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

[Thomas Meyer]

Am 20.10.2014 16:48 schrieb Lennart Poettering <lennart at poettering.net>:
>
> 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.

So what about:

kernel.kptr_restrict=1
fs.protected_symlinks=1
fs.protected_hardlinks=1

>
> Lennart 
>
> -- 
> Lennart Poettering, Red Hat 
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