netdev - Re: Bug Report Napi GRO ixgbe

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Date:   Mon, 26 Apr 2021 11:31:34 +0300
From:   Martin Zaharinov <micron10@...il.com>
To:     Paolo Abeni <pabeni@...hat.com>
Cc:     netdev <netdev@...r.kernel.org>, Wei Wang <weiwan@...gle.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexander Duyck <alexanderduyck@...com>,
        Hannes Frederic Sowa <hannes@...essinduktion.org>,
        Eric Dumazet <edumazet@...gle.com>, alobakin@...me
Subject: Re: Bug Report Napi GRO ixgbe

Hi Paolo
Sorry for delay.

After disable gro on eth interface and team0 and now work fine.

In this case I user kernel 5.11.12 but after release 5.12 I will migrate to them and will check for problem with kthread.

Thanks,
I will update if have other problem.

Martin	

> On 12 Apr 2021, at 11:36, Paolo Abeni <pabeni@...hat.com> wrote:
> 
> Hello,
> 
> On Sat, 2021-04-10 at 14:22 +0300, Martin Zaharinov wrote:
>> Hi  Team
>> 
>> One report latest kernel 5.11.12 
>> 
>> Please check and help to find and fix
> 
> Please provide a complete splat, including the trapping instruction.
>> 
>> Apr 10 12:46:25  [214315.519319][ T3345] R13: ffff8cf193ddf700 R14: ffff8cf238ab3500 R15: ffff91ab82133d88
>> Apr 10 12:46:26  [214315.570814][ T3345] FS:  0000000000000000(0000) GS:ffff8cf3efb00000(0000) knlGS:0000000000000000
>> Apr 10 12:46:26  [214315.622416][ T3345] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> Apr 10 12:46:26  [214315.648390][ T3345] CR2: 00007f7211406000 CR3: 00000001a924a004 CR4: 00000000001706e0
>> Apr 10 12:46:26  [214315.698998][ T3345] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> Apr 10 12:46:26  [214315.749508][ T3345] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> Apr 10 12:46:26  [214315.799749][ T3345] Call Trace:
>> Apr 10 12:46:26  [214315.824268][ T3345]  netif_receive_skb_list_internal+0x5e/0x2c0
>> Apr 10 12:46:26  [214315.848996][ T3345]  napi_gro_flush+0x11b/0x260
>> Apr 10 12:46:26  [214315.873320][ T3345]  napi_complete_done+0x107/0x180
>> Apr 10 12:46:26  [214315.897160][ T3345]  ixgbe_poll+0x10e/0x2a0 [ixgbe]
>> Apr 10 12:46:26  [214315.920564][ T3345]  __napi_poll+0x1f/0x130
>> Apr 10 12:46:26  [214315.943475][ T3345]  napi_threaded_poll+0x110/0x160
>> Apr 10 12:46:26  [214315.966252][ T3345]  ? __napi_poll+0x130/0x130
>> Apr 10 12:46:26  [214315.988424][ T3345]  kthread+0xea/0x120
>> Apr 10 12:46:26  [214316.010247][ T3345]  ? kthread_park+0x80/0x80
>> Apr 10 12:46:26  [214316.031729][ T3345]  ret_from_fork+0x1f/0x30
> 
> Could you please also provide the decoded the stack trace? Something
> alike the following will do:
> 
> cat <file contaning the splat> | ./scripts/decode_stacktrace.sh <path to vmlinux>
> 
> Even more importantly:
> 
> threaded napi is implemented with the merge
> commit adbb4fb028452b1b0488a1a7b66ab856cdf20715, which landed into the
> vanilla tree since v5.12.rc1 and is not backported to 5.11.x. What
> kernel are you really using?
> 
> Thanks,
> 
> Paolo