Messages in this thread Patch in this message |  | | From | Reinette Chatre <> | Subject | [PATCH V5 6/6] x86/intel_rdt: Re-enable pseudo-lock measurements | Date | Wed, 19 Sep 2018 10:29:11 -0700 |
| |
Commit 4a7a54a55e72 ("x86/intel_rdt: Disable PMU access") disabled measurements of pseudo-locked regions because of incorrect usage of the performance monitoring hardware.
Cache pseudo-locking measurements are now done correctly with the in-kernel perf API and its use can be re-enabled at this time.
The adjustment to the in-kernel perf API also separated the L2 and L3 measurements that can be triggered separately from user space. The re-enabling of the measurements is thus not a simple revert of the original disable in order to accommodate the additional parameter possible.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> --- arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c b/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c index c35b975e3b1e..edf30c94c226 100644 --- a/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c +++ b/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c @@ -1237,7 +1237,7 @@ static ssize_t pseudo_lock_measure_trigger(struct file *file, buf[buf_size] = '\0'; ret = kstrtoint(buf, 10, &sel); if (ret == 0) { - if (sel != 1) + if (sel != 1 && sel != 2 && sel != 3) return -EINVAL; ret = debugfs_file_get(file->f_path.dentry); if (ret) -- 2.17.0
|  |