Re: 64 bit netdev stats counter

David S. Miller (davem@redhat.com)
Fri, 12 Jul 2002 15:06:07 -0700 (PDT)


From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: 13 Jul 2002 00:20:53 +0100

gcc will output

increment low 32bit
if zero
increment high

Which means we can rapidly get 2^32 out of sync

True and this equals the "fix" suggested C code involving
two 32-bit counters that the original author posted :-)

So this makes both cases equally wrong.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/