[dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

[dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

[Daniel, Christopher]

All,

I have the following configuration on my machine

Linux localhost.localdomain 3.12.6 #4 SMP Fri Dec 27 14:26:57 EST 2013 x86_64 x86_64 x86_64 GNU/Linux : Centos


1)      Downloaded the latest version of DPK ( 1.7);


2)      Executing the quick start instructions ( running gcc 4.7.x)



3)      Having an issue with



      # insmod build/kmod/igb_uio.ko

I am getting

insmod: error inserting './build/kmod/igb_uio.ko': -1 Unknown symbol in module

dmesg:
igb_uio: Unknown symbol __fentry__ (err 0)

Please let me know what I'm missing.

Thanks
Chris

Re: [dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

[Jeff Shaw]

On Thu, Jul 10, 2014 at 09:53:20PM +0000, Daniel, Christopher wrote:
> 3)      Having an issue with
>       # insmod build/kmod/igb_uio.ko
> 
> I am getting
> 
> insmod: error inserting './build/kmod/igb_uio.ko': -1 Unknown symbol in module
> 
> dmesg:
> igb_uio: Unknown symbol __fentry__ (err 0)
> 

Did you 'modprobe uio'?

Re: [dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

[Daniel, Christopher]

Yes I did modprobe uio. I can see it listed with lsmod.

[root@localhost dpdk-1.7.0]# lsmod
Module                    Size   Used by
uio                    	   10343 	 0
nfnetlink_queue   11564  	0
nfnetlink_log        9334  		0
nfnetlink               5742  		2 nfnetlink_queue,nfnetlink_log
bluetooth             371110  	0
rfkill                 	20113  		1 bluetooth
nls_utf8              1389  		1


-----Original Message-----
From: Jeff Shaw [mailto:jeffrey.b.shaw@intel.com] 
Sent: Thursday, July 10, 2014 6:09 PM
To: Daniel, Christopher
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

On Thu, Jul 10, 2014 at 09:53:20PM +0000, Daniel, Christopher wrote:
> 3)      Having an issue with
>       # insmod build/kmod/igb_uio.ko
> 
> I am getting
> 
> insmod: error inserting './build/kmod/igb_uio.ko': -1 Unknown symbol in module
> 
> dmesg:
> igb_uio: Unknown symbol __fentry__ (err 0)
> 

Did you 'modprobe uio'?

Re: [dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

[Chris Wright]

* Daniel, Christopher (Chris.Daniel@flukenetworks.com) wrote:
> All,
> 
> I have the following configuration on my machine
> 
> Linux localhost.localdomain 3.12.6 #4 SMP Fri Dec 27 14:26:57 EST 2013 x86_64 x86_64 x86_64 GNU/Linux : Centos
> 
> 
> 1)      Downloaded the latest version of DPK ( 1.7);
> 
> 
> 2)      Executing the quick start instructions ( running gcc 4.7.x)
> 
> 
> 
> 3)      Having an issue with
> 
> 
> 
>       # insmod build/kmod/igb_uio.ko
> 
> I am getting
> 
> insmod: error inserting './build/kmod/igb_uio.ko': -1 Unknown symbol in module
> 
> dmesg:
> igb_uio: Unknown symbol __fentry__ (err 0)

seems like you have built module w/ CONFIG_FTRACE and built kernel
w/out.  did you manually set RTE_KERNELDIR when you built (if so, is it
pointing to the right location?)

thanks,
-chris

Re: [dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

[Daniel, Christopher]

Actually I did not build the kernel. It is unmodified from the original centos download.
I also did not change any build parameters while building the module.
Used all the defaults from the download and executed the commands as in the quick start guide.
Is there something I can change and rebuild the dpk module ?
Thanks for your help

> On Jul 10, 2014, at 6:31 PM, "Chris Wright" <chrisw@redhat.com> wrote:
> 
> * Daniel, Christopher (Chris.Daniel@flukenetworks.com) wrote:
>> All,
>> 
>> I have the following configuration on my machine
>> 
>> Linux localhost.localdomain 3.12.6 #4 SMP Fri Dec 27 14:26:57 EST 2013 x86_64 x86_64 x86_64 GNU/Linux : Centos
>> 
>> 
>> 1)      Downloaded the latest version of DPK ( 1.7);
>> 
>> 
>> 2)      Executing the quick start instructions ( running gcc 4.7.x)
>> 
>> 
>> 
>> 3)      Having an issue with
>> 
>> 
>> 
>>      # insmod build/kmod/igb_uio.ko
>> 
>> I am getting
>> 
>> insmod: error inserting './build/kmod/igb_uio.ko': -1 Unknown symbol in module
>> 
>> dmesg:
>> igb_uio: Unknown symbol __fentry__ (err 0)
> 
> seems like you have built module w/ CONFIG_FTRACE and built kernel
> w/out.  did you manually set RTE_KERNELDIR when you built (if so, is it
> pointing to the right location?)
> 
> thanks,
> -chris

