From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 007BE40DFB5; Wed, 1 Apr 2026 20:27:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775075244; cv=none; b=rOiaRRD6CZT+9ovDCZsr8a4pILPaf+qa0gM+3nKuNigvXjytA4jqckWmF/seda8L8cquOfUo0sP9ALgaTOj8/IV5Awxaw9zt71GCp9xCkaZRAFIYgKJj0nS5qwwqmL11Qhi97Ar3KP2Lsb6BIDlo4jGHM+Sfg27RprWhq96rlLI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775075244; c=relaxed/simple; bh=OWtKm95laT3U6i3fhcBOR5W+DKz0FEB3jZZILO5nH8A=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=XpyZ3u1hGwVNXNi5NsWl4Hgpdx3HZWTxsm19jGC7fVqM6++p1VWO8Y48d7tgYjA6ax/Cc5ZG47Gu8wMOM9+dlxo+PFChWIXNIwXHZG9GyoVN89nJBQDdCsEAfWuveDJgyorry0I/aA6YQ2UQiofK+nGgMikFxWWjR9BIUUJxjBI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=Uws9wjJE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="Uws9wjJE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 94C92C4CEF7; Wed, 1 Apr 2026 20:27:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1775075243; bh=OWtKm95laT3U6i3fhcBOR5W+DKz0FEB3jZZILO5nH8A=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Uws9wjJE8a6LUlC1K75cOrahSIa88MlVL/cOcGuUfmc1fIrG9KUDszDZkHNbCl0c5 7fg+sHAYKj2SjgOTbgnX0K9/5vfXssNMrRMlEuipz5giV8UMy0BiZsnKd9TrQ7yX2U 0FS7eKqnC8rVi0MtpnmgZSNg+gx/mfFft9Y/l++c= Date: Wed, 1 Apr 2026 13:27:21 -0700 From: Andrew Morton To: Mark Brown Cc: Anthony Yznaga , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, david@kernel.org, ljs@kernel.org, Liam.Howlett@oracle.com, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jannh@google.com, pfalcato@suse.de, Jason@zx2c4.com, shuah@kernel.org Subject: Re: [PATCH v2 2/2] selftests/mm: verify droppable mappings cannot be locked Message-Id: <20260401132721.ef6c976eeb5e50b0cf6bb635@linux-foundation.org> In-Reply-To: References: <20260310155821.17869-1-anthony.yznaga@oracle.com> <20260310155821.17869-2-anthony.yznaga@oracle.com> <52bec9ea-5627-4ea2-8f27-f1729957fa47@sirena.org.uk> <20260331141714.b2f4e41b494060e55610a5f3@linux-foundation.org> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Wed, 1 Apr 2026 12:17:30 +0100 Mark Brown wrote: > On Tue, Mar 31, 2026 at 02:17:14PM -0700, Andrew Morton wrote: > > On Tue, 31 Mar 2026 14:17:50 +0100 Mark Brown wrote: > > > > All these failures which cause the entire test program to immediately > > > die seem exceessively strong... > > > Well, is the test code incorrect, or is the patch which it's testing > > incorrect? That's 5435ba164b0d ("mm: prevent droppable mappings from > > being locked")? > > I've done no investigation on the actual failure, sorry - the comment > above is a stylistic/usability one about the test program. Thanks. Anthony believes this is a problem in the test code, not in the kernel code which is being tested. He's working on the test code so I shall drop the current test code from mm.git't mm-stable tree. That's 6235dbcce97f ("selftests/mm: verify droppable mappings cannot be locked")