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Date:	Thu, 11 Jan 2007 22:29:32 +1100
From:	Herbert Xu <>
To:	David Miller <>
Subject: Re: [IPSEC] flow: Cache negative results

On Wed, Jan 10, 2007 at 10:06:05PM -0800, David Miller wrote:
> One thing we could do is force a full flow cache flush when some
> percentage before the generation count would overflow.  Say every
> %80 of the generation ID space?  That gives enough space to ensure
> the flush tasklet runs before the ID really does wrap.

Yes that would be a good solution.  It'd prevent overflows from causing
any damage and is also pretty light weight (just a single comparison
every time the genid changes).

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