From patchwork Tue Mar 26 16:47:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jerome Glisse X-Patchwork-Id: 10871631 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2417E186D for ; Tue, 26 Mar 2019 16:48:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0C6F128D00 for ; Tue, 26 Mar 2019 16:48:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F1BF928DC6; Tue, 26 Mar 2019 16:48:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7B44F28D5D for ; Tue, 26 Mar 2019 16:48:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732210AbfCZQs0 (ORCPT ); Tue, 26 Mar 2019 12:48:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45718 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732170AbfCZQsY (ORCPT ); Tue, 26 Mar 2019 12:48:24 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 268F483F3D; Tue, 26 Mar 2019 16:48:24 +0000 (UTC) Received: from localhost.localdomain.com (unknown [10.20.6.236]) by smtp.corp.redhat.com (Postfix) with ESMTP id B266717595; Tue, 26 Mar 2019 16:48:21 +0000 (UTC) From: jglisse@redhat.com To: linux-kernel@vger.kernel.org Cc: =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Andrew Morton , linux-mm@kvack.org, =?utf-8?q?Ch?= =?utf-8?q?ristian_K=C3=B6nig?= , Joonas Lahtinen , Jani Nikula , Rodrigo Vivi , Jan Kara , Andrea Arcangeli , Peter Xu , Felix Kuehling , Jason Gunthorpe , Ross Zwisler , Dan Williams , Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= , Michal Hocko , Ralph Campbell , John Hubbard , kvm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, Arnd Bergmann Subject: [PATCH v6 7/8] mm/mmu_notifier: pass down vma and reasons why mmu notifier is happening v2 Date: Tue, 26 Mar 2019 12:47:46 -0400 Message-Id: <20190326164747.24405-8-jglisse@redhat.com> In-Reply-To: <20190326164747.24405-1-jglisse@redhat.com> References: <20190326164747.24405-1-jglisse@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 26 Mar 2019 16:48:24 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jérôme Glisse CPU page table update can happens for many reasons, not only as a result of a syscall (munmap(), mprotect(), mremap(), madvise(), ...) but also as a result of kernel activities (memory compression, reclaim, migration, ...). Users of mmu notifier API track changes to the CPU page table and take specific action for them. While current API only provide range of virtual address affected by the change, not why the changes is happening This patch is just passing down the new informations by adding it to the mmu_notifier_range structure. Changes since v1: - Initialize flags field from mmu_notifier_range_init() arguments Signed-off-by: Jérôme Glisse Cc: Andrew Morton Cc: linux-mm@kvack.org Cc: Christian König Cc: Joonas Lahtinen Cc: Jani Nikula Cc: Rodrigo Vivi Cc: Jan Kara Cc: Andrea Arcangeli Cc: Peter Xu Cc: Felix Kuehling Cc: Jason Gunthorpe Cc: Ross Zwisler Cc: Dan Williams Cc: Paolo Bonzini Cc: Radim Krčmář Cc: Michal Hocko Cc: Christian Koenig Cc: Ralph Campbell Cc: John Hubbard Cc: kvm@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: linux-rdma@vger.kernel.org Cc: Arnd Bergmann Reviewed-by: Ira Weiny --- include/linux/mmu_notifier.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 62f94cd85455..0379956fff23 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -58,10 +58,12 @@ struct mmu_notifier_mm { #define MMU_NOTIFIER_RANGE_BLOCKABLE (1 << 0) struct mmu_notifier_range { + struct vm_area_struct *vma; struct mm_struct *mm; unsigned long start; unsigned long end; unsigned flags; + enum mmu_notifier_event event; }; struct mmu_notifier_ops { @@ -363,10 +365,12 @@ static inline void mmu_notifier_range_init(struct mmu_notifier_range *range, unsigned long start, unsigned long end) { + range->vma = vma; + range->event = event; range->mm = mm; range->start = start; range->end = end; - range->flags = 0; + range->flags = flags; } #define ptep_clear_flush_young_notify(__vma, __address, __ptep) \