From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi1-f199.google.com (mail-oi1-f199.google.com [209.85.167.199]) by kanga.kvack.org (Postfix) with ESMTP id ED3BD6B0008 for ; Tue, 2 Oct 2018 08:15:46 -0400 (EDT) Received: by mail-oi1-f199.google.com with SMTP id v188-v6so1112516oie.3 for ; Tue, 02 Oct 2018 05:15:46 -0700 (PDT) Received: from foss.arm.com (foss.arm.com. [217.140.101.70]) by mx.google.com with ESMTP id q9-v6si123292otc.25.2018.10.02.05.15.45 for ; Tue, 02 Oct 2018 05:15:45 -0700 (PDT) From: Anshuman Khandual Subject: [PATCH 1/4] mm/hugetlb: Enable PUD level huge page migration Date: Tue, 2 Oct 2018 17:45:28 +0530 Message-Id: <1538482531-26883-2-git-send-email-anshuman.khandual@arm.com> In-Reply-To: <1538482531-26883-1-git-send-email-anshuman.khandual@arm.com> References: <1538482531-26883-1-git-send-email-anshuman.khandual@arm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: suzuki.poulose@arm.com, punit.agrawal@arm.com, will.deacon@arm.com, Steven.Price@arm.com, catalin.marinas@arm.com, mhocko@kernel.org, mike.kravetz@oracle.com, n-horiguchi@ah.jp.nec.com Architectures like arm64 have PUD level HugeTLB pages for certain configs (1GB huge page is PUD based on ARM64_4K_PAGES base page size) that can be enabled for migration. It can be achieved through checking for PUD_SHIFT order based HugeTLB pages during migration. Signed-off-by: Anshuman Khandual --- include/linux/hugetlb.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 6b68e34..9c1b77f 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -483,7 +483,8 @@ static inline bool hugepage_migration_supported(struct hstate *h) { #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION if ((huge_page_shift(h) == PMD_SHIFT) || - (huge_page_shift(h) == PGDIR_SHIFT)) + (huge_page_shift(h) == PUD_SHIFT) || + (huge_page_shift(h) == PGDIR_SHIFT)) return true; else return false; -- 2.7.4