Received: by 2002:a25:f815:0:0:0:0:0 with SMTP id u21csp2219761ybd; Mon, 24 Jun 2019 02:46:52 -0700 (PDT) X-Google-Smtp-Source: APXvYqyuFKUo7vp5mjU+gGss49Sfpa+E94SHzcy5NJN8ypUe9Sa43a1dYwag+0Gv/2Rdxv5qfard X-Received: by 2002:a63:fb17:: with SMTP id o23mr31736811pgh.362.1561369612547; Mon, 24 Jun 2019 02:46:52 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1561369612; cv=none; d=google.com; s=arc-20160816; b=fSu7S+WEfz3sojt8gzThoCWyXqKpr2ZLjGv4zgA55SYoCO7WVdXImGADFKwhS5MGJF Sh3+Bu7tXO6nAYaQtbHB4w98V5tZjWAnPLAb47jYHp3PrUcOIGxnX9QCvUpXg/Ggv4Be padWlFj7nh82mPCPPdJPlQt7anzxVLQbiDZ8RAbWt35bgdDoD/Y1bjvjcIYEudSetFNo uXZp0f4FDX6SFJx1MX44+xL95U4ke31DB4ugimxBvP/gTRz5lNvku45Vq3YwTmnoxmdZ BdaSY+EnoKtOY69TVASkyJ0gMLQOixZ7yuD3/uRLpIqIp90aR5iKT2FAFGCsXq3jjIj6 7huw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:message-id :in-reply-to:date:references:subject:cc:to:from; bh=DvyJmWsA+Bez3drAuEbCrS/zKncxLBLsEcv75/phoAw=; b=1IIvm+YRo3oVMdTx79ouuyFDAawPutsXjqsSosMl5Sw6DS6lcMQyus2SOe5eeHQyHk Oavh3iM4FIfjmKSL0HQcCKxjoK56BopjfIJ4AtTf3r0ZZH9fm8hLVrUR329VDvgo4WFk TTbTuUHzerDI7ELkVzwKKKlEMzNH5hyAv/cFrrGwWhWNv+D4YRsC3d+mlgFlyCdTsWHp gKfpqTQD3MtVgDhZVELcagd2F0Y1QxV+lL38+somREza7xzTemOz0BGCEHJL+8+baLxt bpEQtfAQllweJlWPc6QpabDzvVpxU5Gl8WA2zzHrRxYxXq/ezNr5Y+iOAmZgVIuwLYW6 dhPA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id q19si9185695pgv.31.2019.06.24.02.46.36; Mon, 24 Jun 2019 02:46:52 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727381AbfFXJ1h (ORCPT + 99 others); Mon, 24 Jun 2019 05:27:37 -0400 Received: from mx2.suse.de ([195.135.220.15]:53548 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726631AbfFXJ1g (ORCPT ); Mon, 24 Jun 2019 05:27:36 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 993F9AC66; Mon, 24 Jun 2019 09:27:35 +0000 (UTC) From: Nicolai Stange To: Petr Mladek Cc: Jiri Kosina , Josh Poimboeuf , Miroslav Benes , Joe Lawrence , Kamalesh Babulal , Nicolai Stange , live-patching@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC 0/5] livepatch: new API to track system state changes References: <20190611135627.15556-1-pmladek@suse.com> Date: Mon, 24 Jun 2019 11:27:34 +0200 In-Reply-To: <20190611135627.15556-1-pmladek@suse.com> (Petr Mladek's message of "Tue, 11 Jun 2019 15:56:22 +0200") Message-ID: <87o92n49kp.fsf@suse.de> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Petr, > this is another piece in the puzzle that helps to maintain more > livepatches. > > Especially pre/post (un)patch callbacks might change a system state. > Any newly installed livepatch has to somehow deal with system state > modifications done be already installed livepatches. > > This patchset provides, hopefully, a simple and generic API that > helps to keep and pass information between the livepatches. > It is also usable to prevent loading incompatible livepatches. I like it a lot, many thanks for doing this! Minor remarks/questions will follow inline. Nicolai