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 X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2A38FC07542 for ; Mon, 27 May 2019 08:28:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EA5F32075B for ; Mon, 27 May 2019 08:28:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="O9OrxwRX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726581AbfE0I2r (ORCPT ); Mon, 27 May 2019 04:28:47 -0400 Received: from merlin.infradead.org ([205.233.59.134]:37438 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726453AbfE0I2r (ORCPT ); Mon, 27 May 2019 04:28:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=jG0YRiGucklvYuVZTJyB07fViGd1R8ZrnIAO0vccWRE=; b=O9OrxwRXfF/WgSylBbzJ1LWjx Dbva2fgoEgHFoIs/blL2hWLO+Wd0dbGyAlhWcE1e2FeYfCthkC74xYH0ovXWJYF76ag1YmEmZIwLP 10Ddi93cRD3B1F6FImnovzCk7EJGh1ZA/P3YqjHCDktoQFHJg3+2fkmfuJJEmhcAP80/GplsSyR+i K0Mbyrn2jDhanVU/eiLk9KAO7rie+PwX0U3O4vQTuzWJyIhojOsO6f4pI0s7TyAZhbQvuF2n7ZBne /CmBtru8IYlZj7FJPwT+VpJFDNYIQvT1eGZBphOB1dQ8NWi9Gl9DQiB54+n+joQmv5mfKbKyblk+a w44ehAJxw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hVAzn-0001QB-O9; Mon, 27 May 2019 08:28:40 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 211B820137ADA; Mon, 27 May 2019 10:28:36 +0200 (CEST) Date: Mon, 27 May 2019 10:28:36 +0200 From: Peter Zijlstra To: Nadav Amit Cc: Ingo Molnar , Andy Lutomirski , Borislav Petkov , linux-kernel@vger.kernel.org, Thomas Gleixner Subject: Re: [RFC PATCH 0/6] x86/mm: Flush remote and local TLBs concurrently Message-ID: <20190527082836.GQ2623@hirez.programming.kicks-ass.net> References: <20190525082203.6531-1-namit@vmware.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190525082203.6531-1-namit@vmware.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, May 25, 2019 at 01:21:57AM -0700, Nadav Amit wrote: > The proposed changes should also improve the performance of other > invocations of on_each_cpu(). Hopefully, no one has relied on the > behavior of on_each_cpu() that functions were first executed remotely > and only then locally. Oh gawd... I actually have vague memories of code doing exactly that, but I can't for the life of me remember where :/: