Re: [Qemu-devel] [PATCH] versatile: Push lsi initialization to the end

[Jan Kiszka]

On 2012-10-08 18:28, Paolo Bonzini wrote:
> Il 08/10/2012 18:02, Peter Maydell ha scritto:
>>>> It's not (only) about a missing event for the serial frontend, it's also
>>>> about a spurious open event to the monitor. That generates unwanted
>>>> output during startup.
>> Right, so whatever's sending that event needs not to do so until
>> creation of the machine is complete. Sending events randomly
>> halfway through init is a recipe for problems...
> 
> So we now have proof that using bottom halves outside the block layer
> was a bad idea.  Thanks Jan. :)
> 
> If Stefan goes on with the AioContext idea, we can have separate
> AioContexts for qemu_bh_new on one side and for block devices on the
> other, so that qemu_bh_new bottom halves won't fire just because
> something is calling the block layer.
> 
> In the meanwhile, qemu_char could use a QEMUTimer expiring in the past
> instead of a bottom half.

Sounds "beautiful", waiting to break when we leave like this and start
playing with the timer subsystem ;). But I guess it's best for now. Let
me have a look...

Jan

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