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Date: Fri, 9 Feb 2024 09:28:25 -0600
From: "Moger, Babu" <babu.moger@....com>
To: Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>,
Peter Newman <peternewman@...gle.com>, Jonathan Corbet <corbet@....net>,
Shuah Khan <skhan@...uxfoundation.org>, x86@...nel.org
Cc: Shaopeng Tan <tan.shaopeng@...itsu.com>, James Morse
<james.morse@....com>, Jamie Iles <quic_jiles@...cinc.com>,
Randy Dunlap <rdunlap@...radead.org>, Drew Fustini <dfustini@...libre.com>,
linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
patches@...ts.linux.dev
Subject: Re: [PATCH v15-RFC 2/8] x86/resctrl: Move all monitoring functions to
RDT_RESOURCE_L3_MON
Tony,
On 1/30/24 16:20, Tony Luck wrote:
> Switch over all places that setup and use monitoring funtions to
functions?
> use the new resource structure.
>
> Signed-off-by: Tony Luck <tony.luck@...el.com>
> ---
> arch/x86/kernel/cpu/resctrl/core.c | 6 ++++--
> arch/x86/kernel/cpu/resctrl/monitor.c | 12 ++++--------
> arch/x86/kernel/cpu/resctrl/rdtgroup.c | 2 +-
> 3 files changed, 9 insertions(+), 11 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
> index c50f55d7790e..0828575c3e13 100644
> --- a/arch/x86/kernel/cpu/resctrl/core.c
> +++ b/arch/x86/kernel/cpu/resctrl/core.c
> @@ -591,11 +591,13 @@ static void domain_remove_cpu(int cpu, struct rdt_resource *r)
> return;
> }
>
> - if (r == &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl) {
> + if (r == &rdt_resources_all[RDT_RESOURCE_L3_MON].r_resctrl) {
> if (is_mbm_enabled() && cpu == d->mbm_work_cpu) {
> cancel_delayed_work(&d->mbm_over);
> mbm_setup_overflow_handler(d, 0);
> }
> + }
> + if (r == &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl) {
RDT_RESOURCE_L3_MON?
> if (is_llc_occupancy_enabled() && cpu == d->cqm_work_cpu &&
> has_busy_rmid(r, d)) {
> cancel_delayed_work(&d->cqm_limbo);
> @@ -826,7 +828,7 @@ static __init bool get_rdt_alloc_resources(void)
>
> static __init bool get_rdt_mon_resources(void)
> {
> - struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl;
> + struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_L3_MON].r_resctrl;
>
> if (rdt_cpu_has(X86_FEATURE_CQM_OCCUP_LLC))
> rdt_mon_features |= (1 << QOS_L3_OCCUP_EVENT_ID);
> diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
> index 3a6c069614eb..080cad0d7288 100644
> --- a/arch/x86/kernel/cpu/resctrl/monitor.c
> +++ b/arch/x86/kernel/cpu/resctrl/monitor.c
> @@ -268,7 +268,7 @@ int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain *d,
> */
> void __check_limbo(struct rdt_domain *d, bool force_free)
> {
> - struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl;
> + struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_L3_MON].r_resctrl;
> struct rmid_entry *entry;
> u32 crmid = 1, nrmid;
> bool rmid_dirty;
> @@ -333,7 +333,7 @@ int alloc_rmid(void)
>
> static void add_rmid_to_limbo(struct rmid_entry *entry)
> {
> - struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl;
> + struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_L3_MON].r_resctrl;
> struct rdt_domain *d;
> int cpu, err;
> u64 val = 0;
> @@ -623,7 +623,7 @@ void cqm_handle_limbo(struct work_struct *work)
>
> mutex_lock(&rdtgroup_mutex);
>
> - r = &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl;
> + r = &rdt_resources_all[RDT_RESOURCE_L3_MON].r_resctrl;
> d = container_of(work, struct rdt_domain, cqm_limbo.work);
>
> __check_limbo(d, false);
> @@ -659,7 +659,7 @@ void mbm_handle_overflow(struct work_struct *work)
> if (!static_branch_likely(&rdt_mon_enable_key))
> goto out_unlock;
>
> - r = &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl;
> + r = &rdt_resources_all[RDT_RESOURCE_L3_MON].r_resctrl;
> d = container_of(work, struct rdt_domain, mbm_over.work);
>
> list_for_each_entry(prgrp, &rdt_all_groups, rdtgroup_list) {
> @@ -736,10 +736,6 @@ static struct mon_evt mbm_local_event = {
>
> /*
> * Initialize the event list for the resource.
> - *
> - * Note that MBM events are also part of RDT_RESOURCE_L3 resource
> - * because as per the SDM the total and local memory bandwidth
> - * are enumerated as part of L3 monitoring.
> */
> static void l3_mon_evt_init(struct rdt_resource *r)
> {
> diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
> index aa24343f1d23..9ee3a9906781 100644
> --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
> +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
> @@ -2644,7 +2644,7 @@ static int rdt_get_tree(struct fs_context *fc)
> static_branch_enable_cpuslocked(&rdt_enable_key);
>
> if (is_mbm_enabled()) {
> - r = &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl;
> + r = &rdt_resources_all[RDT_RESOURCE_L3_MON].r_resctrl;
> list_for_each_entry(dom, &r->domains, list)
> mbm_setup_overflow_handler(dom, MBM_OVERFLOW_INTERVAL);
> }
--
Thanks
Babu Moger
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