On Fri, Oct 17, 2014 at 11:01 AM, Michal Schmidt <mschmidt(a)redhat.com> wrote:
Dne 16.10.2014 v 16:19 Josh Boyer napsal(a):
> On Wed, Oct 15, 2014 at 9:02 PM, Matthew Miller
> <mattdm(a)fedoraproject.org> wrote:
>>
>> Reading
https://lwn.net/Articles/616241/, getting myself in happily over
>> my
>> level of actual knowledge about the state of things.
>>
>> From that article, it seems like it might be worth trying
>> net.core.default_qdisc = fq_codel by default. Just tossing this out there
>> for the consideration of someone who really knows what they're talking
>> about
>> in this area.
>
>
> I think the answer, as usual, is: "It depends." It's not a silver
> bullet for all problems, but it would probably help in some cases. I
> would actually think Server could use this more than Workstation, as
> the article points out that wireless networking has a number of other
> issues to consider. I've added Neil on CC, who's probably much more
> equipped to weigh in on this than either of us.
>
> In any case, if this change is done it should be done in the
> initscripts package. It's a runtime tunable and we don't need to be
> patching the kernel to change the default.
Josh,
we're considering adding "net.core.default_qdisc = fq_codel" to
the default sysctl config shipped with systemd.
Assuming we do that, would you change CONFIG_NET_SCH_FQ_CODEL
in the Fedora config to make it built-in rather than a module?
I've made this change in 3.17.1-301.fc21. It doesn't change the
default by itself so it seemed safe to do either way and avoids the
SELinux issue.
josh