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SubjectRe: Network performance degradation from 2.6.11.12 to 2.6.16.20
From
From: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Date: Tue, 19 Sep 2006 02:00:38 +0400

> * I do not undestand what the hell dhcp needs timestamps for.

I can't even find a reference to SIOCGSTAMP in the
dhcp-2.0pl5 or dhcp3-3.0.3 sources shipped in Ubuntu.

But I will note that tpacket_rcv() expects to always get
valid timestamps in the SKB, it does a:

if (skb->tstamp.off_sec == 0) {
__net_timestamp(skb);
sock_enable_timestamp(sk);
}
so that it can fill in the h->tp_sec and h->tp_usec
fields.
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