From patchwork Tue Dec 17 23:16:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mina Almasry X-Patchwork-Id: 11299065 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 87638921 for ; Tue, 17 Dec 2019 23:16:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6541C24650 for ; Tue, 17 Dec 2019 23:16:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="P7ONF3bS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726512AbfLQXQq (ORCPT ); Tue, 17 Dec 2019 18:16:46 -0500 Received: from mail-pl1-f202.google.com ([209.85.214.202]:39854 "EHLO mail-pl1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726695AbfLQXQc (ORCPT ); Tue, 17 Dec 2019 18:16:32 -0500 Received: by mail-pl1-f202.google.com with SMTP id p11so51218plo.6 for ; Tue, 17 Dec 2019 15:16:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=LHDNmvrc03db/XEfSOqoyXXNGP5IsSpxrj4BzR3DnFo=; b=P7ONF3bSi1FcEgzi06X5WCLKiiqJSe8dB1TLNvBuQJUGgAxF/cTHl3USj8SWYkK7CU RiIULrsrZzRQocm+xiOsv+X+B350gtTIq6mHJXIAu2pu2yV3cC7lM7t0ngoOfhrX2odq vWzPlPPWzONXKqSbb5wAFSrWehqaQtf9ElhAzgNItRhaqkPSRoXARql+KU4mQxqUjAYH 9flccmhgzpS613FCmu2ORYmtPsopWY13qVTTdlB5eItp8bQP9nfWoTEkstg0SEa+QqVT uRsku5nKBqGAbBT17asr8gYJDMAQhFvIIwA1p5Kjm77M4EqP/2TNYvxEsvMVpNjg1w/m trXA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=LHDNmvrc03db/XEfSOqoyXXNGP5IsSpxrj4BzR3DnFo=; b=BuSeuWTMDoKwjA8NUr98FSGDe93NA+UNHrZrl6SyHVQH13T7VqDA6hEbIwNQdTJTmz rDGxi4TlUeZURRtGC5tZj6gxWlI1/DC78ZZHUs+gagW+4PXmd/3yfayNUFhZ33qhHY+Z FN95Dmty7b7879pWbtfraaoEuBaZdPcOV4hhHvl1/q/mis3dd3Bj62G3j4P3bz+mI+d8 qMr4MBad9UJSKnwoSuv8BlfLgwiKFgAq5Jslbvv0hbjbWX6+cyl8JhOEDY4H6ZGjjFIk z75VR9Pjscu4aWwzjLPnC+noe/ATY5iZpR/yIPFZ6g8gCtmZas4Q5+7BnSjX4NzeQB9O 684A== X-Gm-Message-State: APjAAAXcJ83d2lo7NBjFPGBvk5MsUfhdJ1TS8yNNOfC/+X11nciO6M3D mVKH823M6EwDFOsXM6Ptz0DyoOO9KKVuxjCIyg== X-Google-Smtp-Source: APXvYqzQi/hTceVwH7B1vYFKo1hz5bRcGyNSFOmySOjm1oxr360S5O4JugN1EbS/KgVOxO0UVcreeR63ykX4ksyJag== X-Received: by 2002:a63:646:: with SMTP id 67mr435341pgg.150.1576624591531; Tue, 17 Dec 2019 15:16:31 -0800 (PST) Date: Tue, 17 Dec 2019 15:16:13 -0800 In-Reply-To: <20191217231615.164161-1-almasrymina@google.com> Message-Id: <20191217231615.164161-6-almasrymina@google.com> Mime-Version: 1.0 References: <20191217231615.164161-1-almasrymina@google.com> X-Mailer: git-send-email 2.24.1.735.g03f4e72817-goog Subject: [PATCH v9 6/8] hugetlb_cgroup: support noreserve mappings From: Mina Almasry To: mike.kravetz@oracle.com Cc: shuah@kernel.org, almasrymina@google.com, rientjes@google.com, shakeelb@google.com, gthelen@google.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, cgroups@vger.kernel.org, aneesh.kumar@linux.vnet.ibm.com, mkoutny@suse.com Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Support MAP_NORESERVE accounting as part of the new counter. For each hugepage allocation, at allocation time we check if there is a reservation for this allocation or not. If there is a reservation for this allocation, then this allocation was charged at reservation time, and we don't re-account it. If there is no reserevation for this allocation, we charge the appropriate hugetlb_cgroup. The hugetlb_cgroup to uncharge for this allocation is stored in page[3].private. We use new APIs added in an earlier patch to set this pointer. Signed-off-by: Mina Almasry --- mm/hugetlb.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) -- 2.24.1.735.g03f4e72817-goog diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 39eb2fa53a420..3e94f5c2d7cd4 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1367,6 +1367,9 @@ void free_huge_page(struct page *page) clear_page_huge_active(page); hugetlb_cgroup_uncharge_page(hstate_index(h), pages_per_huge_page(h), page, false); + hugetlb_cgroup_uncharge_page(hstate_index(h), pages_per_huge_page(h), + page, true); + if (restore_reserve) h->resv_huge_pages++; @@ -2189,10 +2192,19 @@ struct page *alloc_huge_page(struct vm_area_struct *vma, gbl_chg = 1; } + /* If this allocation is not consuming a reservation, charge it now. + */ + if (map_chg || avoid_reserve || !vma_resv_map(vma)) { + ret = hugetlb_cgroup_charge_cgroup(idx, pages_per_huge_page(h), + &h_cg, true); + if (ret) + goto out_subpool_put; + } + ret = hugetlb_cgroup_charge_cgroup(idx, pages_per_huge_page(h), &h_cg, false); if (ret) - goto out_subpool_put; + goto out_uncharge_cgroup_reservation; spin_lock(&hugetlb_lock); /* @@ -2216,6 +2228,14 @@ struct page *alloc_huge_page(struct vm_area_struct *vma, } hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), h_cg, page, false); + /* If allocation is not consuming a reservation, also store the + * hugetlb_cgroup pointer on the page. + */ + if (!vma_resv_map(vma) || map_chg || avoid_reserve) { + hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), h_cg, + page, true); + } + spin_unlock(&hugetlb_lock); set_page_private(page, (unsigned long)spool); @@ -2241,6 +2261,10 @@ struct page *alloc_huge_page(struct vm_area_struct *vma, out_uncharge_cgroup: hugetlb_cgroup_uncharge_cgroup(idx, pages_per_huge_page(h), h_cg, false); +out_uncharge_cgroup_reservation: + if (map_chg || avoid_reserve || !vma_resv_map(vma)) + hugetlb_cgroup_uncharge_cgroup(idx, pages_per_huge_page(h), + h_cg, true); out_subpool_put: if (map_chg || avoid_reserve) hugepage_subpool_put_pages(spool, 1);