On 2016/2/4 3:24, Davidlohr Bueso wrote: > On Wed, 03 Feb 2016, Ding Tianhong wrote: > >> Agree, but this patch is going to help the waiter in the wait list to get >> the lock, your scene probability looks more >> too low and I don't think it is a problem. > > Sure, I was in fact implying its not the end of the world, > although it will be interesting to see the impact on different > (non pathological) workloads, even if it only affects a single > waiter. Also, technically this issue can also affect rwsems if > only using writers, but that's obviously pretty idiotic, so I > wouldn't worry about it. > > Thanks, > Davidlohr >
Hi Davidlohr, Peter: According Davidlohr's suggestion, I use several VM to test Peter's patch, and sadly I found one VM still happen Hung Task for this problem, so I think we still need to think more about this solution. Thanks. Ding > . >
