Re: [Qemu-devel] errno 13, fopen qemu trace file.

["Daniel P. Berrange" <berrange@redhat.com>]

On Thu, Aug 18, 2016 at 01:31:19PM +0000, Nir Levy wrote:
> Daniel, Thanks for your response.
> 
> But I have succeeded using simpletrace when building libvirt from source file into some/other/dir/install

I can only assume you built libvirt so that qemu runs as root,
instead of an unprivileged user account, and/or have not enabled
selinux for libvirt.

> 
> I am using Fedora22 which does not support lttng.
> at the mather of fact I have installed lttng before and build the kernel modules (2.6.0) still no trace generated.
> Michael Jeanson is working for supplying modules (2.8.0) for the next fedora (25)
> fedora 23 and 24 do support systemtap but not over 22 on my kernel 4.2.8 (which we stick to in Asocs due to known performance degradation in later releases)

systemtap is supported in all Fedora releases - if there's any
problems do file bugs against it, as its expected to work as
it is the supported tracing mechanism for Fedora with qemu and
libvirt.


Regards,
Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|