Re: [dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

[Chris Wright]

* Daniel, Christopher (Chris.Daniel@flukenetworks.com) wrote:
> > On Jul 10, 2014, at 6:31 PM, "Chris Wright" <chrisw@redhat.com> wrote:
> > * Daniel, Christopher (Chris.Daniel@flukenetworks.com) wrote:
> >> Linux localhost.localdomain 3.12.6 #4 SMP Fri Dec 27 14:26:57 EST 2013 x86_64 x86_64 x86_64 GNU/Linux : Centos

OK, I expected to see a suffix like 3.12.6.el...(why I assumed you built
your own kernel)

> >> 1)      Downloaded the latest version of DPK ( 1.7);
> >> 2)      Executing the quick start instructions ( running gcc 4.7.x)
> >> 3)      Having an issue with
> >>      # insmod build/kmod/igb_uio.ko
> >> I am getting
> >> insmod: error inserting './build/kmod/igb_uio.ko': -1 Unknown symbol in module
> >> 
> >> dmesg:
> >> igb_uio: Unknown symbol __fentry__ (err 0)
> > 
> > seems like you have built module w/ CONFIG_FTRACE and built kernel
> > w/out.  did you manually set RTE_KERNELDIR when you built (if so, is it
> > pointing to the right location?)
> 
> Actually I did not build the kernel. It is unmodified from the original centos download.
> I also did not change any build parameters while building the module.
> Used all the defaults from the download and executed the commands as in the quick start guide.
> Is there something I can change and rebuild the dpk module ?

Hmm, you could verify a couple things:

$ uname -r
$ grep __fentry__ /proc/kallsyms
$ grep CONFIG_FTRACE /lib/modules/$(uname -r)/build/.config

thanks,
-chris

Re: [dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

[Daniel, Christopher]

Chris,

Here is what I verified...

>> $ uname -r
3.12.6

>> $ grep __fentry__ /proc/kallsyms
Nothing found here.

>> $ grep CONFIG_FTRACE /lib/modules/$(uname -r)/build/.config
CONFIG_FTRACE=y
CONFIG_FTRACE_SYSCALLS=y
CONFIG_FTRACE_MCOUNT_RECORD=y
# CONFIG_FTRACE_STARTUP_TEST is not set



-----Original Message-----
From: Chris Wright [mailto:chrisw@redhat.com] 
Sent: Thursday, July 10, 2014 6:51 PM
To: Daniel, Christopher
Cc: Chris Wright; dev@dpdk.org
Subject: Re: [dpdk-dev] Error while inserting module /build/kmod/igb_uio.ko

* Daniel, Christopher (Chris.Daniel@flukenetworks.com) wrote:
> > On Jul 10, 2014, at 6:31 PM, "Chris Wright" <chrisw@redhat.com> wrote:
> > * Daniel, Christopher (Chris.Daniel@flukenetworks.com) wrote:
> >> Linux localhost.localdomain 3.12.6 #4 SMP Fri Dec 27 14:26:57 EST 
> >> 2013 x86_64 x86_64 x86_64 GNU/Linux : Centos

OK, I expected to see a suffix like 3.12.6.el...(why I assumed you built your own kernel)

> >> 1)      Downloaded the latest version of DPK ( 1.7);
> >> 2)      Executing the quick start instructions ( running gcc 4.7.x)
> >> 3)      Having an issue with
> >>      # insmod build/kmod/igb_uio.ko I am getting
> >> insmod: error inserting './build/kmod/igb_uio.ko': -1 Unknown 
> >> symbol in module
> >> 
> >> dmesg:
> >> igb_uio: Unknown symbol __fentry__ (err 0)
> > 
> > seems like you have built module w/ CONFIG_FTRACE and built kernel 
> > w/out.  did you manually set RTE_KERNELDIR when you built (if so, is 
> > it pointing to the right location?)
> 
> Actually I did not build the kernel. It is unmodified from the original centos download.
> I also did not change any build parameters while building the module.
> Used all the defaults from the download and executed the commands as in the quick start guide.
> Is there something I can change and rebuild the dpk module ?

Hmm, you could verify a couple things:

$ uname -r
$ grep __fentry__ /proc/kallsyms
$ grep CONFIG_FTRACE /lib/modules/$(uname -r)/build/.config

thanks,
-chris