linux-kernel - Re: [PATCH v2] x86: disable non-instrumented version of copy

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Message-ID: <Zeg0hpElT3TSZcNW@gmail.com>
Date: Wed, 6 Mar 2024 10:16:54 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc: LKML <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v2] x86: disable non-instrumented version of copy_mc when
 KMSAN is enabled


* Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp> wrote:

> Ping?
> 
> This is current top crasher.
> I hope this patch is applied before the merge window opens.

1) A false positive is not a 'crasher', it's a bug in instrumentation.

2) A false positive in intrusive instrumentation that top distributions do 
   not enable in their kernels has no immediate relevance to the timing of 
   the merge window.

Thanks,

	Ingo