From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 14967CA5FFF for ; Wed, 7 Oct 2026 02:31:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:MIME-Version: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=u9Jzggo5Sk1RIZ8WfB+NnbFsVZN8V/kovGtc4d+jfE4=; b=4FNtHcbzoJChCzCJRo39e6Djls keAD/B5noipVdv6xznLm8mvQePMihWPE8kJomwVWDCY8I43ZB5UAbqlxRrv88tMoyCT68zc02jky6 5uKx1xfx2rTQmbIHZAaacfohFJb2PBERyiuSpJa55FGdVznIqcvtKYAiFvwLT70CY7LRLOxUncKtY fU/LE9reX1npuE1UX+q4psggAPp0NT3+Cpwgr/rxdmBcGbfzGZe5eiAUb6DypHrD0mW0AJW2YoFM6 Gf8JlFdIojzXwJiDLfW3OTA24VVFO93lI8vwoL4GMLWfkL2V1oUK9ykrQLZIDJLNj/ZUHOqMicUoJ 7mFqGPgQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xEHQp-00000001e3C-01DR; Wed, 07 Oct 2026 02:30:59 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xEHQn-00000001e35-3JWJ for linux-um@lists.infradead.org; Wed, 07 Oct 2026 02:30:57 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id E0D62600C8; Wed, 7 Oct 2026 02:30:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 04BD71F0089B; Wed, 7 Oct 2026 02:30:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791340255; bh=u9Jzggo5Sk1RIZ8WfB+NnbFsVZN8V/kovGtc4d+jfE4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=J9Fpa3LcaeRJJ0NN9pOs90uK8L5DfSIm6mAjBw3gmroRxWWWbxFb2QBY7xicSVbTY kbT+6EbbrPeXqPTzIZSl5/gq1BAb/eOayV7XE6ey3RwmBfWTB/v8VEyyTyoAPPCrA0 cri8dcOXQ4A0qnYtSKy+NgeB4uPoFvN8orlfSO6E0eSFWRtrdwF2a402XVtWbKvh06 lRSjh3VEzncBxVqPnfDnS6lW0nafLoHm9hnGRK/TzY+qZEDFBRoQzJvP8LcOcuGEQ4 hQFNwpwttAKu5D3ATtRtUDpP6pXX3rhBtplR2oet7NU6iXQYKvGbkYwoqZeZiWZCOd Nvx4c87Puw11A== From: Masami Hiramatsu (Google) To: chuck@wolber.net Cc: Marco Elver , kasan-dev@googlegroups.com, nathan@kernel.org, akpm@linux-foundation.org, anton.ivanov@cambridgegreys.com, oberpar@linux.ibm.com, ardb@kernel.org, arnd@arndb.de, bhelgaas@google.com, bp@alien8.de, dave.hansen@linux.intel.com, dvyukov@google.com, hpa@zytor.com, jinghao7@illinois.edu, johannes@sipsolutions.net, jpoimboe@kernel.org, justinstitt@google.com, kees@kernel.org, kent.overstreet@linux.dev, linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-um@lists.infradead.org, llvm@lists.linux.dev, luto@kernel.org, marinov@illinois.edu, masahiroy@kernel.org, maskray@google.com, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, mingo@redhat.com, morbo@google.com, Nick Desaulniers , "Paul E. McKenney" , richard@nod.at, Steven Rostedt , samitolvanen@google.com, tglx@linutronix.de, tingxur@illinois.edu, tyxu@illinois.edu, wentaoz5@illinois.edu, x86@kernel.org, peterz@infradead.org, Sasha Levin , Aleksandr Nogikh , Taras Madan , Alexander Potapenko Subject: Re: [PROPOSAL] Replace gcov and kcov with llvm-cov Date: Wed, 07 Oct 2026 02:30:42 +0000 In-Reply-To: <41913a77-5c57-4967-8166-765dd5dde1bf@app.fastmail.com> References: 00ed0b57-ad05-4c5d-b152-7c81df94b23a@app.fastmail.com CANpmjNOaykC4McAj=gZghqPSQc9aGBP_CjgKmp3n2yjeJTxDSA@mail.gmail.com <41913a77-5c57-4967-8166-765dd5dde1bf@app.fastmail.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit MIME-Version: 1.0 Message-Id: <20261007023045.04BD71F0089B@smtp.kernel.org> X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" Errors-To: linux-um-bounces+linux-um=archiver.kernel.org@lists.infradead.org On Tue, 06 Oct 2026 16:27:11 +0000, Chuck Wolber wrote: > On Tue, Oct 6, 2026, at 4:10 PM, Marco Elver wrote: > > On Tue, 6 Oct 2026 at 17:14, Chuck Wolber wrote: > >> If there is a desire to take this in pieces or implement other > >> intermediate steps, let me know. Otherwise I can generate a > >> monolithic set all at once. > >> > >> [1] https://lore.kernel.org/lkml/20240905043245.1389509-1-wentaoz5@illinois.edu/ > > > > llvm-cov is generally useful to have; llvm-cov is closest to gcov, so > > that might make sense to replace. > > Swapping llvm-cov for gcov to start with is pretty straightforward, so I > can aim my initial patch set there. Hmm, is it necessary to remove gcov? Would it be difficult to simply add support for llvm-cov and enable (make kconfig selectable) one or the other depending on the compiler? Thanks, -- Masami Hiramatsu (Google)