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 E013313D51E; Sat, 11 Jul 2026 05:49:51 +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=1783748992; cv=none; b=Qg/PtH1ZVVx0KJ3fMKGgpMdg1e8E8deuIn3KcHaAKOTGpVldkySjnVFwr30Ju0LrISzTb+b84YYHNoIsCOH+LKUpa9Cwhhvnku14CnPq+7u9rxXs2bmpNel9QUfW5lZeY7VQljxhRe61uoTGzMazH03GAdNjwsju4rTZNHLZVEg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783748992; c=relaxed/simple; bh=KslYtVd6/FiSNgaU6k/vDiT76YGKqUbQU7/K1vnmVGs=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=d7GGkXSg8dBJJOigfZkRLU3oylpX7eUr9v7PPvB3IpVsjNFuhbYYtehCuPDXVsaxO4pRAGN/LDkdeyY62N4ELM/kTDxd6PLn/pxxPrggNVOShWgdlr3lGXTK3wYu6BRTYjisj9A9RcF/SVvUtm0t4RXCpAbj/VIjrzMjKSSLmsg= 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=kbiBT4UI; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="kbiBT4UI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77C7C1F000E9; Sat, 11 Jul 2026 05:49:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1783748991; bh=ORvew2lmZPoxsW3E1uuEKYOedhDenWUn2ruaSYxV7Zw=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=kbiBT4UI8EsOzp5Z6jcjE98+zJxsZeeKjK7DQ8Q28feKtSsl5P2ADzs/pTEcqC0/J QY82X8hqbvOUNwXy7z96UyQ9MiH9eTOe4kxzhnxuDvLyE2M7RAXChoKV7pn9eSdotM zjLpw7SDmjk5NIon4EHpDP7oKzGvYv+jnEP2DHoA= Date: Fri, 10 Jul 2026 22:49:50 -0700 From: Andrew Morton To: Stanislav Kinsburskii Cc: airlied@gmail.com, akhilesh@ee.iitb.ac.in, corbet@lwn.net, dakr@kernel.org, david@kernel.org, decui@microsoft.com, haiyangz@microsoft.com, jgg@ziepe.ca, kees@kernel.org, kys@microsoft.com, leon@kernel.org, liam@infradead.org, lizhi.hou@amd.com, ljs@kernel.org, longli@microsoft.com, lyude@redhat.com, maarten.lankhorst@linux.intel.com, mamin506@gmail.com, mhocko@suse.com, mripard@kernel.org, nouveau@lists.freedesktop.org, ogabbay@kernel.org, oleg@redhat.com, rppt@kernel.org, shuah@kernel.org, simona@ffwll.ch, skhan@linuxfoundation.org, surenb@google.com, tzimmermann@suse.de, vbabka@kernel.org, wei.liu@kernel.org, dri-devel@lists.freedesktop.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-rdma@vger.kernel.org Subject: Re: [PATCH v8 0/8] mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings Message-Id: <20260710224950.53bcb43ce7e564f07a1f6a8c@linux-foundation.org> In-Reply-To: References: <178371866223.900500.12312667138651735591.stgit@skinsburskii> <20260710151151.1e193eedd0cf2591ae392f76@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kselftest@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 Fri, 10 Jul 2026 20:22:33 -0700 Stanislav Kinsburskii wrote: > On Fri, Jul 10, 2026 at 03:11:51PM -0700, Andrew Morton wrote: > > On Fri, 10 Jul 2026 14:26:20 -0700 Stanislav Kinsburskii wrote: > > > > > This series extends the HMM framework to support userfaultfd-backed memory > > > by allowing the mmap read lock to be dropped during hmm_range_fault(). > > > > Thanks. This seems fairly mature and mostly-reviewed so I'll give it a > > spin in mm.git's mm-new branch. > > > > Unfortunately Sashiko wasn't able to apply this or v7. I'm not sure > > what base you were using. Hopefully there's a reason for a v9 so we > > can retry this. > > > > I rebased this series on top of mm-new right before sending it out. > Should I have used a different branch? mm-new is good - Sashiko attempts that. But it's changing rapidly at this point in the development cycle.