linux-kernel - Re: [PATCH v2 0/4] KCOV fixes

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Message-ID: <CACT4Y+Z=U+Y8gKBgaU76=zg=rAdq=AQ=epAq+RxDfdXsaqO_0w@mail.gmail.com>
Date: Tue, 11 Jun 2024 11:31:38 +0200
From: Dmitry Vyukov <dvyukov@...gle.com>
To: tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, 
	dave.hansen@...ux.intel.com, x86@...nel.org
Cc: linux-kernel@...r.kernel.org, syzkaller@...glegroups.com, elver@...gle.com, 
	glider@...gle.com, nogikh@...gle.com, tarasmadan@...gle.com
Subject: Re: [PATCH v2 0/4] KCOV fixes

On Tue, 11 Jun 2024 at 09:50, Dmitry Vyukov <dvyukov@...gle.com> wrote:
>
> Fix spurious KCOV coverage from interrupts and add a test.
> Ignore some additional files that lead to large amounts
> of uninteresting coverage.
> As a reference point, tracing a simple open system call
> produces ~10K PCs with these changes instead of ~45K PCs.
>
> Dmitry Vyukov (4):
>   x86/entry: Remove unwanted instrumentation in common_interrupt()
>   kcov: add interrupt handling self test
>   module: Fix KCOV-ignored file name
>   x86: Ignore stack unwinding in KCOV
>
>  arch/x86/include/asm/hardirq.h  |  8 ++++++--
>  arch/x86/include/asm/idtentry.h |  6 +++---
>  arch/x86/kernel/Makefile        |  8 ++++++++
>  kernel/kcov.c                   | 31 +++++++++++++++++++++++++++++++
>  kernel/module/Makefile          |  2 +-
>  lib/Kconfig.debug               |  8 ++++++++
>  6 files changed, 57 insertions(+), 6 deletions(-)
>
>
> base-commit: 83a7eefedc9b56fe7bfeff13b6c7356688ffa670
> --
> 2.45.2.505.gda0bf45e8d-goog

Thomas, Ingo, Borislav, Dave,

Can you take this via x86 tree please?