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]) by smtp.lore.kernel.org (Postfix) with ESMTP id A29B0D78780 for ; Thu, 21 Nov 2024 15:38:09 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3FAE26B008C; Thu, 21 Nov 2024 10:38:09 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 384006B0092; Thu, 21 Nov 2024 10:38:09 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 224616B0093; Thu, 21 Nov 2024 10:38:09 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 037DD6B008C for ; Thu, 21 Nov 2024 10:38:08 -0500 (EST) Received: from smtpin14.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 9047580953 for ; Thu, 21 Nov 2024 15:38:08 +0000 (UTC) X-FDA: 82810507752.14.B5EBD7D Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf25.hostedemail.com (Postfix) with ESMTP id 97F79A0003 for ; Thu, 21 Nov 2024 15:37:28 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b="M/DBLHPF"; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf25.hostedemail.com: domain of jpoimboe@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=jpoimboe@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1732203419; a=rsa-sha256; cv=none; b=S5qIiuJKIlIKkO3xj9+BRus81lzeHvco8OJvdVVhAbbvGU5yYd1mEWR/03uOwg90VVQRe4 rUMEoabfqzmTSTcEjc/DxB+pEEKWwHapMaiomgMHDmPYmrkd/VcdMUw8l45MNKXBOpdd8G qJQaLZTic7sVhKxTKSoVE3DxqYIuyJA= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b="M/DBLHPF"; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf25.hostedemail.com: domain of jpoimboe@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=jpoimboe@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1732203419; 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=2RG9rhKQOlT26p9i0XdpwrSHrcQtJSMdgmrZYXjbovk=; b=aCa7civ+xAVqRM1vy0L1qi3PwVE6hlVQpMoATFC1Lk/TgQ5UNBuFVpPLWBW4mGz4f+J2lr Wrr4bk7xaQyErrqBmzJ93Ypd0ifnOme8HkGvX2NaELpPeNAak1irSz+qrwK509F6F6f591 m9KCmFyZZBeLHxKI4BH8RTDXDnhnu1I= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 9338C5C48D3; Thu, 21 Nov 2024 15:37:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26EE1C4CECC; Thu, 21 Nov 2024 15:38:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1732203485; bh=iMGDwYNrJI3EdUwArTwdQPBRSEQDPz1TvZbtZxtrmsQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=M/DBLHPFUgWRywDCFIXEK+SISpdl7LvUmwBPfH1doxqCCPPLV8yi72H7SxEGvNvd+ fSzIaQwKyP/xtQv6AuqkHTZyDEx5CScCQH6lWb8/9WKFdA4T8/TdmxYnor3vcKhXR1 AnUf3fE/FS5COU4mNH9kr3Um97kU+J+NqDplmdaQgU3u4nLBKFoNZapfxI5a0ikl3v c009KkvNpy26xZqxPkTpdOUE+LmDgvbgFsTJNpI8zeBo7prztovd9IItUNLaDtpgNP sbkH7NYSVvLtsPmTDxuM+Oq2h8LrMQ44oCpkmX3FSmL00J9k/NwBcV5ffTPKvat1QR u5busJkdRwLYA== Date: Thu, 21 Nov 2024 07:38:01 -0800 From: Josh Poimboeuf To: Peter Zijlstra Cc: Valentin Schneider , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, bpf@vger.kernel.org, x86@kernel.org, rcu@vger.kernel.org, linux-kselftest@vger.kernel.org, Steven Rostedt , Masami Hiramatsu , Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Paolo Bonzini , Wanpeng Li , Vitaly Kuznetsov , Andy Lutomirski , Frederic Weisbecker , "Paul E. McKenney" , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Andrew Morton , Uladzislau Rezki , Christoph Hellwig , Lorenzo Stoakes , Jason Baron , Kees Cook , Sami Tolvanen , Ard Biesheuvel , Nicholas Piggin , Juerg Haefliger , Nicolas Saenz Julienne , "Kirill A. Shutemov" , Nadav Amit , Dan Carpenter , Chuang Wang , Yang Jihong , Petr Mladek , "Jason A. Donenfeld" , Song Liu , Julian Pidancet , Tom Lendacky , Dionna Glaze , Thomas =?utf-8?Q?Wei=C3=9Fschuh?= , Juri Lelli , Marcelo Tosatti , Yair Podemsky , Daniel Wagner , Petr Tesarik Subject: Re: [RFC PATCH v3 06/15] jump_label: Add forceful jump label type Message-ID: <20241121153801.es5y72zjefzvbrnk@jpoimboe> References: <20241119153502.41361-1-vschneid@redhat.com> <20241119153502.41361-7-vschneid@redhat.com> <20241119233902.kierxzg2aywpevqx@jpoimboe> <20241120145649.GJ19989@noisy.programming.kicks-ass.net> <20241120145746.GL38972@noisy.programming.kicks-ass.net> <20241120165515.qx4qyenlb5guvmfe@jpoimboe> <20241121110020.GC24774@noisy.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20241121110020.GC24774@noisy.programming.kicks-ass.net> X-Rspam-User: X-Rspamd-Queue-Id: 97F79A0003 X-Rspamd-Server: rspam11 X-Stat-Signature: suhcqb38fic1cwe1d7f9ig4tiecyykfz X-HE-Tag: 1732203448-479133 X-HE-Meta: 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 rgU05tYE +5Hd+HxQxhQ08nApnLGya/gFzY7mJBr1RmQdAOSZYPXumXKifB96hDayWjOs+4CsrYxG0WU5Bc3YGggr5MwALgsiKjzOKQMganZIHppxT1QgQa+eKsr4pvC/XbjdHFMOGoiEGbPSSgKMhigb4UqvL8jYQWNIURRxmihFNd1UAeUiAvIquzHtZIpZpC1eWPDtq14JeEEmWWCyZGTqtgf5M/R1XsL0Dv9wxSkVk8YF2H8CaFpBlDRS63NtrzRETsIEfi6ViwAt1ziY3xRR3940zuTUA8WdL3r52Xo1lx06H4Eg79qJqRUiM6YgAC2YKH09N7jMgKl0eupXtmJfGnQ/ZF5WxTGpgo3Bg5khN39ncp7YmyjOiH+qAqKDXPUsifLd9DfA/rEBUWV1ECxly26y/citJ5vO2ZxsMmhL7kyc07NKD0pbhAoROKkcREyoXBdSpgyy2 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 Thu, Nov 21, 2024 at 12:00:20PM +0100, Peter Zijlstra wrote: > But yeah, this is not quite the same as not marking anything and simply > forcing the IPI when the target address is noinstr. > > And having written all that; perhaps that is the better solution, it > sticks the logic in text_poke and ensure it automagically work for all > its users, obviating the need for special marking. > > Is that what you were thinking? Yes, though I can't take credit for the idea as that's what I thought you were suggesting! That seems simpler and more bulletproof. -- Josh