Re: [Qemu-devel] [PATCH] main: force enabling of I/O thread

[Peter Maydell]

On 22 August 2011 14:24, Anthony Liguori <address@hidden> wrote:
> Enabling the I/O thread by default seems like an important part of declaring
> 1.0.  Besides allowing true SMP support with KVM, the I/O thread means that 
> the
> TCG VCPU doesn't have to multiplex itself with the I/O dispatch routines which
> currently requires a (racey) signal based alarm system.

Even with iothread it's still signal based (and still racy) -- the only way
to get a thread currently executing TCG code to stop doing so is to send it
a signal.

-- PMM