Re: Kernel Panic in VMXNET3 Driver

[deloptes]

Mini Trader wrote:

> More information.  I found a post here:
> 
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1650635
> 
> They mention LRO so I disabled it.  I cannot reproduce if LRO is disabled.
> 
> On Mon, Jul 3, 2017 at 5:59 PM, Mini Trader <miniflowtra...@gmail.com>
> wrote:
> 
>> Looks to be the same.
>>
>> On Mon, Jul 3, 2017 at 5:48 PM, deloptes <delop...@gmail.com> wrote:
>>
>>> Mini Trader wrote:
>>>
>>> > task_numa_fault+0x6ed/0xd20
>>>
>>> what happens if you boot the vm with numa=off
>>>
>>>
>>>
>>>
>>

the change mentioned in the article is in the kernel - at least 4.11.2 - I
don't know about your version. The article is about 4.4.

perhaps solved by chance - you have to report back to kernel maintainer I
guess

4.11.2 and 4.10.14

line nr 1395 to 1415
                        if (VMXNET3_VERSION_GE_2(adapter) &&
                            rcd->type == VMXNET3_CDTYPE_RXCOMP_LRO) {
                                struct Vmxnet3_RxCompDescExt *rcdlro;
                                rcdlro = (struct Vmxnet3_RxCompDescExt
*)rcd;

                                segCnt = rcdlro->segCnt;
                                WARN_ON_ONCE(segCnt == 0);
                                mss = rcdlro->mss;
                                if (unlikely(segCnt <= 1))
                                        segCnt = 0;
                        } else {
                                segCnt = 0;
                        }
                } else {
                        BUG_ON(ctx->skb == NULL && !skip_page_frags);

                        /* non SOP buffer must be type 1 in most cases */
                        BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
                        BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);