netdev - Re: Linux 4.12+ memory leak on router with i40e NICs

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Date:   Thu, 19 Oct 2017 01:40:58 +0200
From:   Paweł Staszewski <pstaszewski@...are.pl>
To:     Alexander Duyck <alexander.duyck@...il.com>,
        Pavlos Parissis <pavlos.parissis@...il.com>,
        "Anders K. Pedersen | Cohaesio" <akp@...aesio.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "alexander.h.duyck@...el.com" <alexander.h.duyck@...el.com>
Subject: Re: Linux 4.12+ memory leak on router with i40e NICs



W dniu 2017-10-19 o 01:29, Alexander Duyck pisze:
> On Mon, Oct 16, 2017 at 10:51 PM, Vitezslav Samel <vitezslav@...el.cz> wrote:
>> On Tue, Oct 17, 2017 at 01:34:29AM +0200, Paweł Staszewski wrote:
>>> W dniu 2017-10-16 o 18:26, Paweł Staszewski pisze:
>>>> W dniu 2017-10-16 o 13:20, Pavlos Parissis pisze:
>>>>> On 15/10/2017 02:58 πμ, Alexander Duyck wrote:
>>>>>> Hi Pawel,
>>>>>>
>>>>>> To clarify is that Dave Miller's tree or Linus's that you are talking
>>>>>> about? If it is Dave's tree how long ago was it you pulled it since I
>>>>>> think the fix was just pushed by Jeff Kirsher a few days ago.
>>>>>>
>>>>>> The issue should be fixed in the following commit:
>>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/drivers/net/ethernet/intel/i40e/i40e_txrx.c?id=2b9478ffc550f17c6cd8c69057234e91150f5972
>>>>> Do you know when it is going to be available on net-next and
>>>>> linux-stable repos?
>>>>>
>>>>> Cheers,
>>>>> Pavlos
>>>>>
>>>>>
>>>> I will make some tests today night with "net" git tree where this patch
>>>> is included.
>>>> Starting from 0:00 CET
>>>> :)
>>>>
>>>>
>>> Upgraded and looks like problem is not solved with that patch
>>> Currently running system with
>>> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/
>>> kernel
>>>
>>> Still about 0.5GB of memory is leaking somewhere
>>>
>>> Also can confirm that the latest kernel where memory is not leaking (with
>>> use i40e driver intel 710 cards) is 4.11.12
>>> With kernel 4.11.12 - after hour no change in memory usage.
>>>
>>> also checked that with ixgbe instead of i40e with same  net.git kernel there
>>> is no memleak - after hour same memory usage - so for 100% this is i40e
>>> driver problem.
>>    I have (probably) the same problem here but with X520 cards: booting
>> 4.12.x gives me oops after circa 20 minutes of our workload. Booting
>> 4.9.y is OK. This machine is in production so any testing is very
>> limited.
>>
>>    Machine was stable for >2 months (on the desk before got to
>> production) with 4.12.8 but with no traffic on X520 cards.
>>
>>          Cheers,
>>
>>                  Vita
> Sorry but it can't be the same issue since we are discussing a
> different driver (i40e) running different hardware (X710 or XL170).
> You might want to start a new thread for your issue, and/or if
> possible file a bug on e1000.sf.net.
>
> Thanks.
>
> - Alex
>
sorry but bugs reported on e1000.sf.net are delayed - some after about 6 
or more months - when i reported first bug there iv got reply after a 
year about no activity :):) haha - and reported there bug is still 
actrive :)
better for me is now to change nics (for sure cheaper from  the 
perspective of clients :) ) to mellanox or just to replace and use ixgbe 
- that have no this bug (mellanox and ixgbe have no such bug - have many 
servers with them with same conf - and only one with i40e where is same 
conf and memleak)

If nobody from Intel wants to reproduce this - qool - this is not my 
problem but intels :) - there is now many good nics to use - like 
mellanox or just stick with many 10G based on ixgbe that is really good 
driver - but really ? intel guys have no XL710 cards ? i dont want to 
buy another buggy cards to do only kernel bisects .... sorry ....
To do good bisects with this bug You need to spend maybee 200/300 
bisects - and to confirm each - You need maybee 30minutes so count how 
much time You need - more that 100 cards in price from mellanox maybee :)

so imagine what i will do :)


Thanks
Paweł