Re: [interesting] smattering of possible memory ordering bugs
From: Benjamin Herrenschmidt
Date: Fri Oct 26 2007 - 00:33:02 EST
On Fri, 2007-10-26 at 13:47 +1000, Nick Piggin wrote:
> I don't think the previous code was wrong... it's not a locked section
> > and we don't care about ordering previous stores. It's an
> allocation, it
> > should be fine. In general, bitmap allocators should be allright.
>
> Well if it is just allocating an arbitrary _number_ out of a bitmap
> and nothing else (eg. like the pid allocator), then you don't need
> barriers.
Yup, that's what it does.
Cheers,
Ben.
-
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/