UDS Developments

[Scott Lavender]

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
> anymore.
> 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_CMDLINE_BOOL=y
> CONFIG_CMDLINE="threadirqs"
>
> # 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_TREE_PREEMPT_RCU=y
> CONFIG_PREEMPT_RCU=y
> CONFIG_PREEMPT_NOTIFIERS=y
> # CONFIG_PREEMPT_NONE is not set
> # CONFIG_PREEMPT_VOLUNTARY is not set
>
> CONFIG_PREEMPT=y
> CONFIG_HZ_1000=y
> CONFIG_HZ=1000
> CONFIG_SLAB=y
> # 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.
>
>
> --
> Ubuntu-Studio-devel mailing list
> Ubuntu-Studio-devel at lists.**ubuntu.com<Ubuntu-Studio-devel at lists.ubuntu.com>
> Modify settings or unsubscribe at: https://lists.ubuntu.com/**
> mailman/listinfo/ubuntu-**studio-devel<https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-devel>
>


my understanding is that the patch is what actually changes the config
file.  perhaps I am mistaken, however.

scottl
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-studio-devel/attachments/20120508/a8f5f3ab/attachment.html>