Re: [f2fs-dev] [PATCH 5/6] f2fs: implement iomap operations

[Chao Yu]

On 2021/12/2 12:15, Eric Biggers wrote:
> On Thu, Dec 02, 2021 at 11:10:41AM +0800, Chao Yu wrote:
> > Why not relocating this check before f2fs_map_blocks()?

Wait, it supports DIO in multi-device image after commit 	71f2c8206202 
("f2fs: multidevice: support direct IO"), how about
checking with f2fs_allow_multi_device_dio()?

Thanks,

> > Thanks,
> >
> > > +		iomap->bdev = inode->i_sb->s_bdev;
>
> Are you talking about the check for !f2fs_is_multi_device()?  It could go in
> either location, but I think it makes the most sense to have it right before the
> line that uses 'inode->i_sb->s_bdev', since that is the place which makes the
> assumption that the filesystem has only one block device.
>
> - Eric