[CentOS] A special kernel for linux as guest os

[Scott McClanahan]

On Fri, 2007-09-21 at 06:22 -0700, Akemi Yagi wrote:
> On 9/21/07, Scott McClanahan <scott.mcclanahan at trnswrks.com> wrote:
> > On Thu, 2007-09-20 at 15:46 -0700, Akemi Yagi wrote:
> > > On 9/20/07, Yuji Tsuchimoto <nox at sea-mew.jp> wrote:
> > > > Dear Yagi-san,
> > > >
> > > > > I heard from the horse's mouth that the CentOS team is working on the
> > > > > 100Hz centosplus kernel. I think your request triggered the action :-)
> > > > >  They want make people happy.
> > > > That sounds nice!
> > > > This TIPS, CONFIG_HZ=100, is one of FAQs. It will make most of us happy.
> > > >
> > > > Now we can get kernel-vm package on dev.centos.org.
> > > > Is it a test release of the special kernel?
> > > > I installed the kernel-vm. Its change-log shows HZ=100.
> > > > And the kernel seems better for clock interval on VMWare.
> > > > Thanks a lot.
> > > > Yuji
> > >
> > > Tsuchimoto-san,
> > >
> > > Yes, they are in testing.  Some of us have been running the 100HZ
> > > kernel for more than 2 months and have not seen any problem so far.
> > > If you wish to know more details about the development of the
> > > virtualization-optimized kernel, please take a look at:
> > >
> > > http://bugs.centos.org/view.php?id=2189
> > >
> > > And feel free to add any comments you have on that report.
> > >
> > > Akemi
> > > _______________________________________________
> >
> > Will the only deviation from the base/updates kernels be the decreased
> > number of timer interrupts?  Thanks.
> 
> Yes, that is the only difference between the standard kernel and
> kernel-vm.  We do have a CentOS 5 i686 UP version which gives slightly
> better performance than the default SMP. But this is not an official
> version.
> 
> Akemi
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Not sure if this was mentioned earlier in the thread but I just watched
a session from vmworld and they commented that more recent releases of
the linux kernel set CONFIG_HZ=250.  Can anyone comment on the truth to
that and how relative it is to the CentOS distro?  Thanks.