Commit 6fc3977c authored by Like Xu's avatar Like Xu Committed by Paolo Bonzini

KVM: x86/vPMU: refine kvm_pmu err msg when event creation failed

If a perf_event creation fails due to any reason of the host perf
subsystem, it has no chance to log the corresponding event for guest
which may cause abnormal sampling data in guest result. In debug mode,
this message helps to understand the state of vPMC and we may not
limit the number of occurrences but not in a spamming style.
Suggested-by: default avatarJoe Perches <joe@perches.com>
Signed-off-by: default avatarLike Xu <like.xu@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent d9847409
...@@ -131,8 +131,8 @@ static void pmc_reprogram_counter(struct kvm_pmc *pmc, u32 type, ...@@ -131,8 +131,8 @@ static void pmc_reprogram_counter(struct kvm_pmc *pmc, u32 type,
intr ? kvm_perf_overflow_intr : intr ? kvm_perf_overflow_intr :
kvm_perf_overflow, pmc); kvm_perf_overflow, pmc);
if (IS_ERR(event)) { if (IS_ERR(event)) {
printk_once("kvm_pmu: event creation failed %ld\n", pr_debug_ratelimited("kvm_pmu: event creation failed %ld for pmc->idx = %d\n",
PTR_ERR(event)); PTR_ERR(event), pmc->idx);
return; return;
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment