netdev - Re: TCP slowdown in 2.6.25?

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Message-Id: <1209389586.6904.17.camel@gentoo-jocke.transmode.se>
Date:	Mon, 28 Apr 2008 15:33:06 +0200
From:	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
To:	Netdev <netdev@...r.kernel.org>
Subject: Re: TCP slowdown in 2.6.25?


On Mon, 2008-04-28 at 14:12 +0200, Joakim Tjernlund wrote:
> After upgrading from 2.6.23 to 2.6.25 I am seeing a big slow down on
> our old www server. Stracing shows lots of EAGAIN but i not sure
> these are relevant. I got no idea where to start looking so
> I would appreciate some pointers. Perhaps this is a know issue?
> 
> CPU is a PowerPC, mpc8321, network driver ucc_geth
> 
>  Jocke

Some info:
Even ftp transfers takes forever, but only in one direction: from the
node with kernel 2.6.25 to some other host. Strace show me that
write(2) hangs for long periods before succeeding to transmit 
the data.
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