diff options
| author | Vikas Shivappa <vikas.shivappa@linux.intel.com> | 2017-07-25 14:14:47 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-08-01 22:41:29 +0200 |
| commit | e33026831bdb5f051499fec6a606f79fe1f94cc8 (patch) | |
| tree | 2a9b2e4425592ce74cb9a04cc1bdd8043d940838 /arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | |
| parent | a4de1dfdd726537e2a78b55759fc646d9b0a0be8 (diff) | |
x86/intel_rdt/mbm: Handle counter overflow
Set up a delayed work queue for each domain that will read all
the MBM counters of active RMIDs once per second to make sure
that they don't wrap around between reads from users.
[Tony: Added the initializations for the work structure and completed
the patch]
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ravi.v.shankar@intel.com
Cc: fenghua.yu@intel.com
Cc: peterz@infradead.org
Cc: eranian@google.com
Cc: vikas.shivappa@intel.com
Cc: ak@linux.intel.com
Cc: davidcc@google.com
Cc: reinette.chatre@intel.com
Link: http://lkml.kernel.org/r/1501017287-28083-29-git-send-email-vikas.shivappa@linux.intel.com
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt_rdtgroup.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c index 05088e301ef8..c24dd067b9c5 100644 --- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c +++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c @@ -1060,6 +1060,8 @@ static struct dentry *rdt_mount(struct file_system_type *fs_type, int flags, const char *unused_dev_name, void *data) { + struct rdt_domain *dom; + struct rdt_resource *r; struct dentry *dentry; int ret; @@ -1118,6 +1120,13 @@ static struct dentry *rdt_mount(struct file_system_type *fs_type, if (rdt_alloc_capable || rdt_mon_capable) static_branch_enable(&rdt_enable_key); + + if (is_mbm_enabled()) { + r = &rdt_resources_all[RDT_RESOURCE_L3]; + list_for_each_entry(dom, &r->domains, list) + mbm_setup_overflow_handler(dom); + } + goto out; out_mondata: |