Re: [PATCH v3 2/3] soc: qcom: rmtfs: Support discarding guard pages

Konrad Dybcio
2023-09-21T20:23:59Z

On 9/21/23 04:37, Bjorn Andersson wrote:
> In some configurations, the exact placement of the rmtfs shared memory
> region isn't so strict. The DeviceTree author can then choose to use the
> "size" property and rely on the OS for placement (in combination with
> "alloc-ranges", if desired).
>
> But on some platforms the rmtfs memory region may not be allocated
> adjacent to regions allocated by other clients. Add support for
> discarding the first and last 4k block in the region, if
> qcom,use-guard-pages is specified in DeviceTree.
>
> Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
> ---
I don't want to block this anymore, but I guess I should ask
the question whether it would be valuable to add a common
reserved-memory property for e.g. low-padding and high-padding

Have we seen cases of that outside rmtfs?

Konrad