From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BD99DCFC518 for ; Sun, 23 Nov 2025 14:20:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CF9546B0023; Sun, 23 Nov 2025 09:20:09 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id CD1436B00A3; Sun, 23 Nov 2025 09:20:09 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C0DE46B00A5; Sun, 23 Nov 2025 09:20:09 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id A9B356B0023 for ; Sun, 23 Nov 2025 09:20:09 -0500 (EST) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 4E9AFB669F for ; Sun, 23 Nov 2025 14:20:09 +0000 (UTC) X-FDA: 84142081338.05.744046A Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf06.hostedemail.com (Postfix) with ESMTP id 930C0180008 for ; Sun, 23 Nov 2025 14:20:07 +0000 (UTC) Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=hbj1LkgM; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf06.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1763907607; a=rsa-sha256; cv=none; b=UpSG30pKBxqTvQqThW7PUUqH7Ew9zAVzYJyK0KnjXcjLqQwZydv46BI5Q1FXSgjeoU/3UP L9C0MK4rzlpySnqLSBwUk8+Fj+5f6v+5B/u99uRGuLgbLj24SJemHKKL5Z8zkgmODqW/gF TCARNh1EuidOhKdwQ528cNfVV6D6/rA= ARC-Authentication-Results: i=1; imf06.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=hbj1LkgM; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf06.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1763907607; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=kd+i/y4lRUeEe2vX993cUaAI51T+sV9btiar22RIqj4=; b=a4bslcE9eCezhi4eGvZUeYkASX/plgLRnqfCMpQrOIsbknw3VYgcrfL38nfEdowtS9jvYC QLeHfH2ObQTxmF5cZqfTE1qr1u3vhCCTcipEH0lp1cNlzi0pv6VPJemqENGciNGfpYtSRv wBC44+8gu99z5lJEyWlEvzef3/d4tGk= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 2E1E841B33; Sun, 23 Nov 2025 14:20:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F6C9C19421; Sun, 23 Nov 2025 14:19:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763907606; bh=64qKRjSfixLK9vi0MfPfl4EUkAb/R9lG3NziOFUwlpE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hbj1LkgM3jpINAAlPHZASq9E3rN1aUM0DEUqlztUnBTcbaIhVD5eucAidAB4gfABc Ib/eR9Q8tzeGw6sDgEvkL2B2/zkTWfjhmqk+7ZyH68Xbb1DS+tynJuS9mqdEBbbf4v av9ekCTiogcXBDCTmLSZPjlqmBa4qJFxmIprQYnor2Dfd/5TFyU9KRunnRPopVmGeG gpb1oBc8XkSK+NB6gJ+nJP8Gdawd4HCTlf+VbyUAsMpmj9ASWyh46Zc3etlr+NodPZ l0wLWZ7K50Y+YCRxWSjcr3VMVTEDGNMIUiWFXJGScmfzRyWPEnqc1rEJTmIEt++v8u nNVmbuEVxqR+A== Date: Sun, 23 Nov 2025 16:19:42 +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 v7 05/22] liveupdate: luo_core: add user interface Message-ID: References: <20251122222351.1059049-1-pasha.tatashin@soleen.com> <20251122222351.1059049-6-pasha.tatashin@soleen.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251122222351.1059049-6-pasha.tatashin@soleen.com> X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 930C0180008 X-Stat-Signature: tun6mq9yn4coa3h9j959ixduhwhagumr X-HE-Tag: 1763907607-329619 X-HE-Meta: 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 LUTYP0hC XNzG+R+6QazWP4j3dUQ/9XFxOcEJqAeS4EIs/wZVbJU8yhFINehb49CjSLW5QlWcHFZ1gfeArpFZ5IdMOQSOezv9w+ze/W/49iDliNpmLMRQ4Pv+IXkZ8HlgisDUxeZXAPx364uo6wpH3EojVRJZzOS45dJiJOTZ1ueOBusNHYvgWU3Vy7kYRR2WQpeTocIPEgbihYN4TcpVjxHV616ffmYow+J8bGIyjx7Vy0WlVXjm0JkYJykOktYPday+kkV8WXBFQoc/mOKNWcVzJ7O5y5HVRT2/rw9MIAs72cLv84c2s70VAQC1/PPUBVqOZCn0bPw1XzUQ9o+e/Z7tiDe+4g9nMjYamUCIL70P7U1ik6umBYCnpmSCoiVXLrEU59wKjNMae+PdVY6VoAkKwejr2TvpRnZck+LnERVgs+R/fz3l99PF6sxLsBXNtWtatPgF3XPLjdUnwQXBM+p8= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sat, Nov 22, 2025 at 05:23:32PM -0500, Pasha Tatashin wrote: > Introduce the user-space interface for the Live Update Orchestrator > via ioctl commands, enabling external control over the live update > process and management of preserved resources. > > The idea is that there is going to be a single userspace agent driving > the live update, therefore, only a single process can ever hold this > device opened at a time. > > The following ioctl commands are introduced: > > LIVEUPDATE_IOCTL_CREATE_SESSION > Provides a way for userspace to create a named session for grouping file > descriptors that need to be preserved. It returns a new file descriptor > representing the session. > > LIVEUPDATE_IOCTL_RETRIEVE_SESSION > Allows the userspace agent in the new kernel to reclaim a preserved > session by its name, receiving a new file descriptor to manage the > restored resources. > > Signed-off-by: Pasha Tatashin Reviewed-by: Mike Rapoport (Microsoft) > --- > include/uapi/linux/liveupdate.h | 64 +++++++++++ > kernel/liveupdate/luo_core.c | 179 ++++++++++++++++++++++++++++++- > kernel/liveupdate/luo_internal.h | 21 ++++ > 3 files changed, 263 insertions(+), 1 deletion(-) -- Sincerely yours, Mike.