netdev - Re: xfrm_state locking regression...

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Message-ID: <20080923121414.GB29257@gondor.apana.org.au>
Date:	Tue, 23 Sep 2008 20:14:15 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Timo Teräs <timo.teras@....fi>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: xfrm_state locking regression...

On Tue, Sep 23, 2008 at 03:08:08PM +0300, Timo Teräs wrote:
>
> +		list_for_each_entry(walk, &xfrm_state_walks, list) {
> +			if (walk->state == x)
> +				walk->state = next;
> +		}

Just make a new list in xfrm_state that has all the dumpers sitting
on it.  In fact all you need is a hlist, or even just a pointer.

Walking through an unbounded list on the fast path is not good :)

Cheers,
-- 
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