diff --git a/doc/source/admin/pci-passthrough.rst b/doc/source/admin/pci-passthrough.rst
index ed90cd26a12d..05b740a1c47c 100644
--- a/doc/source/admin/pci-passthrough.rst
+++ b/doc/source/admin/pci-passthrough.rst
@@ -463,10 +463,11 @@ the PF and its VFs are made available for consumption.
 
 Since nova 27.0.0 (2023.1 Antelope) scheduling and allocation of PCI devices
 in Placement can also be enabled via
-:oslo.config:option:`filter_scheduler.pci_in_placement`. Please note that this
-should only be enabled after all the computes in the system is configured to
-report PCI inventory in Placement via
-enabling :oslo.config:option:`pci.report_in_placement`. In Antelope flavor
+:oslo.config:option:`filter_scheduler.pci_in_placement` config option set in
+the nova-api, nova-scheduler, and nova-conductor configuration. Please note
+that this should only be enabled after all the computes in the system is
+configured to report PCI inventory in Placement via enabling
+:oslo.config:option:`pci.report_in_placement`. In Antelope flavor
 based PCI requests are support but Neutron port base PCI requests are not
 handled in Placement.
 
diff --git a/nova/conf/scheduler.py b/nova/conf/scheduler.py
index c47170e40075..a5f0c5c15e3e 100644
--- a/nova/conf/scheduler.py
+++ b/nova/conf/scheduler.py
@@ -905,7 +905,9 @@ compute hosts.
 When enabled the scheduler queries Placement about the PCI device
 availability to select destination for a server with PCI request. The scheduler
 also allocates the selected PCI devices in Placement. Note that this logic
-does not replace the PCIPassthroughFilter but extends it.
+does not replace the PCIPassthroughFilter but extends it. Note that this
+config option needs to be set in the configuration of nova-api, nova-scheduler,
+and all nova-conductor services.
 
 * ``[pci] report_in_placement``
 * ``[pci] alias``