On Mon, 25 Nov 2013 10:53:23 +0100 Peter Zijlstra <[email protected]> wrote:
> On Mon, Nov 25, 2013 at 10:35:22AM +1100, NeilBrown wrote: > > Ingo/Peter: is it considered OK to call wake_up while holding a spinlock? > > Yes, very much so. Doing a wakeup isn't _that_ expensive. Oh good. Thanks. > > > Could "sleeping spinlocks" affect this at all? (some sample stack traces are > > below). > > Not entirely sure, are you referencing to -rt where me make spinlock_t > pi-mutexes? I'm not sure either. Just stabbing in the dark really. The stack trace in the previous email seemed to suggest that a process was blocking inside a wake_up call, but it wasn't at all conclusive. And I've seen a few wake_ups in other stack traces which seem to be connected with other deadlock. Probably some sort of co-incidence. Thanks, NeilBrown
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