Thanks a lot guys for your support.
I have tried the patch by Yong Wang, stop and start functions are
working fine with out any crash.
I have noticed that tx/rx stats are being reset to 0. I am not sure if
this is valid behavior as we do not reset stats to 0 when we do
ifconfig down and ifconfig up.
Thanks
Navakanth
On Mon, Oct 13, 2014 at 11:42 PM, Patel, Rashmin N
wrote:
> Waterman/Navakanth, we've got some patches posted for the same by Yong Wang
> at VMware. I haven't got the chance to look at it but if you can validate it,
> it'd be great.
>
> Thanks,
> Rashmin
>
> -Original Message-
> From: Navakanth M [mailto:navakanthdev at gmail.com]
> Sent: Sunday, October 12, 2014 8:07 PM
> To: Patel, Rashmin N; Cao, Waterman
> Cc: stephen at networkplumber.org; dev at dpdk.org; Jiajia, SunX
> Subject: Re: vmxnet3 pmd dev restart
>
> Hi Rashmin
>
> I have tried the memset change but still I am facing the problem which I
> pointed out earlier. After restart, packets are not being received in
> vmxnet3_recv_pkts().
> I have also observed PANIC in vmxnet3_tq_tx_complete() after couple of stop
> and start operations.
>
> PANIC in vmxnet3_tq_tx_complete():
> EOP desc does not point to a valid mbuf15:
> [/lib64/libc.so.6(clone+0x6d) [0x7fd60354c52d]]
> 1: [/mswitch/bin/sos.shumway.elf(rte_dump_stack+0x23) [0x463313]]
> 2: [/mswitch/bin/sos.shumway.elf(__rte_panic+0xc1) [0x447ae8]]
> 3: [/mswitch/bin/sos.shumway.elf(vmxnet3_xmit_pkts+0x382) [0x4f4f22]]
>
> Thanks
> Navakanth
>
> On Fri, Oct 10, 2014 at 8:39 AM, Cao, Waterman
> wrote:
>> Hi Rashmin,
>>
>> We found similar issue when we start/stop vmnet dev several time. (>
>> 3 times) It happens kernel panic, and sometimes kernel will occur core dump.
>> Let me know if you want to submit patch to fix it.
>>
>> Thanks
>> Waterman
>>
>> -Original Message-
>>>From: Patel, Rashmin N
>>>Sent: Friday, October 10, 2014 6:07 AM
>>>To: Navakanth M; stephen at networkplumber.org; Cao, Waterman
>>>Cc: dev at dpdk.org
>>>Subject: RE: vmxnet3 pmd dev restart
>>>
>>>I just quickly looked into the code and instead of releasing memory or
>>>simply set it to NULL (patch:
>>> http://thread.gmane.org/gmane.comp.networking.dpdk.devel/4683), you can
>>> zero it out and it should work perfectly, you can give it a quick try.
>>>
>>>//rte_free(ring->buf_info);
>>>memset(ring->buf_info, 0x0, ring->size*sizeof(vmxnet3_buf_info_t));
>>>
>>>This will not free the memory from heap but just wipe it out to 0x0,
>>>provided that we freed all the mbuf(s) pointed by each buf_info->m pointers.
>>>Hence you won't need to reallocate it when you start device after this stop.
>>>
>>>Thanks,
>>>Rashmin
>>>
>>>-Original Message-
>>>From: Navakanth M [mailto:navakanthdev at gmail.com]
>>>Sent: Wednesday, October 08, 2014 10:11 PM
>>>To: stephen at networkplumber.org; Patel, Rashmin N; Cao, Waterman
>>>Cc: dev at dpdk.org
>>>Subject: Re: vmxnet3 pmd dev restart
>>>
>>>I had tried with Stephen's patch but after stop is done and when we
>>>call start it crashed at vmxnet3_dev_start()->
>>>vmxnet3_dev_rxtx_init()->vmxnet3_post_rx_bufs() as buf_info is freed
>>>and is not allocated again. buf_info is allocated in
>>>vmxnet3_dev_rx_queue_setup() which would be called once at the
>>>initialization only.
>>>I also tried not freeing buf_info in stop but then i see different
>>>issue after start, packets are not received due to check while
>>>(rcd->gen == rxq->comp_ring.gen) { in vmxnet3_recv_pkts()
>>>
>>>Waterman, Have you got chance to test stop and start of vmnet dev if so did
>>>you notice any issue similar to this?
>>>
>>>Thanks
>>>Navakanth
>>>
>>>On Thu, Oct 9, 2014 at 12:46 AM, Patel, Rashmin N >>intel.com> wrote:
Yes I had a local copy working with couple of lines fix. But someone else,
I think Stephen added a fix patch for the same, and I assume if it's been
merged, should be working, so did not follow up later.
I don't have a VMware setup handy at moment but I think Waterman would
have more information about testing that patch if he has found any issue
with it.
Thanks,
Rashmin
-Original Message-
From: Navakanth M [mailto:navakanthdev at gmail.com]
Sent: Wednesday, October 08, 2014 4:14 AM
To: dev at dpdk.org; Patel, Rashmin N
Subject: Re: vmxnet3 pmd dev restart
Hi Rashmin
I have come across your reply in following post that you have worked on
this problem and would submit the patch for it.
Can you please share information on the changes you worked on or patch log
if you had submitted any for it?
http://thread.gmane.org/gmane.comp.networking.dpdk.devel/4683
Thanks
Navakanth
On Tue, Sep 30, 2014 at 1:44 PM, Navakanth M
wrote:
> Hi
>
> I am using DPDKv1.7.0 running on Vmware Esxi 5.1 and am trying to
> reset the port which uses pmd_vmnet3 library functions from below
> function calls.
