[RFC,5/8] block/bdev: enable large folio support for large logical block sizes

Commit Message

Luis Chamberlain Nov. 13, 2024, 9:47 a.m. UTC

From: Hannes Reinecke <[e-mail]>

Call mapping_set_folio_min_order() when modifying the logical block
size to ensure folios are allocated with the correct size.

Signed-off-by: Hannes Reinecke <[e-mail]>
---
 block/bdev.c | 3 +++
 1 file changed, 3 insertions(+)

Patch

diff --git a/block/bdev.c b/block/bdev.c
index 738e3c8457e7..167d82b46781 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -148,6 +148,8 @@  static void set_init_blocksize(struct block_device *bdev)
 		bsize <<= 1;
 	}
 	BD_INODE(bdev)->i_blkbits = blksize_bits(bsize);
+	mapping_set_folio_min_order(BD_INODE(bdev)->i_mapping,
+				    get_order(bsize));
 }
 
 int set_blocksize(struct file *file, int size)
@@ -170,6 +172,7 @@  int set_blocksize(struct file *file, int size)
 	if (inode->i_blkbits != blksize_bits(size)) {
 		sync_blockdev(bdev);
 		inode->i_blkbits = blksize_bits(size);
+		mapping_set_folio_min_order(inode->i_mapping, get_order(size));
 		kill_bdev(bdev);
 	}
 	return 0;