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Re: kern/49065 (ifconfig tun0 ... sequence locks up system)

On 08/04/14 01:30, Mindaugas Rasiukevicius wrote:
The following reply was made to PR kern/49065; it has been noted by GNATS.

From: Mindaugas Rasiukevicius <>
Cc: Frank Kardel <>,,,
Subject: Re: kern/49065 (ifconfig tun0 ... sequence locks up system)
Date: Mon, 4 Aug 2014 00:28:27 +0100

  Frank Kardel <> wrote:
  >  Now mdnsd is stuck at:
  >  db> bt/a dac148e0
  >  trace: pid 786 lid 1 at 0xd9f89b54
  >  0xd9f89b54: netbsd:mi_switch+0xc
  >  0xd9f89b84: netbsd:sleepq_block+0xa4
  >  0xd9f89bbc: netbsd:cv_wait+0x114
  >  0xd9f89be4: netbsd:usbd_transfer+0x1e8
  >  0xd9f89c1c: netbsd:usbd_do_request_flags_pipe+0xd0
  >  0xd9f89c44: netbsd:usbd_do_request+0x38
  >  0xd9f89c74: netbsd:smsc_write_reg+0x60
  >  0xd9f89ca4: netbsd:smsc_ioctl+0x110
  >  0xd9f89d4c: netbsd:if_mcast_op+0x50
  >  0xd9f89d9c: netbsd:in6_addmulti+0x1a8
  >  0xd9f89dc4: netbsd:in6_joingroup+0x44
  >  0xd9f89e4c: netbsd:ip6_ctloutput+0x137c
  >  0xd9f89e74: netbsd:udp6_ctloutput+0x9c
  >  0xd9f89ed4: netbsd:sosetopt+0x6c
  >  0xd9f89f0c: netbsd:sys_setsockopt+0x84
  >  0xd9f89f7c: netbsd:syscall+0x8c
  >  0xd9f89fac: netbsd:swi_handler+0x98
  >  db>
Nick is your friend here. The driver should not really block for a
  long time with softnet_lock held.
With the latest fixes I cannot replicate the issue an more. No idea what i saw last weekend. So to issue is fixed for me.

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