From patchwork Mon Oct 7 05:45:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 11176823 X-Patchwork-Delegate: paulburton@kernel.org 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 C8C161599 for ; Mon, 7 Oct 2019 05:45:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A75C121479 for ; Mon, 7 Oct 2019 05:45:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727234AbfJGFpk (ORCPT ); Mon, 7 Oct 2019 01:45:40 -0400 Received: from foss.arm.com ([217.140.110.172]:55286 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726889AbfJGFpk (ORCPT ); Mon, 7 Oct 2019 01:45:40 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C997E15AB; Sun, 6 Oct 2019 22:45:39 -0700 (PDT) Received: from p8cg001049571a15.blr.arm.com (p8cg001049571a15.blr.arm.com [10.162.40.136]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 9F30F3F68E; Sun, 6 Oct 2019 22:48:07 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org Cc: Anshuman Khandual , Andrew Morton , Vlastimil Babka , Greg Kroah-Hartman , Thomas Gleixner , Mike Rapoport , Mike Kravetz , Jason Gunthorpe , Dan Williams , Peter Zijlstra , Michal Hocko , Mark Rutland , Mark Brown , Steven Price , Ard Biesheuvel , Masahiro Yamada , Kees Cook , Tetsuo Handa , Matthew Wilcox , Sri Krishna chowdary , Dave Hansen , Russell King - ARM Linux , Michael Ellerman , Paul Mackerras , Martin Schwidefsky , Heiko Carstens , "David S. Miller" , Vineet Gupta , James Hogan , Paul Burton , Ralf Baechle , "Kirill A . Shutemov" , Gerald Schaefer , Christophe Leroy , linux-snps-arc@lists.infradead.org, linux-mips@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V4 1/2] mm/hugetlb: Make alloc_gigantic_page() available for general use Date: Mon, 7 Oct 2019 11:15:23 +0530 Message-Id: <1570427124-21887-2-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1570427124-21887-1-git-send-email-anshuman.khandual@arm.com> References: <1570427124-21887-1-git-send-email-anshuman.khandual@arm.com> Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org alloc_gigantic_page() implements an allocation method where it scans over various zones looking for a large contiguous memory block which could not have been allocated through the buddy allocator. A subsequent patch which tests arch page table helpers needs such a method to allocate PUD_SIZE sized memory block. In the future such methods might have other use cases as well. So alloc_gigantic_page() has been split carving out actual memory allocation method and made available via new alloc_gigantic_page_order(). Cc: Andrew Morton Cc: Vlastimil Babka Cc: Greg Kroah-Hartman Cc: Thomas Gleixner Cc: Mike Rapoport Cc: Mike Kravetz Cc: Jason Gunthorpe Cc: Dan Williams Cc: Peter Zijlstra Cc: Michal Hocko Cc: Mark Rutland Cc: Mark Brown Cc: Steven Price Cc: Ard Biesheuvel Cc: Masahiro Yamada Cc: Kees Cook Cc: Tetsuo Handa Cc: Matthew Wilcox Cc: Sri Krishna chowdary Cc: Dave Hansen Cc: Russell King - ARM Linux Cc: Michael Ellerman Cc: Paul Mackerras Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: "David S. Miller" Cc: Vineet Gupta Cc: James Hogan Cc: Paul Burton Cc: Ralf Baechle Cc: Kirill A. Shutemov Cc: Gerald Schaefer Cc: Christophe Leroy Cc: linux-snps-arc@lists.infradead.org Cc: linux-mips@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-ia64@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- include/linux/hugetlb.h | 9 +++++++++ mm/hugetlb.c | 24 ++++++++++++++++++++++-- 2 files changed, 31 insertions(+), 2 deletions(-) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 53fc34f930d0..cc50d5ad4885 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -299,6 +299,9 @@ static inline bool is_file_hugepages(struct file *file) } +struct page * +alloc_gigantic_page_order(unsigned int order, gfp_t gfp_mask, + int nid, nodemask_t *nodemask); #else /* !CONFIG_HUGETLBFS */ #define is_file_hugepages(file) false @@ -310,6 +313,12 @@ hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, return ERR_PTR(-ENOSYS); } +static inline struct page * +alloc_gigantic_page_order(unsigned int order, gfp_t gfp_mask, + int nid, nodemask_t *nodemask) +{ + return NULL; +} #endif /* !CONFIG_HUGETLBFS */ #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA diff --git a/mm/hugetlb.c b/mm/hugetlb.c index ef37c85423a5..3fb81252f52b 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1112,10 +1112,9 @@ static bool zone_spans_last_pfn(const struct zone *zone, return zone_spans_pfn(zone, last_pfn); } -static struct page *alloc_gigantic_page(struct hstate *h, gfp_t gfp_mask, +struct page *alloc_gigantic_page_order(unsigned int order, gfp_t gfp_mask, int nid, nodemask_t *nodemask) { - unsigned int order = huge_page_order(h); unsigned long nr_pages = 1 << order; unsigned long ret, pfn, flags; struct zonelist *zonelist; @@ -1151,6 +1150,14 @@ static struct page *alloc_gigantic_page(struct hstate *h, gfp_t gfp_mask, return NULL; } +static struct page *alloc_gigantic_page(struct hstate *h, gfp_t gfp_mask, + int nid, nodemask_t *nodemask) +{ + unsigned int order = huge_page_order(h); + + return alloc_gigantic_page_order(order, gfp_mask, nid, nodemask); +} + static void prep_new_huge_page(struct hstate *h, struct page *page, int nid); static void prep_compound_gigantic_page(struct page *page, unsigned int order); #else /* !CONFIG_CONTIG_ALLOC */ @@ -1159,6 +1166,12 @@ static struct page *alloc_gigantic_page(struct hstate *h, gfp_t gfp_mask, { return NULL; } + +struct page *alloc_gigantic_page_order(unsigned int order, gfp_t gfp_mask, + int nid, nodemask_t *nodemask) +{ + return NULL; +} #endif /* CONFIG_CONTIG_ALLOC */ #else /* !CONFIG_ARCH_HAS_GIGANTIC_PAGE */ @@ -1167,6 +1180,13 @@ static struct page *alloc_gigantic_page(struct hstate *h, gfp_t gfp_mask, { return NULL; } + +struct page *alloc_gigantic_page_order(unsigned int order, gfp_t gfp_mask, + int nid, nodemask_t *nodemask) +{ + return NULL; +} + static inline void free_gigantic_page(struct page *page, unsigned int order) { } static inline void destroy_compound_gigantic_page(struct page *page, unsigned int order) { }