On 10/1/24 3:10 AM, Bagas Sanjaya wrote:
On Thu, Sep 26, 2024 at 11:16:53PM +0200, Antonino Maniscalco wrote:
+.. SPDX-License-Identifier: GPL-2.0
+
+:orphan:
Why don't this be added to toctree in Documentation/gpu/index.rst?
Yes so there is existing orphan documentation for msm so my intention
was to add it as orphan then eventually send out a series to organize it
properly (so creating an msm directory with an index which then points
two files we currently have). Does that sound good to you?
+
+=============
+MSM Preemtion
+=============
s/Preemtion/Preemption/
Thanks for pointing out the typo!
+This mechanism can be used by the kernel to switch between rings. Whenever a
+submission occurs the kernel finds the highest priority ring which isn't empty
+and preempts to it if said ring is not the one being currently executed. This is
+also done whenever a submission completes to make sure execution resumes on a
+lower priority ring when a higher priority ring is done.
Do you mean that the kernel finds highest priority ring possible that is not
empty? What if all these 4 rings are empty?
Confused...
Yep, if all rings are empty we don't preempt, same as when the highest
priority ring is the current one.
Best regards,
--
Antonino Maniscalco <antomani103@xxxxxxxxx>
