>>> On 3/19/2015 at 12:09 PM, Anthony PERARD <anthony.per...@citrix.com> wrote: > On Wed, Mar 18, 2015 at 04:12:26PM +0000, Ian Campbell wrote: >> My second concern here is with the use of /var/run/xen/qmp-libxl-%i from >> outside of libxl. I can't remember if qemu is safe against multiple >> users of the socket. ISTR asking Anthony this before, but I don't recall >> the answer, sorry :-( > > Last time I checked, only one client at a time can connect to the socket. > If a second user want to connect to the socket, it will be blocked until > the first one disconnect.
This seems correct based on some of my testing. In rare cases (perhaps not so rare for VMs under heavy I/O load), reading the socket to get the stats times out and so xentop will report '0' for the read/write stats until the next read attempt that succeeds. It looks as if we do need a second socket to qemu. I will include that in the next patch version. - Charles _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
