Re: [PATCH/RFC] wait_for_completion_timeout() considered harmful.

From: Peter Zijlstra
Date: Tue Nov 19 2013 - 07:23:41 EST


On Tue, Nov 19, 2013 at 07:58:51PM +1100, NeilBrown wrote:
> /*
> * TODO: Make sure that we wait at least required delay but why we
> * have to extend it one tick more?
> */
> schedule_timeout_interruptible(msecs_to_jiffies(delay) + 2);

What makes me sad is that clearly people knew stuff was broken but
somehow it never got properly fixed.

Yes, changing something like this is risky, but I prefer to fix the
implementation to the sane and documented behaviour and fix up whatever
fallout that generates. The end result is saner code in general and less
new bugs.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/