From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 D37963FFF8E; Thu, 30 Jul 2026 14:43:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785422600; cv=none; b=rWE77CNdRk6f1DohwRLf1tnFY3URGi4nyrkgnHz9mkY/SpJFMvTvd4sEiMX114qPWPV9BUBXYnz33TjzsZqKkeA0g8IVmpSeL+QPj2rEXVw2IyuxBuASSU8VgkbEQN7PZIhveElHbnlXTIju42aPqhZKzs2g97bma98JQ/56GZU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785422600; c=relaxed/simple; bh=tXqG9H8+i2p9s8UvwsWdz1my5yh4Texr84kbljNu+og=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=UWN4NmPlUgMVkdtdyLq6NoSzt4vYlADWByB4VTqJfiZoNznn1DHdGCfRHQ2/N3u1FgAtOmhlCnTTgKsAqx86m95cV6dttRVSoVhigOzi7kvYgWcVIr067zWmW0mTrYHUzOeGalLMuPWV4Qyl/bpws6GnGWGZB5u+tzWGhR3tQdQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XWJLcZtt; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XWJLcZtt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 76C8E1F00A3D; Thu, 30 Jul 2026 14:43:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785422599; bh=6KQS35DzEabNwIcHWPyLhVv3cK2APUvpFW9vocbMRy0=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=XWJLcZttTcPRr/tQrWtKS/ixS1oQLP12Z++JvsU9aBW5rKURzD5Ekmk/1B63WvktM siWXFjI5LTBU3iW+soOHN4jQ3GEo86ben28Zy+SiVzK/N5GTmElg5oaIVuacsX1yzC P7TmmT3ZE6S7KIehA5igyuqyer9+mTya/z1vmCpPtFsdXysnyLSJBHQHsYjpc+TA20 e4qKfJNulaAm8pF+YBNK08CDFEXq/DN5lbVkzggvM5mIP2BVJkNYPqKz0O++rTtKqZ 9cL4D+dolutuIFHLZEbtHfAq40AOBsnluDJbdYGpQebJIlKOn87PcRjHtm8v2iI0en mTaCqkHXRfcJw== Message-ID: Date: Thu, 30 Jul 2026 16:43:12 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] selftests/mm: make libnuma-dependent tests optional To: Jiangshan Yi , akpm@linux-foundation.org, shuah@kernel.org Cc: ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, 13667453960@163.com References: <20260730142722.874189-1-yijiangshan@kylinos.cn> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 7/30/26 16:27, Jiangshan Yi wrote: > The mm selftests Makefile unconditionally builds three test binaries > that depend on libnuma (migration, ksm_tests, rmap). When libnuma-dev > is not installed, the build fails with a hard error, inconsistent with > how the optional liburing dependency is already handled via > check_config.sh. > > These three tests hard-depend on libnuma at both compile time > (#include ) and link time (-lnuma), confirmed by grepping all > .c files under tools/testing/selftests/mm/ for numa.h/numaif.h, which > matches exactly ksm_tests.c, migration.c, and rmap.c. Hi! IIRC, liburing was not universally easily available when we added these changes. libnuma is fairly old. (I might have added that :) ) So why should we bother about setups that don't just want to install libnuma + headers? The real motivation is lacking. -- Cheers, David