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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 A7CC3C4321D for ; Wed, 22 Aug 2018 22:11:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B2BF208D9 for ; Wed, 22 Aug 2018 22:11:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B2BF208D9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726848AbeHWBhy (ORCPT ); Wed, 22 Aug 2018 21:37:54 -0400 Received: from shelob.surriel.com ([96.67.55.147]:59706 "EHLO shelob.surriel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726396AbeHWBhy (ORCPT ); Wed, 22 Aug 2018 21:37:54 -0400 Received: from imladris.surriel.com ([96.67.55.152]) by shelob.surriel.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1fsbLD-0007vW-9Z; Wed, 22 Aug 2018 18:11:03 -0400 Message-ID: <15474e3aa44fe9f67b6fa6ddb67ff8fc0e6831ad.camel@surriel.com> Subject: Re: [PATCH 1/4] x86/mm/tlb: Revert the recent lazy TLB patches From: Rik van Riel To: Linus Torvalds , Peter Zijlstra Cc: Andrew Lutomirski , the arch/x86 maintainers , Borislav Petkov , Will Deacon , Jann Horn , Adin Scannell , Dave Hansen , Linux Kernel Mailing List , linux-mm Date: Wed, 22 Aug 2018 18:11:02 -0400 In-Reply-To: References: <20180822153012.173508681@infradead.org> <20180822154046.717610121@infradead.org> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-hz++tz2+IaVsyr5y/rZl" X-Mailer: Evolution 3.28.5 (3.28.5-1.fc28) Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-hz++tz2+IaVsyr5y/rZl Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2018-08-22 at 14:37 -0700, Linus Torvalds wrote: > On Wed, Aug 22, 2018 at 8:46 AM Peter Zijlstra > wrote: > >=20 > > Revert [..] in order to simplify the TLB invalidate fixes for x86. > > We'll try again later. >=20 > Rik, I assume I should take your earlier "yeah, I can try later" as > an > ack for this? Yes, feel free to add my Acked-by: to all these patches. Patch 3/4 is not ideal, with the slow path in tlb_remove_table sending two IPIs (one to every CPU, one to the CPUs in the mm_cpumask), but that is a slow path we should not be hitting much anyway. --=20 All Rights Reversed. --=-hz++tz2+IaVsyr5y/rZl Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEKR73pCCtJ5Xj3yADznnekoTE3oMFAlt933YACgkQznnekoTE 3oOMsAf/RJSe6V5kEnd6+uZ0fO6hjLhBKFelbSOom6tOoNv9xYtJb9aJY3dxw32J 5JBt5ihzQ2dGvSshTNYGY3okOXuq4gy46TrYGr7MS41yuHGEgBB/j8+48fWTGdAe LzNXHGJ31Q+MACbk1MeHYAMvsWk32ri1u9sVelp3Cw3A/eACUsGaR8O0yC2zL/nJ NZLofB9ceux/wnz+tg4wtubCE2AyirjJFmSTPjlbMhUeEEbkqp1B2UB7tBxwpKDl buFJym74wL4KTMaxWH5dFEpVHolTSsFrdU+EdnDFSuP/LPMdJVo4CHxlGIWaUaEw 2l6Xqy7sF1U9kFT1azCKO2LzfHrdJQ== =jSan -----END PGP SIGNATURE----- --=-hz++tz2+IaVsyr5y/rZl--