[mdlug] Linux Kernel 6.1

[Gib]

I was in a job interview and was asked if I ever compiled something from
source. It has been a while. I guess the most common software that I use is
available in binary form now.

On Sat, Dec 17, 2022 at 7:47 AM Carl T. Miller <carl at carltm.com> wrote:

> I haven't compiled my own kernels for several years,
> although I used to every time.  Thanks for mentioning
> these new options, in case I need to use them in the
> future.
>
> c
>
>
> On 12/17/22 08:34 AM, LAP wrote:
> > To those of you, like me, who compiles his own kernel there
> > are some interesting changes in the latest 6.1 release.  Usually --
> > for me anyway -- a new kernel doesn't seem to differ much from
> > the previous versions but not this time.
> >
> > Doing the usual "make oldconfig" the first noteworthy feature
> > that appears is:
> >
> >   Multi-Gen LRU (LRU_GEN) [N/y/?] (NEW)
> >
> > Multi-Gen LRU is a new high-performance memory management
> > implementation that is intended to replace the old one.
> >
> > But it is not enabled by default and so I enabled it.
> >
> > Next along was this:
> >
> >   NR_CPUS is set to an actual number of CPUs (FORCE_NR_CPUS) [N/y/?]
> (NEW)
> >
> > I had to do some checking and I found that the usual .config
> > entry for NR_CPUS involves a range, with the default being 64:
> >
> > CONFIG_NR_CPUS_RANGE_BEGIN=2
> > CONFIG_NR_CPUS_RANGE_END=512
> > CONFIG_NR_CPUS_DEFAULT=64
> >
> > Supposedly, forcing the NR_CPUS to be a specific value will allow
> > optimization of kernel routines.
> >
> > https://www.spinics.net/lists/kernel/msg4493525.html
> >
> > More optimization, in my assessment is always better and so I enabled
> > this option as well.
> >
> > Ideally, every Linux user should at least build his own kernel.  The
> > distros can only offer a generic, lowest-common-denominator type product.
> >
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