[systemd-devel] [PATCH] sysctl.d: default to fq_codel, fight bufferbloat

[Lennart Poettering]

On Thu, 16.10.14 14:05, Michal Schmidt (mschmidt at redhat.com) wrote:

> Quoting from Jon Corbet's report of Stephen Hemminger's talk at Linux
> Plumbers Conference 2014 (https://lwn.net/Articles/616241/):
> 
>     [...] So Stephen encouraged everybody to run a command like:
> 
>     sysctl -w net.core.default_qdisc=fq_codel
> 
>     That will cause fq_codel to be used for all future connections (up
>     to the next reboot). Unfortunately, the default queuing discipline
>     cannot be changed, since it will certainly disturb some user's
>     workload somewhere.
> 
> So kernel developers know the best default is fq_codel, but won't
> change to it in the kernel itself. Instead they expect distros to do it.
> Let's have the recommended default in systemd.

Judging by the article this sounds like a good thing to do, and
systemd seems to be an OK place for this change if the kernel folks
don't want to make it. Hence, go ahead, but make sure to add this to
NEWS with an explanation that downstream distros should be aware of
the change, and possibly revert it, if they don't want to go down this
route.

Lennart

-- 
Lennart Poettering, Red Hat