Re: [Qemu-block] [PATCH] nbd-client: avoid spurious qio_channel_yield() re-entry

[Paolo Bonzini]

On 22/08/2017 14:51, Stefan Hajnoczi wrote:
> This should fix the issue that Dave is seeing but I'm concerned that
> there are more problems in nbd-client.c.  We don't have good
> abstractions for writing coroutine socket I/O code.  Something like Go's
> channels would avoid manual low-level coroutine calls.  There is
> currently no way to cancel qio_channel_yield() so requests doing I/O may
> remain in-flight indefinitely and nbd-client.c doesn't join them...

The idea was that shutdown(2) would force them to reenter...

Paolo