john wendel wrote:
On 12/31/2009 12:14 PM, Bill Davidsen wrote:
Konstantin Svist wrote:
On 12/31/2009 09:10 AM, Bill Davidsen wrote:
And leaves you with no Fedora patches and the disk performance
regression issues of 2.6.32. Also a tainted kernel which some
developers will ignore if you get a trace, etc.
I thought it's only tainted if there are non-GPL modules compiled in.
For instance, I saw the tainted message whenever I insmod'ed fglrx
driver
You're right, I am assuming he was talking about the nvidia modules
which are not GPL, when he mentioned 2.6.32.2+Nvidia. So it would only
me tainted if he wanted to have graphics. Or the licensing may have
changed, things are not the same for long.
Who needs the Fedora patches? I'm not missing them here. Can you tell me
exactly the patches I'm missing and what they would do for me? If these
patches are so valuable, why aren't they submitted upstream so the world
can benefit. Maybe because Linus doesn't want them?
I haven't noticed any disk performance regression/problem. Maybe I don't
beat it hard enough. hdparm -Tt shows 60.84 MB/s with the fedora kernel
and 61.09 MB/s with my kernel. I know there's a CFS throughput problem,
but that's easily fixed.
You probably won't see a problem with random access using the hdpart sequential
access test ;-) But there's a thread in LKML something like" 30% regression in
random throughput" and depending on what you do you will really see that.
My Fedora kernel would also be tainted, since I have to run the Nvidia
driver in any case.
I don't see any down side to running my own kernel. Plus I save 8MB of
kernel memory (enough to negate the bloated Nvidia driver), and I enjoy
the tweaking.
I was mentioning 2.6.32 particularly, not building kernels in general. I built
that to try the new video drivers (lock up and run 3x slower than vesa for me),
and BFS (guess I don't trigger anything that shows its advantages, if any). But
I don't bother to build daily kernels unless there a good reason. Been there
done that, ran -ck, -aa, -mm, and -ac kernels, built 2.5 kernels daily, 3-4/day
when CFS patches were coming out a lot, and unless I have a patch to test I
leave it to others.
Best wishes in the new year!
John
--
Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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