Re: [PATCHv6 08/10] acpi/hmat: Register performance attributes
flat view
From: "Rafael J. Wysocki" <rafael@kernel.org>
Date: 2019-02-20 22:04:34
Also in:
linux-acpi, linux-mm, lkml
On Thu, Feb 14, 2019 at 6:10 PM Keith Busch [off-list ref] wrote:
Save the best performance access attributes and register these with the memory's 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 pairings at this time. Signed-off-by: Keith Busch <redacted>
Acked-by: Rafael J. Wysocki <redacted>
quoted hunk ↗ jump to hunk
--- drivers/acpi/hmat/hmat.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)diff --git a/drivers/acpi/hmat/hmat.c b/drivers/acpi/hmat/hmat.c index b29f7160c7bb..6833c4897ff4 100644 --- a/drivers/acpi/hmat/hmat.c +++ b/drivers/acpi/hmat/hmat.c@@ -549,12 +549,27 @@ static __init void hmat_register_target_initiators(struct memory_target *target) } } +static __init void hmat_register_target_perf(struct memory_target *target) +{ + unsigned mem_nid = pxm_to_node(target->memory_pxm); + + if (!target->hmem_attrs.read_bandwidth && + !target->hmem_attrs.read_latency && + !target->hmem_attrs.write_bandwidth && + !target->hmem_attrs.write_latency) + return; + + node_set_perf_attrs(mem_nid, &target->hmem_attrs, 0); +} + static __init void hmat_register_targets(void) { struct memory_target *target; - list_for_each_entry(target, &targets, node) + list_for_each_entry(target, &targets, node) { hmat_register_target_initiators(target); + hmat_register_target_perf(target); + } } static __init void hmat_free_structures(void) --2.14.4