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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 78D1BCCA47F for ; Tue, 28 Jun 2022 22:09:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230212AbiF1WJq (ORCPT ); Tue, 28 Jun 2022 18:09:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37334 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229997AbiF1WJp (ORCPT ); Tue, 28 Jun 2022 18:09:45 -0400 Received: from mail-pl1-x64a.google.com (mail-pl1-x64a.google.com [IPv6:2607:f8b0:4864:20::64a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E75D2340EC for ; Tue, 28 Jun 2022 15:09:43 -0700 (PDT) Received: by mail-pl1-x64a.google.com with SMTP id l6-20020a170902ec0600b0016a1fd93c28so7631941pld.17 for ; Tue, 28 Jun 2022 15:09:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:message-id:mime-version:subject:from:to:cc; bh=j7vQtUkT6qRG3QKeX4UpMqnVZiZTqDS8DcvKPJ9fshM=; b=GzxwozEneycpYxfYkAxZnBbfe2kKbiWaUb3au/3inz+96+E7+zLStOmquVbMClhDJN mymnRTDsodttIg6bONJTV+Qf5sR0A/4Eufj9q5UkrnT+X4ZTX9KUSPZals5kueYPLHS3 5ZKToqFOZmswpxTUHknfNDUsMGF7F/uaQqn/NEHMx2U6nUHbDS6x4NydE1vgoQf5Vtt0 6DmHVpPjAhtY1SKXtzIeH1gmnX+GXgSguGwom5FHISPhcwC8dDainyvR7TPw7gTaHg5e aUNIUtPDYqw7Y7eMijqWWljoO7q9a0HYG+8ZpKEazP1QJOUU4M542v67wi7XPxaE8BoY dfHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=j7vQtUkT6qRG3QKeX4UpMqnVZiZTqDS8DcvKPJ9fshM=; b=fyXFTipOwZ8GWVShEk2QQDUQPAFwarubiec+Slxlwgtm0yXElMsQAtIAjlSuk4N7ct 4hqFQ/1/9Pe6iuQwFNIcaeWaQ1Aj7iAyg3rer56ZKn5AYtV3cGuT2pM0NUgJ5fhzuGFy 2HSdG+Nu5LRinGYsZ5O/WtFsK6k+D35o4CzjmmX3ZteVrWIG1R+PjPnCfcDtFp1nMafT iOWQFn+pBlx+K6X1joous0fzX764THCKRjoH8vUVg8nk/ub3dxxp/e6OF1D9z56dS4KL F8sUq1vJfZYMXycMWoiX2lpWxe+hSBnCYDrDVJRy/TtR5RnsCELA7znsTrjjDTSHkFiB zOJg== X-Gm-Message-State: AJIora9OpQwomvQzrY0ZQt0ugiokyP1UtJJBxkSUB0L2wAuP7i3o2udR YVQAjfmCiKYT+QospqgLN4+lUPPZP7sE6iKx X-Google-Smtp-Source: AGRyM1tAsY26pwu8BYVe36xK0WPC+OOzu0ciBh5fVZFr2DkYJV+K61VKlr8YtnVAaRLZuPtKG1T6lcJUgBOER+dp X-Received: from yosry.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:2327]) (user=yosryahmed job=sendgmr) by 2002:a17:902:d212:b0:16b:9cf9:6523 with SMTP id t18-20020a170902d21200b0016b9cf96523mr932471ply.33.1656454183407; Tue, 28 Jun 2022 15:09:43 -0700 (PDT) Date: Tue, 28 Jun 2022 22:09:34 +0000 Message-Id: <20220628220938.3657876-1-yosryahmed@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.37.0.rc0.161.g10f37bed90-goog Subject: [PATCH v6 0/4] KVM: mm: count KVM mmu usage in memory stats From: Yosry Ahmed To: Tejun Heo , Johannes Weiner , Zefan Li , Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Andrew Morton , Michal Hocko , Roman Gushchin , Shakeel Butt , Oliver Upton Cc: Huang@google.com, Shaoqin , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-mm@kvack.org, Yosry Ahmed Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add NR_SECONDARY_PAGETABLE memory stat and use it to account KVM mmu usage as the first type of accounted secondary page tables. This stat can be later extended to account for other types of secondary pages tables (e.g. iommu page tables). Rationale behind why this is useful and link to extended discussion in the first patch. --- Changes in V6: - Rebased on top of kvm/queue and fixed conflicts. - Fixed docs spaces and tabs (Sean). - More narrative commit logs (Sean and Oliver). - Updated kvm_account_pgtable_pages() documentation to describe the rules of using it more clearly (Sean). - Collected Acks and Reviewed-by's by Shakeel and Oliver (Thanks!) Changes in V5: - Updated cover letter to explain more the rationale behind the change (Thanks to contributions by Sean Christopherson). - Removed extraneous + in arm64 patch (Oliver Upton, Marc Zyngier). - Shortened secondary_pagetables to sec_pagetables (Shakeel Butt). - Removed dependency on other patchsets (applies to queue branch). Changes in V4: - Changed accounting hooks in arm64 to only account s2 page tables and refactored them to a much cleaner form, based on recommendations from Oliver Upton and Marc Zyngier. - Dropped patches for mips and riscv. I am not interested in those archs anyway and don't have the resources to test them. I posted them for completeness but it doesn't seem like anyone was interested. Changes in V3: - Added NR_SECONDARY_PAGETABLE instead of piggybacking on NR_PAGETABLE stats. Changes in V2: - Added accounting stats for other archs than x86. - Changed locations in the code where x86 KVM page table stats were accounted based on suggestions from Sean Christopherson. --- Yosry Ahmed (4): mm: add NR_SECONDARY_PAGETABLE to count secondary page table uses. KVM: mmu: add a helper to account memory used by KVM MMU. KVM: x86/mmu: count KVM mmu usage in secondary pagetable stats. KVM: arm64/mmu: count KVM s2 mmu usage in secondary pagetable stats Documentation/admin-guide/cgroup-v2.rst | 5 ++++ Documentation/filesystems/proc.rst | 4 +++ arch/arm64/kvm/mmu.c | 36 ++++++++++++++++++++++--- arch/x86/kvm/mmu/mmu.c | 16 +++++++++-- arch/x86/kvm/mmu/tdp_mmu.c | 12 +++++++++ drivers/base/node.c | 2 ++ fs/proc/meminfo.c | 2 ++ include/linux/kvm_host.h | 10 +++++++ include/linux/mmzone.h | 1 + mm/memcontrol.c | 1 + mm/page_alloc.c | 6 ++++- mm/vmstat.c | 1 + 12 files changed, 89 insertions(+), 7 deletions(-) -- 2.37.0.rc0.161.g10f37bed90-goog