On Fri, 2013-04-05 at 09:21 -0400, Rik van Riel wrote: > On 04/05/2013 12:38 AM, Mike Galbraith wrote: > > On Tue, 2013-03-26 at 16:00 -0400, Rik van Riel wrote: > > >> The ipc semaphore code has a nasty RCU locking tangle, with both > >> find_alloc_undo and semtimedop taking the rcu_read_lock(). The > >> code can be cleaned up somewhat by only taking the rcu_read_lock > >> once. > >> > >> There are no other callers to find_alloc_undo. > >> > >> This should also solve the trinity issue reported by Sasha Levin. > > > > I take it this is on top of the patchlet Sasha submitted? > > Indeed, and all the other fixes that got submitted :)
I plugged it into my 64 core rt box and beat on it again, no stalls or any other troubles noted. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
