netdev - Re: commit 64ff3b938ec6782e6585a83d5459b98b0c3f6eb8 breaks rlogin

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Message-Id: <20090208.220357.261414983.davem@davemloft.net>
Date:	Sun, 08 Feb 2009 22:03:57 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	jeff.chua.linux@...il.com, rjw@...k.pl,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: commit 64ff3b938ec6782e6585a83d5459b98b0c3f6eb8 breaks rlogin

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Mon, 9 Feb 2009 16:58:48 +1100

> On Fri, Feb 06, 2009 at 07:35:50PM +0800, Jeff Chua wrote:
> >
> > > Did you change the kernel on the other side during these tests?
> > 
> > No. Was hoping that the traces would show where it hang for the good
> > and bad trace.
> 
> Then the problem isn't my patch at all.  My patch only affects
> the side sending the urgent data, according to your straces, rlogin
> is only receiving urgent data, not sending it.  So the patch cannot
> have an affect.

Hmmm... let's figure out exactly what's going on here.

I would expect to see the URG packets from rlogin not rlogind, from
things like hitting Ctrl-C etc.

On the other hand, I can't imagine what the server, rlogind, would be
sending URGs out for.

So I would say that it is more likely to be rlogin sending the
URG packets.
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