Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932072AbYCZV0g (ORCPT ); Wed, 26 Mar 2008 17:26:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763253AbYCZV0G (ORCPT ); Wed, 26 Mar 2008 17:26:06 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:32995 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763226AbYCZV0E (ORCPT ); Wed, 26 Mar 2008 17:26:04 -0400 Message-ID: <47EABF75.9090605@linux.vnet.ibm.com> Date: Wed, 26 Mar 2008 16:26:13 -0500 From: Jon Tollefson Organization: IBM User-Agent: Thunderbird 2.0.0.12 (X11/20080227) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org, Linux Memory Management List , linuxppc-dev CC: Adam Litke , Andi Kleen , Paul Mackerras 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> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1575 Lines: 56 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) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/