From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F21203D88FC; Thu, 4 Jun 2026 08:46:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780562813; cv=none; b=lSfgug6btvl90KAjBPFJ0g4UGuO7Iqaas0ODRwpY+qQITSemnWzbp4zZRG70quOCPg4nS0KNecynYpSRaxPgj4hZn1I60xE+fI3BAqP83JlUHbNkEnSc0Iq/8I3uOx19Gy0rvBqm0rJaGSUWGej8qrYUlI9hHXmOE+sK/YCYq5U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780562813; c=relaxed/simple; bh=7gcvKq4MneT/9HwdnQWZlTS8kTDFAW4V/FQknCdCgtc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=hd8puN3z3p10ZvV+u+oahXYOUxMuuOVQLvNKj7M4o/uvckXDXhlEpe5moB5MwIqhCBbF/EB7PR37Um/H4MHoWV2arUr9aop8mle1BDPPy42ZoPMYYWPzT4wjTf8YmqZ3juC6sOC+Jc8RZfmg1e9gBWtQNqTaRJ/+4aune4+CWr8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=pass smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=NWvi+i30; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="NWvi+i30" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=LsKVmAnm3ILB7WzqqyTBqPJ8q4JEg/9nOmZun/sFDtU=; b=NWvi+i300YMR8vDdnBWt9iIktx rF/OlgbcF8sDhsmWgnWmNNhUnxEau5Y1SGv4dMnk6oqLKS1feoNWHpB0lLWjFtyTXOj6X/87hanQ8 uquhXxhwwQ1E2JZ14LEb791FIXJO/HD7Mpv3vJnc2KCzyQjg8AhTUsgITZwAq2jw/JjK/EsBQBTrE Ng0taSt+RaWN5EQnqmrlTHPs2KK9TDXuL+6Q9t8DsAdZZZ62InRdpwdNHo6JPgodIZl4jGlYlhZrM t8MvDau5mSn5BMffXQ3L3wDAOhNBiOsixSHzmjGEPbfrRPfjCyH4H4vR/loes1JsI04d3C6RD/uri jRlLfpJQ==; Received: from 2001-1c00-8d85-4b00-266e-96ff-fe07-7dcc.cable.dynamic.v6.ziggo.nl ([2001:1c00:8d85:4b00:266e:96ff:fe07:7dcc] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.99.2 #2 (Red Hat Linux)) id 1wV3is-0000000E5W5-2Bg1; Thu, 04 Jun 2026 08:46:43 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id F1CCD3001FD; Thu, 04 Jun 2026 10:46:40 +0200 (CEST) Date: Thu, 4 Jun 2026 10:46:40 +0200 From: Peter Zijlstra To: Yunseong Kim Cc: Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Dmitry Vyukov , Andrey Konovalov , Andrew Morton , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Nicolas Schier , Miguel Ojeda , Boqun Feng , Gary Guo , =?iso-8859-1?Q?Bj=F6rn?= Roy Baron , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Jonathan Corbet , Shuah Khan , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, llvm@lists.linux.dev, linux-kbuild@vger.kernel.org, rust-for-linux@vger.kernel.org, workflows@vger.kernel.org, linux-doc@vger.kernel.org, Yunseong Kim Subject: Re: [RFC PATCH v2 3/6] kcov: add CONFIG_KCOV_DATAFLOW_INSTRUMENT_ALL and NO_INLINE Message-ID: <20260604084640.GB3126523@noisy.programming.kicks-ass.net> References: <20260603-kcov-dataflow-next-20260603-v2-0-fee0939de2c4@est.tech> <20260603-kcov-dataflow-next-20260603-v2-3-fee0939de2c4@est.tech> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260603-kcov-dataflow-next-20260603-v2-3-fee0939de2c4@est.tech> On Wed, Jun 03, 2026 at 07:43:30PM +0200, Yunseong Kim wrote: > diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug > index abd1a94589aa..3b952b6361a8 100644 > --- a/lib/Kconfig.debug > +++ b/lib/Kconfig.debug > @@ -2261,7 +2261,6 @@ config KCOV_SELFTEST > On test failure, causes the kernel to panic. Recommended to be > enabled, ensuring critical functionality works as intended. > > - > config KCOV_DATAFLOW_ARGS > bool "Enable KCOV dataflow: function argument capture" > depends on KCOV > @@ -2283,6 +2282,28 @@ config KCOV_DATAFLOW_RET > metadata, recording individual field values at runtime. > Enable per-module with: KCOV_DATAFLOW_file.o := y in the Makefile. > Requires clang with -fsanitize-coverage=dataflow-ret support. > + This goes into patch 1