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 EC24430DEDC; Mon, 24 Nov 2025 14:57:55 +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=1763996276; cv=none; b=HiSLD5k26ktcGG8b/cURKsjWfjL0PQxmB6uuXKTVSZu9uycGOlBho6aRldwTdinb7o59YwH1SPOMenUiN+ERTHwtVJPHPzolEQY0k+YSlwQpUzPaA/R1eRE4O/AhRjyHS0cSwFwHZ0ulALJOqhnlDIYKx/bJiFWgVhBoF3/Cqww= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763996276; c=relaxed/simple; bh=eT4pJrflwgRPMF4ryE6lrh/N+OcL3X6tkjV48AA+6HI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=HGKLl8yfk7lPYBt+Tsad3SjhswUScvX9QtBuJIPZoFl3rnL9YMxA2PI7mJKoSBiSCDKqwzjuI0o/hr59wEHMJgsPnRwWHjpkGVGTL/BG3R8TvJtrHYrZf0O+ps0XsY4DtKhkB2J1ieQ8GyNjAFcblIUqTtLsQ8EZ28oTsLtlnFg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Yo98vvMZ; 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="Yo98vvMZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B5B8C4CEF1; Mon, 24 Nov 2025 14:57:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763996275; bh=eT4pJrflwgRPMF4ryE6lrh/N+OcL3X6tkjV48AA+6HI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=Yo98vvMZm/olLPqpxnPsvRURyK/2mRNeN/gLay7rE5jE+UrJoSq3l1gTUDijol2vR sTBC6XG3vdtj6VgW8PaH5OH2BDzAKQX0aG4V/3G8A8QI7mu1Z+GFyXK5+FOqp+/Zfr WhvErW8+LgmXEsRBaOewO3lQEgH594+zmhorrmc1Lj3BNCSUVI8PtG/9zDSMKmMpWh aGkZnmwGfxqEDUQx4p32IcugsCxlxtbiCRJHWSVA30dtIbZ/ImNdeJXs7fZ8y4b0x0 vJ+7C5GiMTHLP+I3Um/3AkDZvYkTgOuQWucN73eVWfujBPE0D1D1mUEHqoTBVasuVh 61m02b938kG6Q== From: Pratyush Yadav To: Pasha Tatashin Cc: pratyush@kernel.org, jasonmiu@google.com, graf@amazon.com, rppt@kernel.org, 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, 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 04/22] liveupdate: luo_session: add sessions support In-Reply-To: <20251122222351.1059049-5-pasha.tatashin@soleen.com> (Pasha Tatashin's message of "Sat, 22 Nov 2025 17:23:31 -0500") References: <20251122222351.1059049-1-pasha.tatashin@soleen.com> <20251122222351.1059049-5-pasha.tatashin@soleen.com> Date: Mon, 24 Nov 2025 15:57:45 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-api@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Sat, Nov 22 2025, Pasha Tatashin wrote: > Introduce concept of "Live Update Sessions" within the LUO framework. > LUO sessions provide a mechanism to group and manage `struct file *` > instances (representing file descriptors) that need to be preserved > across a kexec-based live update. > > Each session is identified by a unique name and acts as a container > for file objects whose state is critical to a userspace workload, such > as a virtual machine or a high-performance database, aiming to maintain > their functionality across a kernel transition. > > This groundwork establishes the framework for preserving file-backed > state across kernel updates, with the actual file data preservation > mechanisms to be implemented in subsequent patches. > > Signed-off-by: Pasha Tatashin With Mike's comments addressed, Reviewed-by: Pratyush Yadav [...] -- Regards, Pratyush Yadav