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=-4.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no 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 D97D5C2D0C6 for ; Fri, 27 Dec 2019 16:36:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AAC5020CC7 for ; Fri, 27 Dec 2019 16:36:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577464581; bh=saOyowJ7uyY9gUuA6lkNUqoCxJUMqAWkV+VrH02LNAw=; h=From:To:Cc:Subject:Date:List-ID:From; b=hQibpDxYSnw+wBeX1gYwDth5aKYiIetCG9GwW3o5YuoCAqwf3SoYLtJ02MaRwSuCD D82Z1bsXRHdwqZfP+YfMkLOp292G4ZpaAkayrUvDRP+Q+XUuKHf3t3TZkpRLf8tejG YPtfu6zY6/L3BTJizLdi1S5mLIPH7kncHxUAnV9U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727111AbfL0QgU (ORCPT ); Fri, 27 Dec 2019 11:36:20 -0500 Received: from mail.kernel.org ([198.145.29.99]:46960 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726379AbfL0QgU (ORCPT ); Fri, 27 Dec 2019 11:36:20 -0500 Received: from lenoir.home (lfbn-ncy-1-150-155.w83-194.abo.wanadoo.fr [83.194.232.155]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1F2B1208C4; Fri, 27 Dec 2019 16:36:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577464579; bh=saOyowJ7uyY9gUuA6lkNUqoCxJUMqAWkV+VrH02LNAw=; h=From:To:Cc:Subject:Date:From; b=Wa3bfY+Gsu9wIHH2naA7mjTeUGL36HKsu1ayiq7zYYeHa9GBX7+y4ADhJAoxCSK1T YtZ/+r2PlMhx/578rf84OpGHQ4kNTcpe+CF1QrGHvfyhboLqu2r2rpyLQxCLuVhQBy T4GnwdqEv3J94Zch5nJUpHwGkXinrA2pw4qjTOZ0= From: Frederic Weisbecker To: linux-kernel@vger.kernel.org Cc: Frederic Weisbecker , Paolo Bonzini , Peter Zijlstra , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Wanpeng Li , Borislav Petkov , Thomas Gleixner , Sean Christopherson , Ingo Molnar , Jim Mattson , Joerg Roedel , Andy Lutomirski , Vitaly Kuznetsov Subject: [PATCH 0/2] x86/context-tracking: Remove last remaining calls to exception_enter/exception_exit() Date: Fri, 27 Dec 2019 17:36:10 +0100 Message-Id: <20191227163612.10039-1-frederic@kernel.org> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Thanks to the cleanups from Andy Lutomirski over the years, those calls can now be removed. This will allow for nice things in the future for x86 support on full nohz: * Remove TIF_NOHZ and use a per-cpu switch to enable, disable context tracking. * Avoid context tracking on housekeepers. * Dynamically enable/disable context tracking on CPU on runtime and therefore allow runtime enable/disable of nohz_full * Make nohz_full a property of cpuset. Frederic Weisbecker (2): x86/context-tracking: Remove exception_enter/exit() from do_page_fault() x86/context-tracking: Remove exception_enter/exit() from KVM_PV_REASON_PAGE_NOT_PRESENT async page fault arch/x86/kernel/kvm.c | 4 ---- arch/x86/mm/fault.c | 39 ++++++++++++--------------------------- 2 files changed, 12 insertions(+), 31 deletions(-) -- 2.23.0