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

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Message-ID: <CAKgT0Udb5DVu6CB5U7rGNERZwMCKZUTii=qxn6hFzc=5zEZc1w@mail.gmail.com>
Date:   Wed, 18 Oct 2017 16:29:59 -0700
From:   Alexander Duyck <alexander.duyck@...il.com>
To:     Paweł Staszewski <pstaszewski@...are.pl>,
        Pavlos Parissis <pavlos.parissis@...il.com>,
        Alexander Duyck <alexander.duyck@...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

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