[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH] sched: fix race between sched_move_domain() and vcpu_wake()

>>> On 11.10.13 at 11:32, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:
> I suppose you scanned the code for other cases like this, and
> there are none?

Actually I did just now, and I think there's a similar issue in
credit2's init_pcpu(): After taking pcpu_schedule_lock(cpu) it
alters schedule_lock and hence effectively drops the locking,
yet continues to do other stuff before in fact releasing it.

What is being done prior to unlocking, however, looks to be
unrelated to the lock being held, and rather independently
(of the effective releasing) wanting &rqd->lock held.


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.