Re: WARN_ON_ONCE(!new_owner) within wake_futex_pi() triggerede

From: Heiko Carstens
Date: Thu Jan 31 2019 - 15:43:10 EST


On Thu, Jan 31, 2019 at 06:06:53PM +0100, Sebastian Sewior wrote:
> On 2019-01-31 17:52:28 [+0100], Heiko Carstens wrote:
> > ...nevertheless Stefan and I looked through the lovely disassembly of
> > _pthread_mutex_lock_full() to verify if the compiler barriers are
> > actually doing what they are supposed to do. The generated code
> > however does look correct.
> > So, it must be something different.
>
> would it make sense to use one locking function instead all three (lock,
> try-lock, timed) in the test case to figure out if this is related to
> one of the locking function?

Sure, I will give that a try tomorrow.