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xen-devel
Re: [Xen-devel] why xenstore-* hangs if xenstored is not started
On 22/06/10 09:06, Keir Fraser wrote:
On 22/06/2010 08:56, "Vincent Hanquez"<Vincent.Hanquez@xxxxxxxxxxxxx>
wrote:
On 22/06/10 08:45, Keir Fraser wrote:
Does the xenstore driver in the dom0 kernel put the process into
uninterruptible sleep? The 2.6.18 kernel simply returns -ENODEV in this case
I think. So perhaps pv_ops has different and inferior behaviour.
the behavior was the same in 2.6.18.
Ah, I just see 'if (!is_xenstored_ready()) return -ENODEV' in 2.6.18's
xenbus_dev.c. I assumed that would have an effect on this case.
hm, maybe it does afterall, and I'm confuse this with a more general
case; the D state would happens if xenstored doesn't want to reply or is
dead. This behavior has been there as long as I can remember.
I'm pretty sure though that a while ago (relatively old XenServer
kernel) starting a xenstore-* without starting xenstored would make it
stuck until xenstored start.
--
Vincent
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