Re: [bug] stuck localhost TCP connections, v2.6.26-rc3+

Ingo Molnar
2008-05-26T14:17:46Z

* Ingo Molnar <mingo@elte.hu> wrote:

> i also ran this for 15 minutes:
>
> [root@europe ~]# tcpdump src and dst 10.0.1.15 -n
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
>
> but there was no output at all - i.e. TCP has not attempted to do
> anything to these connections.

... which is not surprising as it traced eth0 ;-) [10.0.1.15 is the IP
of the box and routes back to loopback]

with the proper tcpdump it gave:

[root@europe ~]# tcpdump -i lo
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lo, link-type EN10MB (Ethernet), capture size 96 bytes
16:15:05.260000 IP europe.37198 > europe.distcc: . ack 2022529163 win 257 <nop,nop,timestamp 209526 197526>
16:15:05.260000 IP europe.distcc > europe.37198: . ack 1 win 0 <nop,nop,timestamp 209526 7020>

hm, a window of 257 and zero, is that right?

Ingo