Messages in this thread |  | | | Date | Fri, 30 May 2008 20:18:39 +0200 | | From | Ingo Molnar <> | | Subject | Re: [bug] stuck localhost TCP connections, v2.6.26-rc3+ |
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* Ingo Molnar <mingo@elte.hu> wrote:
> after about 50 bootups i got a hung test again: > > titan:~/tip> netstat -nt > Active Internet connections (w/o servers) > Proto Recv-Q Send-Q Local Address Foreign Address > State > tcp 0 0 10.0.1.14:22 10.0.1.16:58062 ESTABLISHED > tcp 0 0 10.0.1.14:22 10.0.1.16:60109 ESTABLISHED > tcp 0 86368 10.0.1.14:43914 10.0.1.16:3632 ESTABLISHED > > and this time with CUBIC_TCP disabled - so that was a red herring.
ah, in retrospect i realized that this test had one flaw: some of the systems i the build cluster already ran a newer kernel and hence were targets for this bug.
so i turned off CONFIG_TCP_CONG_CUBIC on all the testboxes and rebooted the cluster boxes into 2.6.25, and the hung sockets are now gone. (about 150 successful iterations)
i did another change as well: i removed the localhost distcc component. I'll reinstate that now to make sure it's really related to TCP_CONG_CUBIC and not to localhost networking.
Ingo
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