From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail190.messagelabs.com (mail190.messagelabs.com [216.82.249.51]) by kanga.kvack.org (Postfix) with SMTP id 0FDCE6B00C0 for ; Thu, 21 Jan 2010 01:52:23 -0500 (EST) Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [PATCH 24 of 30] kvm mmu transparent hugepage support Message-Id: <060219444fc33e2c81fc.1264054848@v2.random> In-Reply-To: References: Date: Thu, 21 Jan 2010 07:20:48 +0100 From: Andrea Arcangeli Sender: owner-linux-mm@kvack.org To: linux-mm@kvack.org Cc: Marcelo Tosatti , Adam Litke , Avi Kivity , Izik Eidus , Hugh Dickins , Nick Piggin , Rik van Riel , Mel Gorman , Andi Kleen , Dave Hansen , Benjamin Herrenschmidt , Ingo Molnar , Mike Travis , KAMEZAWA Hiroyuki , Christoph Lameter , Chris Wright Dave Hansen , Andrew Morton List-ID: From: Marcelo Tosatti This should work for both hugetlbfs and transparent hugepages. Signed-off-by: Andrea Arcangeli Signed-off-by: Marcelo Tosatti --- diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -489,6 +489,15 @@ static int host_mapping_level(struct kvm out: up_read(¤t->mm->mmap_sem); + /* check for transparent hugepages */ + if (page_size == PAGE_SIZE) { + struct page *page = gfn_to_page(kvm, gfn); + + if (!is_error_page(page) && PageHead(page)) + page_size = KVM_HPAGE_SIZE(2); + kvm_release_page_clean(page); + } + for (i = PT_PAGE_TABLE_LEVEL; i < (PT_PAGE_TABLE_LEVEL + KVM_NR_PAGE_SIZES); ++i) { if (page_size >= KVM_HPAGE_SIZE(i)) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org