Re: [PATCH 3/6] net: thunderx: Increase transmit queue length

From	Sunil Kovvuri <sunil.kovvuri@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 3/6] net: thunderx: Increase transmit queue length
Date	2015-12-01 17:40 +0100
Message-ID	<qAW8a-3BH-11@gated-at.bofh.it> (permalink)
References	<j48S5-3sd-3@gated-at.bofh.it> <qAPgm-7I5-33@gated-at.bofh.it> <qAUpH-2rO-9@gated-at.bofh.it> <qAVc6-30Q-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hi Pavel Fedin,

Increasing descriptor ring size will lead to more memory allocation.
And what you are seeing is a memory alloc failure and doesn't seem to
be due to this driver change.
I mean it looks like the behavior will be same for other drivers as well.

Probably you might have to set "coherent_pool" size in bootargs to a
higher value.
Can you please check.

Thanks,
Sunil.

On Tue, Dec 1, 2015 at 9:03 PM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
> On Tue, 2015-12-01 at 17:40 +0300, Pavel Fedin wrote:
>>  Hello!
>>
>>  This one breaks networking on my machine:
>> --- cut ---
>> swiotlb: coherent allocation failed for device 0002:01:08.4 size=4198400
>> CPU: 2 PID: 3655 Comm: NetworkManager Tainted: G        W  O    4.2.6+ #201
>> Hardware name: Cavium ThunderX CN88XX
>
> Are you sure 4.2.6 kernel is suitable for backporting this patch aimed
> for linux-4.5 ?
>
>
>
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Thread

[PATCH 3/6] net: thunderx: Increase transmit queue length Sunil Goutham <sunil.kovvuri@gmail.com> - 2015-12-01 10:20 +0100
  RE: [PATCH 3/6] net: thunderx: Increase transmit queue length Pavel Fedin <p.fedin@samsung.com> - 2015-12-01 15:50 +0100
    Re: [PATCH 3/6] net: thunderx: Increase transmit queue length Eric Dumazet <eric.dumazet@gmail.com> - 2015-12-01 16:40 +0100
      Re: [PATCH 3/6] net: thunderx: Increase transmit queue length Sunil Kovvuri <sunil.kovvuri@gmail.com> - 2015-12-01 17:40 +0100
        Re: [PATCH 3/6] net: thunderx: Increase transmit queue length David Miller <davem@davemloft.net> - 2015-12-01 20:40 +0100
          Re: [PATCH 3/6] net: thunderx: Increase transmit queue length Sunil Kovvuri <sunil.kovvuri@gmail.com> - 2015-12-02 06:50 +0100
            Re: [PATCH 3/6] net: thunderx: Increase transmit queue length Eric Dumazet <eric.dumazet@gmail.com> - 2015-12-02 14:30 +0100
              Re: [PATCH 3/6] net: thunderx: Increase transmit queue length Eric Dumazet <eric.dumazet@gmail.com> - 2015-12-02 18:00 +0100
              Re: [PATCH 3/6] net: thunderx: Increase transmit queue length Sunil Kovvuri <sunil.kovvuri@gmail.com> - 2015-12-02 18:00 +0100
            Re: [PATCH 3/6] net: thunderx: Increase transmit queue length David Miller <davem@davemloft.net> - 2015-12-02 18:40 +0100
        RE: [PATCH 3/6] net: thunderx: Increase transmit queue length Pavel Fedin <p.fedin@samsung.com> - 2015-12-02 10:10 +0100
          RE: [PATCH 3/6] net: thunderx: Increase transmit queue length Pavel Fedin <p.fedin@samsung.com> - 2015-12-02 11:40 +0100
            RE: [PATCH 3/6] net: thunderx: Increase transmit queue length Pavel Fedin <p.fedin@samsung.com> - 2015-12-02 13:30 +0100
              Re: [PATCH 3/6] net: thunderx: Increase transmit queue length Sunil Kovvuri <sunil.kovvuri@gmail.com> - 2015-12-02 14:00 +0100
                RE: [PATCH 3/6] net: thunderx: Increase transmit queue length Pavel Fedin <p.fedin@samsung.com> - 2015-12-02 14:30 +0100
      RE: [PATCH 3/6] net: thunderx: Increase transmit queue length Pavel Fedin <p.fedin@samsung.com> - 2015-12-02 09:10 +0100

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