03.02.2022 19:30, Hanna Reitz wrote:
Put an NBD block device into an I/O thread, and then read data from it, hoping that the NBD connection will yield during that read. When it does, the coroutine must be reentered in the block device's I/O thread, which will only happen if the NBD block driver attaches the connection's QIOChannel to the new AioContext. It did not do that after 4ddb5d2fde ("block/nbd: drop connection_co") and prior to "block/nbd: Move s->ioc on AioContext change", which would cause an assertion failure.To improve our chances of yielding, the NBD server is throttled to reading 64 kB/s, and the NBD client reads 128 kB, so it should yield at some point. Signed-off-by: Hanna Reitz<hre...@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> -- Best regards, Vladimir
