On 10/21/22 09:32, Stefan Metzmacher wrote:
Hi Pavel,
Experimenting with this stuff lets me wish to have a way to
have a different 'user_data' field for the notif cqe,
maybe based on a IORING_RECVSEND_ flag, it may make my life
easier and would avoid some complexity in userspace...
As I need to handle retry on short writes even with MSG_WAITALL
as EINTR and other errors could cause them.
What do you think?
Any comment on this?
IORING_SEND_NOTIF_USER_DATA could let us use
notif->cqe.user_data = sqe->addr3;
I'd rather not use the last available u64, tbh, that was the
reason for not adding a second user_data in the first place.
As far as I can see io_send_zc_prep has this:
if (unlikely(READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3)))
return -EINVAL;
both are u64...
Hah, true, completely forgot about that one
--
Pavel Begunkov
