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	2015-12-02 14:00 +0100
Message-ID	<qBfaO-7ik-25@gated-at.bofh.it> (permalink)
References	(3 earlier) <qAVc6-30Q-13@gated-at.bofh.it> <qAW8a-3BH-11@gated-at.bofh.it> <qBbAd-59b-5@gated-at.bofh.it> <qBcZj-5WX-1@gated-at.bofh.it> <qBeHM-76w-17@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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>After getting it working in guest i tried to apply it to host. With total of 128 virtual functions (= 128 interfaces) it does not work at all.
> Even after bumping cma region size to insane value of 2GB more than half of interfaces still failed to allocate queues.
> And after setting cma=3G i could not mount my rootfs.

Here what you are saying is half of the interfaces were initialized
succesfully and rest didn't.
So this issue is not something which is introduced by this patch.

> Can we use some other method for allocating queues, which would not require such a huge coherent pool?
There are so many drivers which use dma_alloc_coherent() directly or
via pci_alloc_consistent() to
allocate memory. How many drivers should we modify.
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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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