[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()
create ^ title it credit2: init_pcpu doesn't grab runqueue lock before pointing pcpu schedule_lock to it thanks On Fri, Oct 11, 2013 at 1:20 PM, Jan Beulich <JBeulich@xxxxxxxx> wrote: >>>> 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. > > Jan > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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