Subject: Re: '... RPC: Unable to send; errno = No buffer space available' in -current
To: Manuel Bouyer <bouyer@antioche.eu.org>
From: Markus W Kilbinger <mk@kilbi.de>
List: current-users
Date: 01/11/2007 15:58:27 
>>>>> "Manuel" == Manuel Bouyer <bouyer@antioche.eu.org> writes:

    Manuel> You may run out of space in the ip or interface queue.
    Manuel> What does ifconfig says about wm0 when it's in this state
    Manuel> ?

it says:

  # ifconfig wm0
  wm0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
          capabilities=2bf80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx,TCP6CSUM_Tx,UDP6CSUM_Tx>
          enabled=2bf80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx,TCP6CSUM_Tx,UDP6CSUM_Tx>
          address: 00:07:e9:0e:67:c7
          media: Ethernet autoselect (100baseTX full-duplex)
          status: active
          inet 10.31.2.13 netmask 0xffffff00 broadcast 10.31.2.255
          inet6 fe80::207:e9ff:fe0e:67c7%wm0 prefixlen 64 scopeid 0x1
          inet6 2002:8682:b51:2:207:e9ff:fe0e:67c7 prefixlen 64

But simply:

  # ifconfig wm0 down
  Jan 11 14:32:16 radix routed[293]: interface wm0 to 10.31.2.13 turned off
  # ifconfig wm0 up
  Jan 11 14:32:22 radix routed[293]: interface wm0 to 10.31.2.13 restored

makes it work again.

  # ping -n 10.31.2.1
  PING 10.31.2.1 (10.31.2.1): 56 data bytes
  64 bytes from 10.31.2.1: icmp_seq=0 ttl=255 time=0.331 ms
  64 bytes from 10.31.2.1: icmp_seq=1 ttl=255 time=0.515 ms

-> So, how to find out what is 'blocking' the interface' queue?

Markus.