netdev - Re: [Bugme-new] [Bug 28542] New: 3c59x.c: Regression since 2.6.36 (incl.), for e. g., TCP stalls on receive

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Date:	Tue, 08 Feb 2011 00:39:10 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	for.poige+bugzilla.kernel.org@...il.com
Cc:	netdev@...r.kernel.org, bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org,
	Jan Beulich <jbeulich@...ell.com>,
	Neil Horman <nhorman@...driver.com>,
	Steffen Klassert <klassert@...hematik.tu-chemnitz.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Bugme-new] [Bug 28542] New: 3c59x.c: Regression since 2.6.36
 (incl.), for e. g., TCP stalls on receive

On Mon, 2011-02-07 at 15:09 -0800, Andrew Morton wrote:
> On Mon, 7 Feb 2011 18:55:29 GMT
> bugzilla-daemon@...zilla.kernel.org wrote:
[...]
> > Dump of kernel source bz2 download being stalled:
> > http://poige.livejournal.com/475372.html#cutid1 (see the bunch of ACKs
> > #5555523).

That's not a stall, that's selective-ACKing (see the ranges listed on
the right of each ACK line).

> > As a workaround I've just replaced drivers/net/3c59x.c with its former
> > (2.6.35.11) version, the connectivity problems are gone now.

This could just be a coincidence.  But it could be that packet loss is
now more likely for some reason.  Does the rx_fifo_errors statistic
increase quickly with the later version of the driver?  (This seems to
be the only receive error type reported.)

Ben.

-- 
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

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