On Tue, Jan 28, 2014 at 11:13:15AM -0800, Jason Low wrote: > This RFC patch disables preemption between modifying lock->owner and > locking/unlocking the mutex lock. This prevents situations where the owner > can preempt between those 2 operations, which causes optimistic spinners to > be unable to check if lock->owner is not on CPU. As mentioned in the > thread for this v1 patchset, disabling preemption is a cheap operation.
In that same thread it was also said that this wasn't really an issue at all. So what is the justification? The patch is rather hideous. -- 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/
