From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e1.ny.us.ibm.com (e1.ny.us.ibm.com [32.97.182.141]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e1.ny.us.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id E0A66DE624 for ; Thu, 27 Mar 2008 08:26:02 +1100 (EST) Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e1.ny.us.ibm.com (8.13.8/8.13.8) with ESMTP id m2QLPxl3018071 for ; Wed, 26 Mar 2008 17:25:59 -0400 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m2QLPwxU200682 for ; Wed, 26 Mar 2008 17:25:58 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m2QLPw0c025924 for ; Wed, 26 Mar 2008 17:25:58 -0400 Message-ID: <47EABF75.9090605@linux.vnet.ibm.com> Date: Wed, 26 Mar 2008 16:26:13 -0500 From: Jon Tollefson MIME-Version: 1.0 To: linux-kernel@vger.kernel.org, Linux Memory Management List , linuxppc-dev Subject: [PATCH 2/4] powerpc: function for allocating gigantic pages References: <47EABE2D.7080400@linux.vnet.ibm.com> In-Reply-To: <47EABE2D.7080400@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1 Cc: Paul Mackerras , Andi Kleen , Adam Litke List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The 16G page locations have been saved during early boot in an array. The alloc_bm_huge_page() function adds a page from here to the huge_boot_pages list. Signed-off-by: Jon Tollefson --- hugetlbpage.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 94625db..31d977b 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -29,6 +29,10 @@ #define NUM_LOW_AREAS (0x100000000UL >> SID_SHIFT) #define NUM_HIGH_AREAS (PGTABLE_RANGE >> HTLB_AREA_SHIFT) +#define MAX_NUMBER_GPAGES 1024 + +static void *gpage_freearray[MAX_NUMBER_GPAGES]; +static unsigned nr_gpages; unsigned int hugepte_shift; #define PTRS_PER_HUGEPTE (1 << hugepte_shift) @@ -104,6 +108,21 @@ pmd_t *hpmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long addr) } #endif +/* Put 16G page address into temporary huge page list because the mem_map + * is not up yet. + */ +int alloc_bm_huge_page(struct hstate *h) +{ + struct huge_bm_page *m; + if (nr_gpages == 0) + return 0; + m = gpage_freearray[--nr_gpages]; + list_add(&m->list, &huge_boot_pages); + m->hstate = h; + return 1; +} + + /* Modelled after find_linux_pte() */ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) {