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On Sat, 24 Aug 2013 22:15:16 +0800
Drunkard Zhang <gongfan193@xxxxxxxxx> wrote:
> > May be we can enable debug for short time when
> > OPS is not working:
> >
> > # Start debug for 10ms
> > echo 20 > /proc/sys/net/ipv4/vs/debug_level
> > usleep 10000
> > # Stop debug
> > echo 0 > /proc/sys/net/ipv4/vs/debug_level
Just some general notes on debugging.
Debug verbose levels:
- 1 is least verbose
- 12 is most verbose
- 0 disables debugging
Kernel needs to be compiled with CONFIG_IP_VS_DEBUG=y
To get even more detailed debugging. The macro IP_VS_DBG_PKT uses
debug_pr() to print its messages. If the kernel is configured with
dynamic debug (CONFIG_DYNAMIC_DEBUG), you will not see these messages.
To enable these messages, do the following:
mount -t debugfs none /sys/kernel/debug/
cat /sys/kernel/debug/dynamic_debug/control | grep ipvs
echo "func ip_vs_tcpudp_debug_packet_v6 +p" >
/sys/kernel/debug/dynamic_debug/control
echo "func ip_vs_tcpudp_debug_packet_v4 +p" >
/sys/kernel/debug/dynamic_debug/control
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Sr. Network Kernel Developer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer
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