On Thu, 24 Jan 2019 16:07:21 -0700 Keith Busch <[email protected]> wrote:
> Register the local attached performace access attributes with the memory's performance > node if HMAT provides the locality table. While HMAT does make it possible > to know performance for all possible initiator-target pairings, we export > only the local and matching pairings at this time. > > Signed-off-by: Keith Busch <[email protected]> > --- > drivers/acpi/hmat/Kconfig | 1 + > drivers/acpi/hmat/hmat.c | 14 ++++++++++++++ > 2 files changed, 15 insertions(+) > > diff --git a/drivers/acpi/hmat/Kconfig b/drivers/acpi/hmat/Kconfig > index c9637e2e7514..08e972ead159 100644 > --- a/drivers/acpi/hmat/Kconfig > +++ b/drivers/acpi/hmat/Kconfig > @@ -2,6 +2,7 @@ > config ACPI_HMAT > bool "ACPI Heterogeneous Memory Attribute Table Support" > depends on ACPI_NUMA > + select HMEM_REPORTING > help > If set, this option causes the kernel to set the memory NUMA node > relationships and access attributes in accordance with ACPI HMAT > diff --git a/drivers/acpi/hmat/hmat.c b/drivers/acpi/hmat/hmat.c > index 85fd835c2e23..917e6122b3f0 100644 > --- a/drivers/acpi/hmat/hmat.c > +++ b/drivers/acpi/hmat/hmat.c > @@ -430,6 +430,19 @@ static __init void > hmat_register_target_initiators(struct memory_target *target) > hmat_register_if_local(target, initiator); > } > > +static __init void hmat_register_target_perf(struct memory_target *target) > +{ > + unsigned mem_nid = pxm_to_node(target->memory_pxm); > + struct node_hmem_attrs hmem_attrs = { > + .read_bandwidth = target->read_bandwidth, > + .write_bandwidth= target->write_bandwidth, > + .read_latency = target->read_latency, > + .write_latency = target->write_latency, > + }; > + > + node_set_perf_attrs(mem_nid, &hmem_attrs, 0); > +} > + > static __init void hmat_register_targets(void) > { > struct memory_target *target, *tnext; > @@ -439,6 +452,7 @@ static __init void hmat_register_targets(void) > list_for_each_entry_safe(target, tnext, &targets, node) { > list_del(&target->node); > hmat_register_target_initiators(target); > + hmat_register_target_perf(target); > kfree(target); > } >
