On Tue, Mar 01, 2016 at 01:00:21PM +0100, Christian Borntraeger wrote:
> On 02/11/2016 04:45 PM, Stefan Hajnoczi wrote:
> > On Tue, Feb 09, 2016 at 07:49:05PM +0300, Denis V. Lunev wrote:
> >> we should call trace_init_backends() before trace_init_file() for
> >> CONFIG_TRACE_SIMPLE There is no difference for other cases.
> >>
> >> This problem was introduced by the commit
> >>     commit 41fc57e44ed64cd4ab5393d83624afd897dabd4f
> >>     Author: Paolo Bonzini <pbonzini@redhat.com>
> >>     Date:   Thu Jan 7 16:55:24 2016 +0300
> >>
> >>     trace: split trace_init_file out of trace_init_backends
> >>
> >> 'make check' was failed as a result if configured with
> >>   --enable-trace-backends=simple
> >>
> >> Spotted by Alex Bennée.
> >>
> >> Signed-off-by: Denis V. Lunev <den@openvz.org>
> >> CC: Alex Bennée <alex.bennee@linaro.org>
> >> CC: Paolo Bonzini <pbonzini@redhat.com>
> >> CC: Stefan Hajnoczi <stefanha@redhat.com>
> >> ---
> >>  vl.c | 7 +++----
> >>  1 file changed, 3 insertions(+), 4 deletions(-)
> > 
> > Thanks, applied to my tracing tree:
> > https://github.com/stefanha/qemu/commits/tracing
> > 
> > Stefan
> 
> When is this scheduled for integration? Without that patch not
> only make check is broken, libvirt will also hang if qemu was 
> build with --enable-trace-backends=simple during capability
> detection.

I am sending a tracing pull request with this patch today.

Stefan