Re: [PATCH 16/17] block: use iomap for writes to block devices

[Christoph Hellwig]

On Wed, May 24, 2023 at 02:33:13PM +0100, Matthew Wilcox wrote:
> As you can see, do_page_cache_ra() does limit readahead to i_size.
> Is ractl->mapping->host the correct way to find the inode?  I always
> get confused.

As far as I can tell it is the right inode, the indirection through
file->f_mapping ensures it actually points to the backing inode.