[PATCH v11 2/9] block: Add copy offload support infrastructure

[Nitesh Shetty]

On 23/05/29 06:55PM, Matthew Wilcox wrote:
>On Mon, May 22, 2023 at 04:11:33PM +0530, Nitesh Shetty wrote:
>> +		token = alloc_page(gfp_mask);
>
>Why is PAGE_SIZE the right size for 'token'?  That seems quite unlikely.
>I could understand it being SECTOR_SIZE or something that's dependent on
>the device, but I cannot fathom it being dependent on the host' page size.

This has nothing to do with block device at this point, merely a place
holder to store information about copy offload such as src sectors, len.
Token will be typecasted by driver to get copy info.
SECTOR_SIZE also should work in this case, will update in next version.