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 52EF0489FB9; Mon, 28 Sep 2026 11:00:28 +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=1790593229; cv=none; b=qzEdG3noKwtezwOFXr3waiuX/UdHMrkGGy3Inxm0QZGtSAGp6ER6AzwOv5rUkn3T9UhkFnlZzpgcEOwiwSkpEDbNl1ODsMhGZHrKDvUsQU31OT5bPORwAmeyhHLOpVmMYkVSEwp0/HlDzqhj+L+LBzdLYcDHee4+Iqc5GGTIExg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790593229; c=relaxed/simple; bh=W/VZm44XzSsz564iDu6yls171Wz+1fQyfbWB7NPC/qE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mqaVoeRG720QyDOxYFGDbTXMwuN7oBJJusMVVNWmpwihjFAUBxl2gRZD/D1WxXsZzm6zAH847LYQt8jw7vKgjibb4fQtd68pWQ4oEquCcHJFMfWfDuyj5RRsm+lJNSOh3570zvGgMMv7nGSbxwvwofw4My1dq00SIvWEQRah9so= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YCMQw9cX; 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="YCMQw9cX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 852161F000FF; Mon, 28 Sep 2026 11:00:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790593227; bh=W/VZm44XzSsz564iDu6yls171Wz+1fQyfbWB7NPC/qE=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=YCMQw9cX13xqhIwBzSMliTFI1BR50NKpER6op4F/axoQCrr9l0XXf6aKT61a2MYnZ 5capFidkNb48gSEu2nhvuhjUmkOoDQEfunJtlKE33rLoPt/132APCimNjZZlyAnfGo BgCXLAb9ZOJGA+56e3kydME3r/Rqy83Tazx1Hgk12gMgLAooFzIbdO92+wgszDwoI7 0wcOm97VS0aIQkcxex3zRx0W1YJhM3LnzW3wvpPufqpPdX1MU9kssrpgnzzKDjtoez tU76c1ClWcl1zqN9EOl4Ujjk7ElqmJTjv6Z92YxS/B01A0Me3ruXGE38icwJuqHZhX mysf0URYpxqRw== Date: Mon, 28 Sep 2026 12:00:19 +0100 From: "Lorenzo Stoakes (ARM)" To: Johannes Berg Cc: Hajime Tazaki , linux-mm@kvack.org, liam@infradead.org, rbm@suse.com, akpm@linux-foundation.org, luto@amacapital.net, brendan.jackman@linux.dev, david@kernel.org, liuhangbin@gmail.com, corbet@lwn.net, kees@kernel.org, broonie@kernel.org, mhocko@suse.com, rppt@kernel.org, shuah@kernel.org, surenb@google.com, vbabka@kernel.org, wad@chromium.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-um@lists.infradead.org, geert@linux-m68k.org, daniel@thingy.jp Subject: Re: [PATCH v3 2/3] selftests: run tests on nommu architecture Message-ID: References: <20260926010819.604346-1-thehajime@gmail.com> <20260926010819.604346-3-thehajime@gmail.com> <04259a99ed91f8a527b255951a6f626310728170.camel@sipsolutions.net> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <04259a99ed91f8a527b255951a6f626310728170.camel@sipsolutions.net> On Mon, Sep 28, 2026 at 09:44:49AM +0200, Johannes Berg wrote: > On Sat, 2026-09-26 at 10:08 +0900, Hajime Tazaki wrote: > > Architectures lacks MMU doesn't support fork(2) syscall and only > > nit: Architectures lacking MMU don't support the fork(2) syscall ... > > Not sure where this should be merged? I guess selftests would make most > sense, but you can't actually test it out before the UML nommu changes, > so that doesn't work too well right now? I seem to recall Hajime saying he tested this on an actual nommu device/virtualised equivalent so nommu UML isn't strictly necessary (though very nice to have!) I think I saw something fly by that implied it might be coming in 7.4 is that so? :) > > johannes -- Cheers, Lorenzo