Re: [PATCH 2/4 v4] kernel/fork.c: avoid division by zero

From: Peter Zijlstra
Date: Mon Feb 23 2015 - 16:10:23 EST

On Mon, Feb 23, 2015 at 09:14:35PM +0100, Heinrich Schuchardt wrote:
> With 32-bit calculus there is no solution which delivers valid results
> for all possible combinations of the parameters.

So I can't help but be bugged by this (my problem I know); calculus is
the mathematics of change; its differential equations and integrals.

What we do here is modular arithmetic on a commutative ring.

Please use calculation as you do here:

> Hence a 64-bit calculation can be used as solution.

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