Re: [ANNOUNCE] Linux Test Project October Release Available

From: Ingo Oeser (
Date: Wed Oct 09 2002 - 06:39:01 EST

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.


Ingo Oeser

Science is what we can tell a computer. Art is everything else. --- D.E.Knuth
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