From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f198.google.com (mail-pf0-f198.google.com [209.85.192.198]) by kanga.kvack.org (Postfix) with ESMTP id 8AFB86B0279 for ; Fri, 2 Jun 2017 10:48:43 -0400 (EDT) Received: by mail-pf0-f198.google.com with SMTP id q27so76964523pfi.8 for ; Fri, 02 Jun 2017 07:48:43 -0700 (PDT) Received: from EUR01-HE1-obe.outbound.protection.outlook.com (mail-he1eur01on0091.outbound.protection.outlook.com. [104.47.0.91]) by mx.google.com with ESMTPS id y13si11946845pgs.86.2017.06.02.07.48.41 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 02 Jun 2017 07:48:41 -0700 (PDT) Subject: Re: [PATCHv6 06/10] x86/mm: Add sync_global_pgds() for configuration with 5-level paging References: <20170524095419.14281-1-kirill.shutemov@linux.intel.com> <20170524095419.14281-7-kirill.shutemov@linux.intel.com> From: Andrey Ryabinin Message-ID: <86bddb33-4f07-2949-256b-caf931df98d8@virtuozzo.com> Date: Fri, 2 Jun 2017 17:50:34 +0300 MIME-Version: 1.0 In-Reply-To: <20170524095419.14281-7-kirill.shutemov@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" Cc: Andi Kleen , Dave Hansen , Andy Lutomirski , Dan Williams , linux-mm@kvack.org, linux-kernel@vger.kernel.org On 05/24/2017 12:54 PM, Kirill A. Shutemov wrote: > This basically restores slightly modified version of original > sync_global_pgds() which we had before folded p4d was introduced. > > The only modification is protection against 'addr' overflow. > > Signed-off-by: Kirill A. Shutemov > --- > arch/x86/mm/init_64.c | 39 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 39 insertions(+) > > diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c > index 95651dc58e09..ce410c05d68d 100644 > --- a/arch/x86/mm/init_64.c > +++ b/arch/x86/mm/init_64.c > @@ -92,6 +92,44 @@ __setup("noexec32=", nonx32_setup); > * When memory was added make sure all the processes MM have > * suitable PGD entries in the local PGD level page. > */ > +#ifdef CONFIG_X86_5LEVEL > +void sync_global_pgds(unsigned long start, unsigned long end) > +{ > + unsigned long addr; > + > + for (addr = start; addr <= end; addr += ALIGN(addr + 1, PGDIR_SIZE)) { addr = ALIGN(addr + 1, PGDIR_SIZE) -- 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