Thanks Ben, I want to test how ovs kernel module processes packets and update a corresponding flow entry in flow_table. Any suggestions please?
On Thu, Feb 26, 2015 at 11:30 AM, Ben Pfaff <b...@nicira.com> wrote: > On Wed, Feb 25, 2015 at 04:09:59PM +0500, david jhon wrote: > > In order to debug ovs kernel module in gdb, I have set a breakpoint at > > ovs_dp_process_packet() method in datapath/datapath.c, generating traffic > > with ping command from one mininet host to other, but not able to debug > it > > at all because on running n in gdb, I get "The program is not being run." > > > > I am using the following steps to debug openvswitch kernel module: > > -> gdb vmlinux /proc/kcore > > -> cd /sys/modules/openvswitch/sections/; ls A1; cat .text .data .bss > > -> add-symbol-file /root/ovs/_build-gcc/datapath/linux/openvswitch.ko > > 0xf8819000 \ > > -s .data 0xf8825000 \ > > -s .bss 0xf8825380 > > b datapath/datapath.c:288 > > > > Please guide me how do I make it work. > > I don't think you can debug the kernel that way. > > I know a few kernel programmers. None of them have ever mentioned using > GDB to debug the kernel. I don't think it's commonly done. >
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