The patch titled
Subject: x86/resctrl: replace open code cacheinfo search in rdtgroup_cbm_to_size()
has been added to the -mm mm-nonmm-unstable branch. Its filename is
x86-resctrl-replace-open-code-cacheinfo-search-in-rdtgroup_cbm_to_size.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/x86-resctrl-replace-open-code-cacheinfo-search-in-rdtgroup_cbm_to_size.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Tony Luck <tony.luck@xxxxxxxxx>
Subject: x86/resctrl: replace open code cacheinfo search in rdtgroup_cbm_to_size()
Date: Fri, 31 May 2024 12:57:20 -0700
Use get_cpu_cacheinfo_level() instead of open coded search.
Link: https://lkml.kernel.org/r/20240531195720.232561-4-tony.luck@xxxxxxxxx
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Babu Moger <babu.moger@xxxxxxx>
Cc: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Cc: Dave Martin <Dave.Martin@xxxxxxx>
Cc: Drew Fustini <dfustini@xxxxxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: James Morse <james.morse@xxxxxxx>
Cc: Maciej Wieczor-Retman <maciej.wieczor-retman@xxxxxxxxx>
Cc: Peter Newman <peternewman@xxxxxxxxxx>
Cc: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c~x86-resctrl-replace-open-code-cacheinfo-search-in-rdtgroup_cbm_to_size
+++ a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1450,18 +1450,14 @@ out:
unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r,
struct rdt_domain *d, unsigned long cbm)
{
- struct cpu_cacheinfo *ci;
+ struct cacheinfo *ci;
unsigned int size = 0;
- int num_b, i;
+ int num_b;
num_b = bitmap_weight(&cbm, r->cache.cbm_len);
- ci = get_cpu_cacheinfo(cpumask_any(&d->cpu_mask));
- for (i = 0; i < ci->num_leaves; i++) {
- if (ci->info_list[i].level == r->cache_level) {
- size = ci->info_list[i].size / r->cache.cbm_len * num_b;
- break;
- }
- }
+ ci = get_cpu_cacheinfo_level(cpumask_any(&d->cpu_mask), r->cache_level);
+ if (ci)
+ size = ci->size / r->cache.cbm_len * num_b;
return size;
}
_
Patches currently in -mm which might be from tony.luck@xxxxxxxxx are
cacheinfo-add-function-to-get-cacheinfo-for-a-given-cpu-cachelevel.patch
x86-resctrl-replace-open-code-cacheinfo-search-in-pseudo_lock_region_init.patch
x86-resctrl-replace-open-code-cacheinfo-search-in-rdtgroup_cbm_to_size.patch
