On 02/11/17 12:05 PM, Sebastian Andrzej Siewior wrote:
On 2017-11-02 11:23:16 [-0600], Logan Gunthorpe wrote:Well, you clearly didn't read the article I sent or even what I said. ButI did, I just didn't manage to make the link. The futex example looks like compiler optimisation which should not have happen and would be ideal for READ_ONCE, yes. But this is not the case here and this is what I pointed out.
And you still missed what I said and the entire point of the article.
See 7c34e3180a01 ("sched/completion: Add lock-free checking of the
blocking case")
Sounds questionable. I don't see how that function could be inlined, even then.
Logan
