From patchwork Tue Sep 4 11:45:33 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 145917 Delivered-To: patch@linaro.org Received: by 2002:a2e:1648:0:0:0:0:0 with SMTP id 8-v6csp3559729ljw; Tue, 4 Sep 2018 04:45:24 -0700 (PDT) X-Google-Smtp-Source: ANB0Vdb+p3dPX7rsi5NojkB2AcJNwVQtI07XOrMNaBCX9ur3FODnnBJh92xupZSEQReSvlJoypM/ X-Received: by 2002:a63:ee56:: with SMTP id n22-v6mr30952612pgk.402.1536061524380; Tue, 04 Sep 2018 04:45:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1536061524; cv=none; d=google.com; s=arc-20160816; b=yyKyjuxperfu+fmDu5lZJl/bBtE36WSiiP44SOQHVg2vb83DGowKhUQd4rbBWnE8es PLrkk0L/wzszWP+855+AcIWcxzmzQiq4G4mqrUQVYEEzd+o0lmV3Mk17cBv/cBiAuYz4 CihCAjCFkq/EhvdtFyQC+qWolb54eLSZUsJ30CHqGnCvTs3ls9j3J8uhpQZ2nOzdKt/i l/0YxDjTWkvbkg+llw2/I46bSfLLCat2YfW9ivV+ErOh13GGYSp9gvOI8MUyeLl86+cU AkAkSOgRyX6kJ+mOOHUmwS0t8dFnqVmnnmlR7knPDTlyHmfwGUQ3LOSDHFxNoboGzvX+ 7hQw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=aIicwUVftSNnfS4Gm1h09+G+H2qhLBZb+YIeh/Nh8pg=; b=PySO0XyFUeXaO7SgpXuf1cbclzGosC0Osi/Jgc2XhedjCCKoQTgO85Rv4l8FWKAnT7 SNySybCGOLW86rGorJUwHwfHICQBNrXEUlWH8fmdnM5YVAJHgGgQItDLMwIqbPAAFtpk uJE0nrQR/jZWbGHJ7LpAHksDqmW/9jA9za3tLcILyl/LLHxOqStdjRzbJT0MwxATq4z3 U9zTbkmncFOVOzDY9mwB2wmPpQR+lQ4XAjwqsHgpBiz4zo4U4MrOJy1zi8R7oLiYqmmT 6jStOMMGH6CxXeonpmGc5Rvm72oIBDVgSGqV2akeKQSChtiXgZqXplHhDNP1oGp+E/nv oz2A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 81-v6si24317279pfw.261.2018.09.04.04.45.24; Tue, 04 Sep 2018 04:45:24 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727255AbeIDQKH (ORCPT + 32 others); Tue, 4 Sep 2018 12:10:07 -0400 Received: from foss.arm.com ([217.140.101.70]:41344 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726087AbeIDQKG (ORCPT ); Tue, 4 Sep 2018 12:10:06 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 944571684; Tue, 4 Sep 2018 04:45:20 -0700 (PDT) Received: from edgewater-inn.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 66C8C3F5BC; Tue, 4 Sep 2018 04:45:20 -0700 (PDT) Received: by edgewater-inn.cambridge.arm.com (Postfix, from userid 1000) id C0F8F1AE3654; Tue, 4 Sep 2018 12:45:33 +0100 (BST) From: Will Deacon To: linux-kernel@vger.kernel.org Cc: peterz@infradead.org, npiggin@gmail.com, linux-mm@kvack.org, kirill.shutemov@linux.intel.com, akpm@linux-foundation.org, mhocko@suse.com, aneesh.kumar@linux.vnet.ibm.com Subject: [PATCH v2 5/5] MAINTAINERS: Add entry for MMU GATHER AND TLB INVALIDATION Date: Tue, 4 Sep 2018 12:45:33 +0100 Message-Id: <1536061533-16188-6-git-send-email-will.deacon@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1536061533-16188-1-git-send-email-will.deacon@arm.com> References: <1536061533-16188-1-git-send-email-will.deacon@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We recently had to debug a TLB invalidation problem on the munmap() path, which was made more difficult than necessary because: (a) The MMU gather code had changed without people realising (b) Many people subtly misunderstood the operation of the MMU gather code and its interactions with RCU and arch-specific TLB invalidation (c) Untangling the intended behaviour involved educated guesswork and plenty of discussion Hopefully, we can avoid getting into this mess again by designating a cross-arch group of people to look after this code. It is not intended that they will have a separate tree, but they at least provide a point of contact for anybody working in this area and can co-ordinate any proposed future changes to the internal API. Cc: Peter Zijlstra Cc: Nicholas Piggin Cc: Linus Torvalds Cc: "Aneesh Kumar K.V" Cc: "Kirill A. Shutemov" Cc: Andrew Morton Cc: Michal Hocko Signed-off-by: Will Deacon --- MAINTAINERS | 12 ++++++++++++ 1 file changed, 12 insertions(+) -- 2.1.4 diff --git a/MAINTAINERS b/MAINTAINERS index 9ad052aeac39..e490a0a0605a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9681,6 +9681,18 @@ S: Maintained F: arch/arm/boot/dts/mmp* F: arch/arm/mach-mmp/ +MMU GATHER AND TLB INVALIDATION +M: Will Deacon +M: "Aneesh Kumar K.V" +M: Nick Piggin +M: Peter Zijlstra +L: linux-arch@vger.kernel.org +L: linux-mm@kvack.org +S: Maintained +F: arch/*/include/asm/tlb.h +F: include/asm-generic/tlb.h +F: mm/mmu_gather.c + MN88472 MEDIA DRIVER M: Antti Palosaari L: linux-media@vger.kernel.org