On Tue, Oct 08, 2002 at 01:11:29PM -0700, Andrew Morton wrote:
> Robert Williamson wrote:
> > ...
> > - Fix for "writev01" to check for EINVAL on ( Paul Larson )
> > 2.5.35 and above kernels
> whoa. I've been asleep. The 2.4 kernel _does_ return zero
> if passed a zero segment count.
> So we need to fix 2.5 to do that as well. Sure, the spec
> appears to allow either, but given that, we should preserve
> the 2.4 behaviour.
I agree. Passing zero counts means "no work to do" and passing
that information is never a problem in any function.
The same goes for a segment with zero len (which is a way to
measure user space to kernel driver latency, if the driver
implements writev and readv).
It's only a "performance bug", if that is used in a real
application, no wrong parameters.
-- Science is what we can tell a computer. Art is everything else. --- D.E.Knuth - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to firstname.lastname@example.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Tue Oct 15 2002 - 22:00:31 EST