On Wed, Apr 09, 2014 at 05:55:57AM +0000, WANG Cheng D wrote: > Dear Daniel, > As you know, following your suggestion, I can expose shared memory to > two containers hosted by the same machine, thus the two containers can > exchange data. Now I have a new problem: how does the containers avoid > concurrent accesses to the shared memory? In a native system, this can > be achieved by using semaphore. But I don't know how the two containers > can see the same semaphore. Do I need to design a mechanism to control > the access to the shared memory? Correct, there's no way to share semaphores. Since you hav shared memory though, can you use a POSIX process shared mutex that is allocated in that shared memory block. 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 :| _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
