linux-kernel - Re: [NETFILTER] early

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Date:	Wed, 27 Jun 2007 14:51:47 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Vasily Averin <vvs@...ru>
CC:	netfilter-devel@...ts.netfilter.org, rusty@...tcorp.com.au,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Eric Dumazet <dada1@...mosbay.com>,
	Jan Engelhardt <jengelh@...putergmbh.de>,
	"David S. Miller" <davem@...emloft.net>, devel@...nvz.org
Subject: Re: [NETFILTER] early_drop() imrovement (v4)

Vasily Averin wrote:
> Patrick McHardy wrote:
> 
>>+	for (i = 0; i < NF_CT_EVICTION_RANGE; i++) {
>>+		hlist_for_each_entry(h, n, &nf_conntrack_hash[hash], hnode) {
>>+			tmp = nf_ct_tuplehash_to_ctrack(h);
>>+			if (!test_bit(IPS_ASSURED_BIT, &tmp->status))
>>+				ct = tmp;
>>+		}
>>+		if (ct) {
>>+			atomic_inc(&ct->ct_general.use);
>>+			break;
>>+		}
>>+		hash = (hash + 1) % nf_conntrack_htable_size;
> 
> 
> it is incorrect,
> We should count the number of checked _conntracks_, but you count the number of
> hash buckets. I.e "i" should be incremented/checked inside the nested loop.


I misunderstood your patch then. This one should be better.

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