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How do we get this magic performance-boosting 200 line patch?

The Phoronix article "The ~200 Line Linux Kernel Patch That Does Wonders" has created a lot of noise. It seems reports are flooding in that this patch noticeably increases responsiveness during aggressive cpu usage.

How likely is it that this patch will make it into the next version of Ubuntu? And will it be backported?

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  • My question is not answered in that link. – Lightbreeze Nov 17 '10 at 5:01
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    @leann drew out the entire process and described that since the patch is relatively new it hasn't made it into the Kernel's upstream. The likelihood of it being included in Ubuntu is just about completely dependent on when the Linux Kernel (as upstream) includes the patch. – Marco Ceppi Nov 17 '10 at 5:12

The likelihood of it being included in Ubuntu is mostly dependent on if the Linux Kernel (as upstream) includes the patch in the stable release 2.6.38 which will go into Natty Narwhal.

It's possible the Ubuntu kernel team will patch the Ubuntu kernel in time for the release if they feel it's really warranted. But that's up to them. You can track what the kernel team does here:


They often have meetings and discuss these sorts of things, the meeting minutes often contain the decision to patch certain things.

There is probably no chance that it'll be back ported, even if it's 200 lines, it's modifying key areas of kernel functionality which change all the time (making the patch hard to apply). If it were to go wrong, it'd be hard to fix. I'd say it would be almost impossible to accept a backport.

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    I would say that it also depends on what other distros are going to do. For example it might get backported to the 10.04 LTS kernel (2.6.32), because that is a long term support kernel upstream, and is also used by RHEL 6 for example. A backport to 2.6.35 ("Maverick") is less likely, as that would have to be done & supported by the Ubuntu kernel team on their own. – JanC Nov 18 '10 at 9:29
  • This has been pulled into 2.6.38-rc1 so I expect it will be in the final (pending testing). – Oli Jan 20 '11 at 23:38

The answer is simple.If the patch makes it to kernel 2.6.38, then Natty will have it as well.

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