[PATCH v3 1/2] block: add sync_blockdev_range()

* [PATCH v3 1/2] block: add sync_blockdev_range()
@ 2022-04-08  3:07 Yuezhang.Mo
  2022-04-08  5:09 ` Christoph Hellwig
  0 siblings, 1 reply; 5+ messages in thread
From: Yuezhang.Mo @ 2022-04-08  3:07 UTC (permalink / raw)
  To: Namjae Jeon, sj1557.seo
  Cc: linux-kernel, linux-fsdevel, Andy.Wu, Wataru.Aoyama,
	Christoph Hellwig, axboe

[-- Attachment #1: Type: text/plain, Size: 1713 bytes --]

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>
cc: Jens Axboe <axboe@kernel.dk>
---
 block/bdev.c           | 7 +++++++
 include/linux/blkdev.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/block/bdev.c b/block/bdev.c
index 13de871fa816..8b549b071bd6 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -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
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 60d016138997..331cc6918ee9 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -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);
-- 
2.25.1

[-- Attachment #2: v3-0001-block-add-sync_blockdev_range.patch --]
[-- Type: application/octet-stream, Size: 1668 bytes --]

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>
cc: Jens Axboe <axboe@kernel.dk>
---
 block/bdev.c           | 7 +++++++
 include/linux/blkdev.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/block/bdev.c b/block/bdev.c
index 13de871fa816..8b549b071bd6 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -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
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 60d016138997..331cc6918ee9 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -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);
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 5+ messages in thread