diff options
| author | Tony Luck <tony.luck@intel.com> | 2025-12-17 09:21:10 -0800 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2026-01-09 23:36:41 +0100 |
| commit | f4e0cd80d3e7c31327459008b01d63804838a89d (patch) | |
| tree | 8a2e7d63741d3c35ed2a6cec91d146a0d07ded6b /fs/resctrl | |
| parent | 93d9fd89995181d7ff420752328cc8b4b228f100 (diff) | |
x86,fs/resctrl: Handle domain creation/deletion for RDT_RESOURCE_PERF_PKG
The L3 resource has several requirements for domains. There are per-domain
structures that hold the 64-bit values of counters, and elements to keep
track of the overflow and limbo threads.
None of these are needed for the PERF_PKG resource. The hardware counters
are wide enough that they do not wrap around for decades.
Define a new rdt_perf_pkg_mon_domain structure which just consists of the
standard rdt_domain_hdr to keep track of domain id and CPU mask.
Update resctrl_online_mon_domain() for RDT_RESOURCE_PERF_PKG. The only action
needed for this resource is to create and populate domain directories if a
domain is added while resctrl is mounted.
Similarly resctrl_offline_mon_domain() only needs to remove domain directories.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/20251217172121.12030-1-tony.luck@intel.com
Diffstat (limited to 'fs/resctrl')
| -rw-r--r-- | fs/resctrl/rdtgroup.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index 57139f9a30e7..b9363a938f74 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -4308,11 +4308,6 @@ void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_domain_hdr *h mutex_lock(&rdtgroup_mutex); - if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3)) - goto out_unlock; - - d = container_of(hdr, struct rdt_l3_mon_domain, hdr); - /* * If resctrl is mounted, remove all the * per domain monitor data directories. @@ -4320,6 +4315,13 @@ void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_domain_hdr *h if (resctrl_mounted && resctrl_arch_mon_capable()) rmdir_mondata_subdir_allrdtgrp(r, hdr); + if (r->rid != RDT_RESOURCE_L3) + goto out_unlock; + + if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3)) + goto out_unlock; + + d = container_of(hdr, struct rdt_l3_mon_domain, hdr); if (resctrl_is_mbm_enabled()) cancel_delayed_work(&d->mbm_over); if (resctrl_is_mon_event_enabled(QOS_L3_OCCUP_EVENT_ID) && has_busy_rmid(d)) { @@ -4416,6 +4418,9 @@ int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_domain_hdr *hdr mutex_lock(&rdtgroup_mutex); + if (r->rid != RDT_RESOURCE_L3) + goto mkdir; + if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3)) goto out_unlock; @@ -4433,6 +4438,8 @@ int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_domain_hdr *hdr if (resctrl_is_mon_event_enabled(QOS_L3_OCCUP_EVENT_ID)) INIT_DELAYED_WORK(&d->cqm_limbo, cqm_handle_limbo); +mkdir: + err = 0; /* * If the filesystem is not mounted then only the default resource group * exists. Creation of its directories is deferred until mount time |