying block * device. Filesystem data as well as the underlying block

1
include/linux/blkdev.h
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@ -1547,6 +1547,7 @@ int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
#ifdef CONFIG_BLOCK #ifdef CONFIG_BLOCK
void invalidate_bdev(struct block_device *bdev); void invalidate_bdev(struct block_device *bdev);
int sync_blockdev(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); int sync_blockdev_nowait(struct block_device *bdev);
void sync_bdevs(bool wait); void sync_bdevs(bool wait);
void printk_all_partitions(void); void printk_all_partitions(void);