netdev - Re: [PATCH net-next] tcp: introduce TCPSpuriousRtxHostQueues SNMP counter

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130418181949.GA10776@virgo.local>
Date:	Thu, 18 Apr 2013 20:19:50 +0200
From:	Hagen Paul Pfeifer <hagen@...u.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Stephen Hemminger <stephen@...workplumber.org>,
	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Yuchung Cheng <ycheng@...gle.com>,
	Neal Cardwell <ncardwell@...gle.com>,
	Tom Herbert <therbert@...gle.com>,
	Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH net-next] tcp: introduce TCPSpuriousRtxHostQueues SNMP
 counter

* Eric Dumazet | 2013-04-18 11:06:21 [-0700]:

>On Thu, 2013-04-18 at 10:45 -0700, Stephen Hemminger wrote:
>> On Thu, 18 Apr 2013 09:52:51 -0700
>> Eric Dumazet <eric.dumazet@...il.com> wrote:
>> 
>> > From: Eric Dumazet <edumazet@...gle.com>
>> > 
>> > Host queues (Qdisc + NIC) can hold packets so long that TCP can
>> > eventually retransmit a packet before the first transmit even left
>> > the host.

Just out of curiosity: do you see effects of commit 9ad7c049 (initRTO from
3secs to 1sec) and a long standing queue? (with no path metric, rtt in
particular)

Hagen
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html