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 F0B993BB665; Mon, 1 Jun 2026 14:28:56 +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=1780324137; cv=none; b=Ov5CQhHMeQU8gorssuyrh0dO51ccep31Wg2U33btUPkm/1KnVytlOhwnXyiTT0RKGtlVt+25wVv2EaWRvQeoOqcf2R6lf6puPSwtvypJ7V/Bjg3v9h+K+fvW54RKw7egPxMf89D069QlsKzNafXmrKsVBilDkxtUpT61xUMlybY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780324137; c=relaxed/simple; bh=8/ca+0M4SBA42pS5FYJaE05C0A9HuumcGZpX/LoJbSY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=o3W1u9XaGvnL2g8wg99JuBDpaM8ka+cxVXd21cdfYYT49ARxYGhLOStNIey9V4o54JVU6QiNYDVd63gjZq8zf0B/OSg5u3li+iSoxWeu0ACTDqIJAelOKhxjv1lClEccuS4/bt4Ofi+6N/Ca9mDkk3qRvWnAj/qiSHA4peA4CIY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MFBQ3wnU; 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="MFBQ3wnU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B6321F00893; Mon, 1 Jun 2026 14:28:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780324136; bh=QcytDXYzPwKDUDdHT+N4i8ojI54d4gwtkmZUP60KdkM=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=MFBQ3wnUVZEzgVXBP7n6BLHSXSE0qD9Bm7vwoXNVZtdHWBlM9NTq0i+K9RQXuhWw9 mBZioXbaFvlvWuL3ExgLdSna7SwlLK2S8Qy1eI6fmf7bFYCb2kPhK2H7MGPfkRbcWk R1q8n30NM6cuQZA09wD2pSFpVduh/yZgcmHrKV7JBRTpa+YrDoE/bKJ2AOHrTpFQYT dFsQTkYS0tr4YjM0Ge0bCWiaErT/4amvCgJjqwaNBn6asSlXPArhxDM1uDzTAst/Pz u7c9uwrYL4zA9u3HHEHZGX29EjtDsaOPQmZxaR8BcGfuodvdzymTg8ObRVJENl1as/ 6sORXGX2T0SjA== Date: Mon, 1 Jun 2026 17:28:45 +0300 From: Mike Rapoport To: Kiryl Shutsemau Cc: Lorenzo Stoakes , akpm@linux-foundation.org, peterx@redhat.com, david@kernel.org, surenb@google.com, vbabka@kernel.org, Liam.Howlett@oracle.com, ziy@nvidia.com, corbet@lwn.net, skhan@linuxfoundation.org, seanjc@google.com, pbonzini@redhat.com, jthoughton@google.com, aarcange@redhat.com, sj@kernel.org, usama.arif@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, kvm@vger.kernel.org, kernel-team@meta.com, stable@vger.kernel.org Subject: Re: [PATCH v5 04/18] mm: skip out-of-range bits in mk_vma_flags() Message-ID: References: <20260526130509.2748441-1-kirill@shutemov.name> <20260526130509.2748441-5-kirill@shutemov.name> 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: On Mon, Jun 01, 2026 at 03:08:19PM +0100, Kiryl Shutsemau wrote: > On Sat, May 30, 2026 at 07:52:25PM +0300, Mike Rapoport wrote: > > I have a PoC of yet another alternative: > > > > https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git/log/?h=uffd/vm-flags > > > > The idea there is to keep a single VMA flag, VMA_UFFD_BIT/VM_UFFD and move > > all the rest into what's now struct vm_userfaultfd_ctx. > > Nice! > > I assume it can go on top what I did, right? Yes, it's already on top of a previous version of RWP. > -- > Kiryl Shutsemau / Kirill A. Shutemov -- Sincerely yours, Mike.