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    SubjectRe: [PATCH] PCI: Clear bridge MEM_64 flag if one child does not support it
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    On Tue, Dec 9, 2014 at 2:15 PM, Marek Kordík <kordikmarek@gmail.com> wrote:
    > On 12/09/2014 08:42 PM, Yinghai Lu wrote:
    >>
    >> On Tue, Dec 9, 2014 at 10:22 AM, Bjorn Helgaas <bhelgaas@google.com>
    >> wrote:
    >>>
    >>> On Tue, Dec 9, 2014 at 11:07 AM, Marek Kordík <kordikmarek@gmail.com>
    >>> wrote:
    >>>>
    >>>> I have built and booted your branch and it works well. Do you want me to
    >>>> attach some logs?
    >>>> (I am new here and I have read http://www.tux.org/lkml/ and I don't want
    >>
    >> Can you run some graphics benchmark program to check the performance
    >> between
    >> 1.
    >>
    >> git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
    >> branch: for-pci-allocate-fit-3.18
    >>
    >> 2.
    >> v 3.18 + clear mmio64 flags when children device does not support it
    >>
    >>
    > I have run Unigine Heaven benchmark on both versions (I tried version 2.
    > with and also without kernel parameters "debug ignore_loglevel pci=realloc")
    > and the performance of each version was the same (70-71 points). I tried to
    > run this benchmark also with kernel 3.15.10 and the result was 67 points.
    > Tomorrow I can try to run some more benchmarks, today I didn't have much
    > time.

    so putting mem pref under bridge mem does not cause performance loss?

    Thanks

    Yinghai


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