linux-kernel - Re: stuck tcp connections 2.6.26-rc7

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Message-Id: <20080622205927.301501e7.akpm@linux-foundation.org>
Date:	Sun, 22 Jun 2008 20:59:27 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Justin Mattock" <justinmattock@...il.com>
Cc:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org
Subject: Re: stuck tcp connections 2.6.26-rc7

On Sun, 22 Jun 2008 18:09:16 +0000 "Justin Mattock" <justinmattock@...il.com> wrote:

> Hello; I too am experiencing internet connectivity problems, for  a
> while I thought
> It was due to low bandwidth(or being ddos attacked) but yesterday I
> noticed with watch netstat -ntu
> send-Q was stuck on a number; the connection would not go to TIME_WAIT
> resulting in music to pause, and t.v. to freeze.
> In my experiences running xmms streaming music is fine, no problems,
> but as soon as
> you watch something with flash player the stream start's getting
> really bad. In the past with older kernel's
> I usually can watch t.v.(with flash) and stream music at the same time
> without any trouble.
> lately I've been Running the kernel in No forced Preemption with a
> time frequency at 100. having the kernel set in this mode really shows
> the connection problems, but if I change the preemption to another,
> and bump up the timer frequency the poor internet connection is not as
> bad(or stuck tcp) but still prevalent. more pops in the music, and
> sudden internet loss for around five seconds, then goes back
> So from over here streaming music has no problems from what I can see,
> but as soon as I watch media, it becomes a mess.

(cc netdev)
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