netdev - Re: [PATCH] Rate should be u64 to avoid integer overflow at high speeds (>= ~35Gbit)

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Message-ID: <5140B006.500@genband.com>
Date:	Wed, 13 Mar 2013 10:57:42 -0600
From:	Chris Friesen <chris.friesen@...band.com>
To:	Stephen Hemminger <stephen@...workplumber.org>
CC:	Bill Fink <billfink@...dspring.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Thomas Graf <tgraf@...g.ch>, Vimal <j.vimal@...il.com>,
	netdev@...r.kernel.org, shemminger <shemminger@...tta.com>
Subject: Re: [PATCH] Rate should be u64 to avoid integer overflow at high
 speeds (>= ~35Gbit)

On 03/13/2013 09:34 AM, Stephen Hemminger wrote:

> As others have said the multiplier shift approach is a not a workable
> solution because it is likely to cause too many compatibility surprises.
> Older kernels would ignore the multiplier and therefore not give the users
> the effective rate they wanted.

How is that any different than ignoring the 64-bit value and not giving 
the effective rate they wanted?

Chris
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