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 69185350A15; Tue, 18 Nov 2025 11:28:27 +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=1763465307; cv=none; b=RBZMvy9JeT0J9nYJgSLhRDEZ90oIez6ruSW+8Fqu9YIbwA4I2jyIE0/drE8ZdBBj4n3s/cUSpwwgAVaFjfGaUovA81JeLxMMngNbbLxPSuxjsl9pyEEOb/m2iHVLVykImT2iUqEBBEGNufajWm6jQg4hKgi012Wjbz3J4Lni+Ao= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763465307; c=relaxed/simple; bh=B3Ck+ZeJMAqa97fGHBodXk952kfsyzlVaAaz1fhsUjU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=t8m4eQLQkVpwIcLgeqvfIUpWzJa+XJdEHnd6Ma5+966zU37kFXc3MpY+gBYzh/tA+Pwc+VvHffTY5c/Qa9fQO8z7Oq8tq1k1WG/u1k+PvNoTTvuYf4s3FiajWp3Nd14b1vNLf+BRAd8t7DYbAlAMgSpscyqLwNecIe8np4cjAUs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GQLu+9rZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="GQLu+9rZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DFA73C2BCB2; Tue, 18 Nov 2025 11:28:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763465306; bh=B3Ck+ZeJMAqa97fGHBodXk952kfsyzlVaAaz1fhsUjU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=GQLu+9rZRRAXOUo92WAJWcJwMQwCECdt5VEQNNd+yp5MfU6CT/SCqQGSMA1LzumqT NfCkJGz3WVbw4jmetvEnNdBIZtFyXHwH0Uv1STbCTH3FpF6egZEea/8IThMQV2AnE7 Xva49r63Ie+VmHsEwIVC3bWqvEFIsND9oBQ2SEDO0+Ttol+YON6Nqe0C0GMP8C0p/x nFs3/rjxgKCHsFSL3CWTeJs90Qo4ldWBUDxa8ow5mCspZWSwIXVih7aEib8XXJ+3jN 3u9YDrfXHY0BGetjelUPwh1a9YTF4bmTsULA+0awTrM4pf/hzkdGxtAY8qVHPr80PG yj/Y/ua4PKjzw== Date: Tue, 18 Nov 2025 13:28:00 +0200 From: Mike Rapoport To: Pasha Tatashin Cc: pratyush@kernel.org, jasonmiu@google.com, graf@amazon.com, dmatlack@google.com, rientjes@google.com, corbet@lwn.net, rdunlap@infradead.org, ilpo.jarvinen@linux.intel.com, kanie@linux.alibaba.com, ojeda@kernel.org, aliceryhl@google.com, masahiroy@kernel.org, akpm@linux-foundation.org, tj@kernel.org, yoann.congal@smile.fr, mmaurer@google.com, roman.gushchin@linux.dev, chenridong@huawei.com, axboe@kernel.dk, mark.rutland@arm.com, jannh@google.com, vincent.guittot@linaro.org, hannes@cmpxchg.org, dan.j.williams@intel.com, david@redhat.com, joel.granados@kernel.org, rostedt@goodmis.org, anna.schumaker@oracle.com, song@kernel.org, linux@weissschuh.net, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, gregkh@linuxfoundation.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, rafael@kernel.org, dakr@kernel.org, bartosz.golaszewski@linaro.org, cw00.choi@samsung.com, myungjoo.ham@samsung.com, yesanishhere@gmail.com, Jonathan.Cameron@huawei.com, quic_zijuhu@quicinc.com, aleksander.lobakin@intel.com, ira.weiny@intel.com, andriy.shevchenko@linux.intel.com, leon@kernel.org, lukas@wunner.de, bhelgaas@google.com, wagi@kernel.org, djeffery@redhat.com, stuart.w.hayes@gmail.com, ptyadav@amazon.de, lennart@poettering.net, brauner@kernel.org, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, saeedm@nvidia.com, ajayachandra@nvidia.com, jgg@nvidia.com, parav@nvidia.com, leonro@nvidia.com, witu@nvidia.com, hughd@google.com, skhawaja@google.com, chrisl@kernel.org Subject: Re: [PATCH v6 08/20] liveupdate: luo_flb: Introduce File-Lifecycle-Bound global state Message-ID: References: <20251115233409.768044-1-pasha.tatashin@soleen.com> <20251115233409.768044-9-pasha.tatashin@soleen.com> Precedence: bulk X-Mailing-List: linux-api@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, Nov 17, 2025 at 10:54:29PM -0500, Pasha Tatashin wrote: > > > > The concept makes sense to me, but it's hard to review the implementation > > without an actual user. > > There are three users: we will have HugeTLB support that is going to > be posted as RFC in a few weeks. Also, in two weeks we are going to > have an updated VFIO and IOMMU series posted both using FLBs. In the > mean time, this series provides an FLB in-kernel test that verifies > that multiple FLBs can be attached to File-Handlers, and the basic > interfaces are working. Which means that essentially there won't be a real kernel user for FLB for a while. We usually don't merge dead code because some future patchset depends on it. I think it should stay in mm-nonmm-unstable if Andrew does not mind keeping it there until the first user is going to land and then FLB will move upstream along with that user. If keeping FLB in mm tree is an issue we can set up an integration tree for LUO/KHO. -- Sincerely yours, Mike.