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

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

[Andrew Morton]

On Mon, 7 Feb 2011 18:55:29 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=28542
> 
>            Summary: 3c59x.c: Regression since 2.6.36 (incl.), for e. g.,
>                     TCP stalls on receive
>            Product: Drivers
>            Version: 2.5
>     Kernel Version: 2.6.36—2.6.37
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: high
>           Priority: P1
>          Component: Network
>         AssignedTo: drivers_network@kernel-bugs.osdl.org
>         ReportedBy: for.poige+bugzilla.kernel.org@gmail.com
>         Regression: Yes
> 
> 
> Dump of kernel source bz2 download being stalled:
> http://poige.livejournal.com/475372.html#cutid1 (see the bunch of ACKs
> #5555523).
> 
> 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.
> 

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

[Ben Hutchings]

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On Mon, 2011-02-07 at 15:09 -0800, Andrew Morton wrote:
> On Mon, 7 Feb 2011 18:55:29 GMT
> bugzilla-daemon@bugzilla.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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