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New: Network problems with 2.6.23+

Bugme-new Andrew Morton 1 participant 1 message Feb 25, 2008 1 message not in the archive

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A message that is not in the archive (sent off-list or not yet received): [email protected]/

Andrew Morton

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(plese respond via emailed reply-to-all, not via the bugzilla web interface)

Quoted 1 line · On Thu, 21 Feb 2008 18:04:45 -0800 (PST) [email protected] wrote:

http://bugzilla.kernel.org/show_bug.cgi?id=10063

There's more info (including a tcpdump) in bugzilla.

Quoted 57 lines
           Summary: Network problems with 2.6.23+
           Product: Networking
           Version: 2.5
     KernelVersion: 2.6.24.2
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: IPV4
        AssignedTo: [email protected]
        ReportedBy: [email protected]

Latest working kernel version: 2.6.23
Earliest failing kernel version: 2.6.24
Distribution: Gentoo
Hardware Environment:

model name : Dual Core AMD Opteron(tm) Processor 170
stepping : 2
cpu MHz : 2009.144

02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit Ethernet Controller (rev 15) sky2

Working on 2.6.24 (as far as I can see) in :

model name : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping : 9
cpu MHz : 2793.222
01:01.0 Ethernet controller: Intel Corporation 82547GI Gigabit Ethernet Controller

Software Environment: TCP-transfers (FTP,HTTP)
Problem Description:

First I want to apologize that I'm not able to do alot of troubleshooting on this issue cause I don't know where to start exactly.

The problem is that I have, after upgrading to 2.6.24 from 2.6.23, experienced alot of "weird" network problems. For example, FTP-transfers to certain hosts on the Internet stalls after a while. I have one dst-host where this problem appears frequently. On another dst-host it doesn't happen as often. Sometimes the transfers doesn't even start.

First we did alot of faultracing on the transmission but after downgrading the kernel it was apparent that the transmission wasn't the problem.

I did not think about filing this report until i saw,
http://kerneltrap.org/node/15550. So I guess I'm not alone.

I must also add that to some dst-hosts there is no problem at all. So I would guess that there might be something with the mtu,wscale or something between hosts.

Quoted 8 lines

All the other dst-hosts I've tried is running 2.6.23

I will try to test alot of kernel-version to try to ease the troubleshooting.

Steps to reproduce:

Start an FTP-transfer from the box mention above.

I guess it might help if you can tell us the IP address of some of the problematic servers.