scottalavender at gmail.com
Tue May 8 21:09:12 UTC 2012
On Tue, May 8, 2012 at 1:02 PM, Kaj Ailomaa <ailomaa at warpmail.net> wrote:
> On 05/08/2012 09:45 PM, Scott Lavender wrote:
> I don't think this is true.
> There are at least two separate things that differ between the
> ubuntu-precise kernel, and the ubuntu-precise-lowlatency kernel.
> One is a patch to the code (which I assume is the two line patch that has
> been under discussion), which as I explained previously will not be needed
> The other is the configuration used for the build. For the configuration,
> we only need to set a few configs differently from the standard ubuntu
> kernel (it's a long list), so that we get our -lowlatency flavor kernel.
> And after adding the configs that Ralph mentioned to the ones that we
> already have specific for -lowlatency, as well as the configs that makes
> the current patch unnessecary, we get this list:
> # CONFIG_RCU_BOOST is not set
> # CONFIG_NTP_PPS is not set
> # CONFIG_RCU_CPU_STALL_DETECTOR is not set
> # CONFIG_RCU_CPU_STALL_VERBOSE is not set
> # CONFIG_PREEMPT_TRACER is not set
> # CONFIG_PREEMPT_NONE is not set
> # CONFIG_PREEMPT_VOLUNTARY is not set
> # CONFIG_EXPERT is not set
> # CONFIG_NO_HZ is not set
> # CONFIG_DEBUG_KERNEL is not set
> Using these configs on top of the default configs for the ubuntu-precise
> kernel we get our current -lowlatency.
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my understanding is that the patch is what actually changes the config
file. perhaps I am mistaken, however.
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