mirror of https://github.com/torvalds/linux.git
acade63799
A warning as below may be occasionally triggered in an ADL machine when
these conditions occur:
- Two perf record commands run one by one. Both record a PEBS event.
- Both runs on small cores.
- They have different adaptive PEBS configuration (PEBS_DATA_CFG).
[ ] WARNING: CPU: 4 PID: 9874 at arch/x86/events/intel/ds.c:1743 setup_pebs_adaptive_sample_data+0x55e/0x5b0
[ ] RIP: 0010:setup_pebs_adaptive_sample_data+0x55e/0x5b0
[ ] Call Trace:
[ ] <NMI>
[ ] intel_pmu_drain_pebs_icl+0x48b/0x810
[ ] perf_event_nmi_handler+0x41/0x80
[ ] </NMI>
[ ] __perf_event_task_sched_in+0x2c2/0x3a0
Different from the big core, the small core requires the ACK right
before re-enabling counters in the NMI handler, otherwise a stale PEBS
record may be dumped into the later NMI handler, which trigger the
warning.
Add a new mid_ack flag to track the case. Add all PMI handler bits in
the struct x86_hybrid_pmu to track the bits for different types of
PMUs. Apply mid ACK for the small cores on an Alder Lake machine.
The existing hybrid() macro has a compile error when taking address of
a bit-field variable. Add a new macro hybrid_bit() to get the
bit-field value of a given PMU.
Fixes:
|
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|---|---|---|
| .. | ||
| Makefile | ||
| bts.c | ||
| core.c | ||
| cstate.c | ||
| ds.c | ||
| knc.c | ||
| lbr.c | ||
| p4.c | ||
| p6.c | ||
| pt.c | ||
| pt.h | ||
| uncore.c | ||
| uncore.h | ||
| uncore_discovery.c | ||
| uncore_discovery.h | ||
| uncore_nhmex.c | ||
| uncore_snb.c | ||
| uncore_snbep.c | ||