Re: Is module refcounting racy?

From: Rusty Russell
Date: Mon Mar 29 2010 - 05:13:06 EST


On Thu, 18 Mar 2010 09:25:34 pm Nick Piggin wrote:
> Hey,
>
> I've been looking at weird and wonderful ways to do scalable refcounting,
> for the vfs...
>
> Sadly, module refcounting doesn't fit my bill. But as far as I could see,
> it is racy.

Other than for advisory purposes, the refcount is only checked against zero
under stop_machine. For exactly this reason.

Hope that helps,
Rusty.
--
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/