On Wed, 16 Jan 2019 10:57:56 -0700 Keith Busch <keith.busch@xxxxxxxxx> wrote: > Add entries for memory initiator and target node class attributes. > > Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx> > --- > Documentation/ABI/stable/sysfs-devices-node | 25 ++++++++++++++++++++++++- > 1 file changed, 24 insertions(+), 1 deletion(-) > > diff --git a/Documentation/ABI/stable/sysfs-devices-node b/Documentation/ABI/stable/sysfs-devices-node > index 3e90e1f3bf0a..a9c47b4b0eee 100644 > --- a/Documentation/ABI/stable/sysfs-devices-node > +++ b/Documentation/ABI/stable/sysfs-devices-node > @@ -90,4 +90,27 @@ Date: December 2009 > Contact: Lee Schermerhorn <lee.schermerhorn@xxxxxx> > Description: > The node's huge page size control/query attributes. > - See Documentation/admin-guide/mm/hugetlbpage.rst > \ No newline at end of file > + See Documentation/admin-guide/mm/hugetlbpage.rst > + > +What: /sys/devices/system/node/nodeX/classY/ > +Date: December 2018 > +Contact: Keith Busch <keith.busch@xxxxxxxxx> > +Description: > + The node's relationship to other nodes for access class "Y". > + > +What: /sys/devices/system/node/nodeX/classY/initiator_nodelist > +Date: December 2018 > +Contact: Keith Busch <keith.busch@xxxxxxxxx> > +Description: > + The node list of memory initiators that have class "Y" access > + to this node's memory. CPUs and other memory initiators in > + nodes not in the list accessing this node's memory may have > + different performance. > + > +What: /sys/devices/system/node/nodeX/classY/target_nodelist > +Date: December 2018 > +Contact: Keith Busch <keith.busch@xxxxxxxxx> > +Description: > + The node list of memory targets that this initiator node has > + class "Y" access. Memory accesses from this node to nodes not > + in this list may have differet performance. Different performance from what? In the other thread we established that these target_nodelists are kind of a backwards reference, they all have their characteristics anyway. Perhaps this just needs to say: "Memory access from this node to these targets may have different performance"? i.e. Don't make the assumption I did that they should all be the same!
