Re: [Xen-devel] Xen PVM: Strange lockups when running PostgreSQL load

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 17.10.12 at 15:28, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:
> In our case, certain processes were locking up, and it turned out that
> the kernel was issuing SCHOP_poll hypercalls (same the stack trace on
> your launchpad ticket) on its own spinlock IPI event channel
> (understandable, as its a spinlock), but with the event channel masked,
> so it would never wake up from the poll.

Probably some misunderstanding: The event channel used
here will always be masked, and whether an event channel is
masked doesn't matter for the purposes of polling it.

Jan


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