Subject: Re: why does skb->tstamp use getnstimeofday?

From: "Anatoly Sivov" <[email-masked]>
Date: Sun, 15 Jan 2012 23:55:23 +0400

> TCP stack doesnt use skb->tstamp/jtime_t, for example, but jiffies.
Some CA engines asks for RTT calculation with skb->tstamp.
They state about it by setting TCP_CONG_RTT_STAMP flag in their struct  
tcp_congestion_ops instances.

> For what kind of application or protocol do you feel there could be a
> problem ?
I don't insist on problems are here, just want to mark that there could be  
a problem with these CA engines
in the case of "big ntp adjustment".