Messages in this thread | | | From | Vince Weaver <> | Date | Tue, 12 Jul 2022 17:26:23 -0400 (EDT) | Subject | Re: [perf] unchecked MSR access error: WRMSR to 0x689 in intel_pmu_lbr_restore |
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On Tue, 12 Jul 2022, Pawan Gupta wrote:
> On Tue, Jul 12, 2022 at 03:39:56PM -0400, Vince Weaver wrote: > It appears this CPU does not support TSX feature (or disabling TSX). If > the bug is easy to reproduce, bisecting can help.
I thought TSX was disabled via firmware update for all Haswell machines?
In any case, the fuzzer is triggering the unchecked MSR access error: WRMSR to 0x689 in intel_pmu_lbr_restore. So either this is a false error and should be disabled, or else it's a real issue and should be fixed.
Unfortunately the fuzzer can take up to a few days to trigger the message (it's not easily repeatable) so doing a kernel bisect would take a very long time.
Vince
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