netdev - Re: [PATCH 4/7] flow: delayed deletion of flow cache entries

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Message-ID: <4BB1EF7A.7030407@iki.fi>
Date:	Tue, 30 Mar 2010 15:32:58 +0300
From:	Timo Teräs <timo.teras@....fi>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH 4/7] flow: delayed deletion of flow cache entries

Herbert Xu wrote:
> On Mon, Mar 29, 2010 at 05:12:41PM +0300, Timo Teras wrote:
>> Speed up lookups by freeing flow cache entries later. This is also in
>> preparation to have virtual entry destructor that might do more
>> work.
> 
> So how does this speed up lookups exactly?

If flow cache regeneration or shrinking is triggered in lookup,
it would previously free it in place. Now that is deferred. But
yes, it's more useful after the next patches that call the
virtual destructor. Should have explained this better.

Like said in the general description, patches 4-7 go together
and still have some problem cases. But should show where I'm
trying to go.

I'd be interested hear if the idea of patches 4-7 is good
or we could things somehow better.
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