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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E2DAC636CB for ; Mon, 30 Jan 2023 17:50:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236754AbjA3RuQ (ORCPT ); Mon, 30 Jan 2023 12:50:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34304 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229694AbjA3RuO (ORCPT ); Mon, 30 Jan 2023 12:50:14 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D88A302A9; Mon, 30 Jan 2023 09:50:12 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1A34960F15; Mon, 30 Jan 2023 17:50:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 607D9C433D2; Mon, 30 Jan 2023 17:50:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1675101011; bh=1VBfxkrJ2jG7gVZ5bzrTzKycDwCYzooR1eYXc8bkWjQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=q4NwZmbm5DGxLaDRzc97uWryRvRm74rNOeUP4N3v/ZP6ca6IUz4i/YnNv+UDxzNxZ nuTWsPOSOWYUfNGv7pz6VCnBsDv7APDGoOn2fJo17ClkgCFA2zVbjr03EJbN3HLH04 uW49Vetpo5fANZiQBXTs1dxIro0eQm4DFSkvz90Yv31H34QkHusqSqk8JbVSOaKnUj a8n+JU8Nm6pZUIWGqqb5jv/pyd1eBA8PxyJiSmPCCguuZTyfC0YrynqVAkBs+pIEY1 R6cR7lfmD2H9h+DgY2WSqtRZ7UooQ9PtzLCW/m+Eks5xUhz9Elg8xiYwjYqUqdMbYs 5G+Rzv4T6R/AA== Date: Mon, 30 Jan 2023 11:50:10 -0600 From: Seth Forshee To: Peter Zijlstra Cc: Josh Poimboeuf , Petr Mladek , Joe Lawrence , kvm@vger.kernel.org, "Michael S. Tsirkin" , netdev@vger.kernel.org, Jiri Kosina , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, live-patching@vger.kernel.org, Miroslav Benes Subject: Re: [PATCH 0/2] vhost: improve livepatch switching for heavily loaded vhost worker kthreads Message-ID: References: <20230120-vhost-klp-switching-v1-0-7c2b65519c43@kernel.org> <20230127044355.frggdswx424kd5dq@treble> <20230127165236.rjcp6jm6csdta6z3@treble> <20230127170946.zey6xbr4sm4kvh3x@treble> <20230127221131.sdneyrlxxhc4h3fa@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jan 30, 2023 at 01:40:18PM +0100, Peter Zijlstra wrote: > Both ways this seems to make KLP 'depend' (or at least work lots better) > when PREEMPT_DYNAMIC=y. Do we want a PREEMPT_DYNAMIC=n fallback for > _cond_resched() too? I would like this, as we have no other need for PREEMPT_DYNAMIC=y and currently have it disabled. Thanks, Seth