From: "Anatoly Sivov" <mm05@mail.ru>
To: "Eric Dumazet" <eric.dumazet@gmail.com>
Cc: netdev@vger.kernel.org
Subject: Re: why does skb->tstamp use getnstimeofday?
Date: Sun, 15 Jan 2012 23:55:23 +0400 [thread overview]
Message-ID: <op.v745mll4fzo5me@stalin> (raw)
In-Reply-To: <1326653813.5287.84.camel@edumazet-laptop>
> 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".
next prev parent reply other threads:[~2012-01-15 19:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-15 15:11 why does skb->tstamp use getnstimeofday? Anatoly Sivov
2012-01-15 16:42 ` Eric Dumazet
2012-01-15 17:55 ` Anatoly Sivov
2012-01-15 18:00 ` Anatoly Sivov
2012-01-15 18:56 ` Eric Dumazet
2012-01-15 19:55 ` Anatoly Sivov [this message]
2012-01-16 22:05 ` Rick Jones
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