Re: [Qemu-devel] [PATCH v2 2/2] QEMUBH: make AioContext's bh re-entrant

[Stefan Hajnoczi]

On Tue, Jun 18, 2013 at 10:19:40AM +0800, liu ping fan wrote:
> On Mon, Jun 17, 2013 at 11:28 PM, Stefan Hajnoczi <address@hidden> wrote:
> > On Sun, Jun 16, 2013 at 07:21:21PM +0800, Liu Ping Fan wrote:
> > Why lock bh_lock before assigning bh->next?  Could you lock the mutex
> > here and then drop the smp_wmb() since the pthread function already does
> > that?
> >
> As Paolo's explain, it will open race gap for writers.

Right, thanks!