On Thu, Aug 24, 2023 at 02:26:42PM -0400, Stefan Hajnoczi wrote: > I've done most of the audit necessary to understand which AioContext is > used where. The call graph is large because qio_channel_yield() is used > internally by qio_channel_readv_full_all_eof(), > qio_channel_writev_full_all(), and their variants. They would all need > a new AioContext argument.
Argh, I forgot about that usage. > I think it's not worth passing AioContext explicitly everywhere since > this involves a lot of code changes and more verbosity to achieve what > we already have. Yeah, I agree with you. > > However, If you think the QIOChannel API should pass AioContext > explicitly then I'll go ahead and make the changes. > > Here is what I've explored so far: > > qio_channel_readv_full_all_eof > mpqemu_read - should be doable > qio_channel_readv_all_eof > qio_channel_read_all_eof > multifd_recv_thread - NULL non-coroutine > vu_message_read - coroutine AioContext > qio_channel_readv_full_all > hw/virtio/vhost-user.c:backend_read() - NULL non-coroutine > qio_channel_readv_all > nbd_co_receive_offset_data_payload - coroutine AioContext > nbd_co_do_receive_one_chunk - coroutine AioContext > qio_channel_read_all > hw/virtio/vhost-user.c:backend_read() - NULL non-coroutine > tpm_emulator_unix_tx_bufs - NULL non-coroutine > nbd_read - ? > zlib_recv_pages - NULL non-coroutine > zstd_recv_pages - NULL non-coroutine > multifd_initial_recv_packet - NULL non-coroutine > nbd_opt_read - iohandler > pr_manager_helper_read - NULL non-coroutine > prh_read_request - coroutine AioContext > prh_co_entry - coroutine AioContext > char_socket_ping_pong - NULL non-coroutine > nocomp_recv_pages - NULL non-coroutine > test_io_thread_reader - NULL non-coroutine > qio_channel_writev_full_all > mpqemu_msg_send - should be doable > qio_channel_writev_all > nbd_co_send_request - coroutine AioContext > hw/virtio/vhost-user.c:backend_read() - NULL non-coroutine > qio_channel_write_all > tpm_emulator_unix_tx_bufs - NULL non-coroutine > multifd_send_initial_packet - NULL non-coroutine > multifd_send_thread - NULL non-coroutine > nbd_write - ? > prh_write_response - coroutine AioContext > prh_co_entry - coroutine AioContext > char_socket_ping_pong - NULL non-coroutine > ppm_save - iohandler > qemu_fflush - ? > nbd_negotiate_send_meta_context - iohandler > nbd/server.c:nbd_co_send_iov - cooroutine AioContext > test_io_thread_writer - NULL non-coroutine > multifd_send_thread - NULL non-coroutine > qemu_fill_buffer - ? > > What do you think? > > Stefan With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
