On Wed, Apr 29, 2015 at 12:30 PM, Austin S Hemmelgarn <ahferro...@gmail.com> wrote: > On 2015-04-29 14:54, Andy Lutomirski wrote: >> >> On Apr 29, 2015 5:48 AM, "Harald Hoyer" <har...@redhat.com> wrote: >>> >>> >>> * Being in the kernel closes a lot of races which can't be fixed with >>> the current userspace solutions. For example, with kdbus, there is a >>> way a client can disconnect from a bus, but do so only if no further >>> messages present in its queue, which is crucial for implementing >>> race-free "exit-on-idle" services >> >> >> This can be implemented in userspace. >> >> Client to dbus daemon: may I exit now? >> Dbus daemon to client: yes (and no more messages) or no >> > Depending on how this is implemented, there would be a potential issue if a > message arrived for the client after the daemon told it it could exit, but > before it finished shutdown, in which case the message might get lost. >
Then implement it the right way? The client sends some kind of sequence number with its request. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
