The patch titled
Subject: x86/resctrl: replace open code cacheinfo search in pseudo_lock_region_init()
has been added to the -mm mm-nonmm-unstable branch. Its filename is
x86-resctrl-replace-open-code-cacheinfo-search-in-pseudo_lock_region_init.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-pseudo_lock_region_init.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 pseudo_lock_region_init()
Date: Fri, 31 May 2024 12:57:19 -0700
Use get_cpu_cacheinfo_level() instead of open coded search.
Link: https://lkml.kernel.org/r/20240531195720.232561-3-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/pseudo_lock.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
--- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c~x86-resctrl-replace-open-code-cacheinfo-search-in-pseudo_lock_region_init
+++ a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
@@ -292,9 +292,8 @@ static void pseudo_lock_region_clear(str
*/
static int pseudo_lock_region_init(struct pseudo_lock_region *plr)
{
- struct cpu_cacheinfo *ci;
+ struct cacheinfo *ci;
int ret;
- int i;
/* Pick the first cpu we find that is associated with the cache. */
plr->cpu = cpumask_first(&plr->d->cpu_mask);
@@ -306,15 +305,11 @@ static int pseudo_lock_region_init(struc
goto out_region;
}
- ci = get_cpu_cacheinfo(plr->cpu);
-
- plr->size = rdtgroup_cbm_to_size(plr->s->res, plr->d, plr->cbm);
-
- for (i = 0; i < ci->num_leaves; i++) {
- if (ci->info_list[i].level == plr->s->res->cache_level) {
- plr->line_size = ci->info_list[i].coherency_line_size;
- return 0;
- }
+ ci = get_cpu_cacheinfo_level(plr->cpu, plr->s->res->cache_level);
+ if (ci) {
+ plr->line_size = ci->coherency_line_size;
+ plr->size = rdtgroup_cbm_to_size(plr->s->res, plr->d, plr->cbm);
+ return 0;
}
ret = -1;
_
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
