Re: [PATCH] cancel_delayed_work: use del_timer() instead of del_timer_sync()

[Jarek Poplawski <jarkao2@o2.pl>]

On Wed, Apr 25, 2007 at 01:50:34AM +0400, Oleg Nesterov wrote:
> del_timer_sync() buys nothing for cancel_delayed_work(), but it is less
> efficient since it locks the timer unconditionally, and may wait for the
> completion of the delayed_work_timer_fn().

I'm not sure what is the main aim of this patch. It seems this
change cannot do any harm, but anyway it could change a few
things, e.g. with current version of cancel_rearming_delayed_work
some flush_workqueue could be done needlessly, before the work
is queued from timer. It's not a big deal here, but if anybody
did something like this without loop - it could matter.

So, probably a lot of current code should be checked, before
applying and I doubt the gain is worth of this. Maybe, for
safety, make this with new name as an alternative and
deprecate the current version?

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