Re: [Qemu-devel] [RFC PATCH v2 0/4] port network layer onto glib

[liu ping fan]

On Thu, Mar 28, 2013 at 9:40 PM, Stefan Hajnoczi <address@hidden> wrote:
> On Thu, Mar 28, 2013 at 09:42:47AM +0100, Paolo Bonzini wrote:
>> Il 28/03/2013 08:55, Liu Ping Fan ha scritto:
>> >    3rd. block layer's AioContext will block other AioContexts on the same 
>> > thread.
>>
>> I cannot understand this.
>
> The plan is for BlockDriverState to be bound to an AioContext.  That
> means each thread is set up with one AioContext.  BlockDriverStates that
> are used in that thread will first be bound to its AioContext.
>
> It's not very useful to have multiple AioContext in the same thread.
>
But it can be the case that we detach and re-attach the different
device( AioContext) to the same thread.   I think that the design of
io_flush is to sync, but for NetClientState, we need something else.
So if we use AioContext, is it proper to extend readable/writeable
interface for qemu_aio_set_fd_handler()?

Thanks,
Pingfan

> Stefan