Re: Minor page faults from memory compaction causing in-band transitions

[Philippe Gerum <rpm@xenomai.org>]

Hi Jay,

Looks good to me, very useful for understanding some of the intricacies
of virtual memory management vs real-time workloads, and how to address
them. I would happily merge a commit with this information as-is.

[I noticed a couple of hiccups breaking the patch format likely due to
the MUA].

Jay Sridharan <jayasurya.sridharan@gmail.com> writes:

> Hi Phillipe,
>
> Let me know what you think of this patch for the docs:
>
> diff --git a/content/core/caveat.md b/content/core/caveat.md
> index b24e270..e11d605 100644
> --- a/content/core/caveat.md
> +++ b/content/core/caveat.md
> @@ -70,6 +70,68 @@ which depend on instrumenting the spinlock constructs (e.g.
>  `CONFIG_DEBUG_PREEMPT`), you may want to disable all the related kernel
>  options, starting with `CONFIG_SMP`.
>
> +### Memory compaction and page migration impact real-time behavior
> {#caveat-memory-compaction}

<line wrapped>

> +
> +- Launch EVL threads. At the end of initialization, but before
> calling mlockall..

<line wrapped>

-- 
Philippe.