If we drop this patch, we will need to introduce 2 deliver func, which
seems not clean and simple.
Then you can probably skip the iov_to_buf() if iov_cnt is one in the
above code?
Seems like a good idea to avoid the extra memcpy, thank you! BTW,
can I do this on top of the series if there's no other comments?
Better squash the changes in this patch or another independent patch
before this patch. (We don't want to break bisection).
so that the first 10 patch can be merged as is. if not, I will send
another
version v12 to fix this.
Post V12 or if you wish, I can fix this myself :)