Comment 5 for bug 1567578

Hello,

After running a bisect between tags libnl3_2_21 and libnl3_2_22 I identified
the fixer commit to be 807fddc nl: Increase receive buffer size to 4 pages

commit 807fddc4cd9ecb12ba64e1b7fa26d86b6c2f19b0
Author: Thomas Graf <email address hidden>
Date: Wed May 8 13:52:27 2013 +0200

    nl: Increase receive buffer size to 4 pages

    Assuming that the kernel does not send more than a page is no longer valid,
    and enabling MSG_PEEK'ing by default to figure out the exact message buffer
    requirements can have a negative influence on the performance of existing
    applications. Bumping the default receive buffer space to 4 pages seems
    a sane default.

    Signed-off-by: Thomas Graf <email address hidden>

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After applying this patch on top of the current trusty-updates this problem
is not longer exhibited and I can attach the full 128 VFs to the guest.

I am proposing this patch for SRU, and I already updated the description
with the reproduction steps.