Re: [PATCH] [6/6] kfifo: Document everywhere that size has to bepower of two

From: Andi Kleen
Date: Sun Dec 27 2009 - 18:35:29 EST


On Sun, Dec 27, 2009 at 02:14:38PM -0800, Dmitry Torokhov wrote:
> On Sun, Dec 27, 2009 at 10:50:32PM +0100, Stefani Seibold wrote:
> > Am Sonntag, den 27.12.2009, 22:03 +0100 schrieb Andi Kleen:
> > > On my first try using them I missed that the fifos need to
> > > be power of two, resulting in a runtime bug. Document that requirement
> > > everywhere (and fix one grammar bug)
> > >
> > > Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
> > >
> >
> > Acked: Stefani Seibold <Stefani@xxxxxxxxxxx>
> >
>
> Now, does it really _have_ to be this way? For record-oriented
> FIFO's it is customary to be 2*pow(n)*sizeof(rec) which is rarely
> 2*pow(m).

Yes I agree, but the kfifos are not fully record oriented unfortunately.

-Andi
--
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
--
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/