[PATCH V2 2/9] nvmet: add ZNS support for bdev-ns

[Chaitanya Kulkarni]

On 11/30/20 04:29, Johannes Thumshirn wrote:
> On 30/11/2020 04:32, Chaitanya Kulkarni wrote:
>> +	ret =  __bio_iov_append_get_pages(bio, &from);
> Can't you just use bio_iov_iter_get_pages() here?
>
> It does have a 
>
> if (WARN_ON_ONCE(is_bvec))
> 	return -EINVAL;
>
> in it but I think that can be deleted.
>
That was my initial patch but it adds an extra function call to the

fast patch for NVMeOF. We don't need any of the generic functionality from

bio_iov_iter_get_pages() anyway.


Why add an extra function call overhead in the hot path for each I/O ?