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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4E827C41535 for ; Fri, 15 Dec 2023 15:16:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=IBBPKCAUYkHfYIvZ4nkiBnNV1Q28qCYeXjvBVOyxTCE=; b=PoMiaB5wTqfw+R Knjdl7dlb+SiQakoMBeauPPzUAXsvHt/5y6AfrgIQMlmnEgW0KPEykN9wHrr2qRsVsX+9ZNA0u6pz 3tM2a44NkZYXBp8FjasZI8HF6OrMo6ueqB4p3xCITENUcvq4OwdV9Ycb6OOapziTsOhzS3y9h4vnY ctxjADTVqXk+EPz81NK74K9VUh8LdVeukV/nlfXforZfDuBit2leeZfBmI+557IyX+ZgZGOAVsgkJ N4mhi99uHm1JJIvmKY46CVEPnha4kHXC+lKINyCyqZJBVSNJiyTr51YJAl/oKHRBCpGs0Gw0y2Bbe RPRoEhfJp6ZjYEHxAGww==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rE9uy-003hF6-0s; Fri, 15 Dec 2023 15:16:00 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rE9uv-003hCw-1H for linux-arm-kernel@lists.infradead.org; Fri, 15 Dec 2023 15:15:58 +0000 Received: from [192.168.4.26] (unknown [47.186.13.91]) by linux.microsoft.com (Postfix) with ESMTPSA id 31E8020B3CC2; Fri, 15 Dec 2023 07:15:53 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 31E8020B3CC2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1702653353; bh=TbbdfdN9F0xN9xrOOIN9kgjBMXwWRzLs8wobMZJ5G9w=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ZJmitctlicMc0n358JdynVujyRx8KAn3uE9xYYk/edA5anFQwi7Mk1mnplEaW6Dxo GyZNdp1Pqtq0FL20GrsS1CHIorRxueJdfaS7cPSyvY3nCdzlmkvZ4AKi74xlxMjrOP DndtXFw70MDLSdjfvoYF6c8lpW2s5GVkz7yPjv58= Message-ID: <8f3d6362-1513-45a9-9f56-f7ec4bff11a2@linux.microsoft.com> Date: Fri, 15 Dec 2023 09:15:52 -0600 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: ARM64 Livepatch based on SFrame To: Mark Rutland Cc: jpoimboe@redhat.com, peterz@infradead.org, chenzhongjin@huawei.com, broonie@kernel.org, nobuta.keiya@fujitsu.com, sjitindarsingh@gmail.com, catalin.marinas@arm.com, will@kernel.org, jamorris@linux.microsoft.com, linux-arm-kernel@lists.infradead.org, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org References: <0337266cf19f4c98388e3f6d09f590d9de258dc7> <20230202074036.507249-1-madvenka@linux.microsoft.com> <72364198-b031-4ecc-b337-d07db1b9d0c8@linux.microsoft.com> Content-Language: en-US From: "Madhavan T. Venkataraman" In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231215_071557_510060_74EE6EE9 X-CRM114-Status: GOOD ( 25.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 12/15/23 07:04, Mark Rutland wrote: > On Thu, Dec 14, 2023 at 02:49:29PM -0600, Madhavan T. Venkataraman wrote: >> Hi Mark, > > Hi Madhavan, > >> I attended your presentation in the LPC. You mentioned that you could use >> some help with some pre-requisites for the Livepatch feature. >> I would like to lend a hand. > > Cool! > > I've been meaning to send a mail round with a summary of the current state of > things, and what needs to be done going forward, but I haven't had the time > since LPC to put that together (as e.g. that requires learning some more about > SFrame). I'll be disappearing for the holiday shortly, and I intend to pick > that up in the new year. > >> What would you like me to implement? > > I'm not currently sure exactly what we need/want to implement, and as above I > think that needs to wait until the new year. > OK. > However, one thing that you can do that would be very useful is to write up and > report the GCC DWARF issues that you mentioned in: > > https://lore.kernel.org/linux-arm-kernel/20230202074036.507249-1-madvenka@linux.microsoft.com/ > > ... as (depending on exactly what those are) those could also affect SFrame > generation (and thus we'll need to get those fixed in GCC), and regardless it > would be useful information to know. > > I understood that you planned to do that from: > > https://lore.kernel.org/linux-arm-kernel/054ce0d6-70f0-b834-d4e5-1049c8df7492@linux.microsoft.com/ > > ... but I couldn't spot any relevant mails or issues in the GCC bugzilla, so > either I'm failing to search hard enough, or did that get forgotten about? > Yeah. I had notes on that. But I seem to have lost them. I need to reproduce the problems and analyze them again which is not trivial. So, I have been procrastinating. I am also disappearing for the rest of this year. I will try to look at it in the new year. >> I would also like to implement Unwind Hints for the feature. If you want a >> specific format for the hints, let me know. > > I will get back to you on that in the new year; I think the specifics we want > are going to depend on other details above we need to analyse first. > OK. For now, I will implement something and send it out just for reference. We can revisit this topic next year sometime. Thanks. Madhavan _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel