From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Aneesh Kumar K.V" Subject: Re: [PATCH 26/26] x86/mm: allow to have userspace mappings above 47-bits Date: Mon, 20 Mar 2017 10:40:20 +0530 Message-ID: <8760j4sfcz.fsf@skywalker.in.ibm.com> References: <20170313055020.69655-1-kirill.shutemov@linux.intel.com> <20170313055020.69655-27-kirill.shutemov@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <20170313055020.69655-27-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org To: Linus Torvalds , Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , Arnd Bergmann , "H. Peter Anvin" Cc: Andi Kleen , Dave Hansen , Andy Lutomirski , Michal Hocko , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" List-Id: linux-arch.vger.kernel.org "Kirill A. Shutemov" writes: @@ -168,6 +182,10 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, > unsigned long addr = addr0; > struct vm_unmapped_area_info info; > > + addr = mpx_unmapped_area_check(addr, len, flags); > + if (IS_ERR_VALUE(addr)) > + return addr; > + > /* requested length too big for entire address space */ > if (len > TASK_SIZE) > return -ENOMEM; > @@ -192,6 +210,14 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, > info.length = len; > info.low_limit = PAGE_SIZE; > info.high_limit = mm->mmap_base; > + > + /* > + * If hint address is above DEFAULT_MAP_WINDOW, look for unmapped area > + * in the full address space. > + */ > + if (addr > DEFAULT_MAP_WINDOW) > + info.high_limit += TASK_SIZE - DEFAULT_MAP_WINDOW; > + Is this ok for 32 bit application ? > info.align_mask = 0; > info.align_offset = pgoff << PAGE_SHIFT; > if (filp) { -aneesh -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:46082 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751106AbdCTFKd (ORCPT ); Mon, 20 Mar 2017 01:10:33 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v2K58q54103491 for ; Mon, 20 Mar 2017 01:10:32 -0400 Received: from e28smtp01.in.ibm.com (e28smtp01.in.ibm.com [125.16.236.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 299yqar7t5-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 20 Mar 2017 01:10:31 -0400 Received: from localhost by e28smtp01.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 20 Mar 2017 10:40:28 +0530 From: "Aneesh Kumar K.V" Subject: Re: [PATCH 26/26] x86/mm: allow to have userspace mappings above 47-bits In-Reply-To: <20170313055020.69655-27-kirill.shutemov@linux.intel.com> References: <20170313055020.69655-1-kirill.shutemov@linux.intel.com> <20170313055020.69655-27-kirill.shutemov@linux.intel.com> Date: Mon, 20 Mar 2017 10:40:20 +0530 MIME-Version: 1.0 Content-Type: text/plain Message-ID: <8760j4sfcz.fsf@skywalker.in.ibm.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: "Kirill A. Shutemov" , Linus Torvalds , Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , Arnd Bergmann , "H. Peter Anvin" Cc: Andi Kleen , Dave Hansen , Andy Lutomirski , Michal Hocko , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Message-ID: <20170320051020.daEAUbb82ZIJPDAXeMHjlwuz_GJLXjFCHOikQW0lZoQ@z> "Kirill A. Shutemov" writes: @@ -168,6 +182,10 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, > unsigned long addr = addr0; > struct vm_unmapped_area_info info; > > + addr = mpx_unmapped_area_check(addr, len, flags); > + if (IS_ERR_VALUE(addr)) > + return addr; > + > /* requested length too big for entire address space */ > if (len > TASK_SIZE) > return -ENOMEM; > @@ -192,6 +210,14 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, > info.length = len; > info.low_limit = PAGE_SIZE; > info.high_limit = mm->mmap_base; > + > + /* > + * If hint address is above DEFAULT_MAP_WINDOW, look for unmapped area > + * in the full address space. > + */ > + if (addr > DEFAULT_MAP_WINDOW) > + info.high_limit += TASK_SIZE - DEFAULT_MAP_WINDOW; > + Is this ok for 32 bit application ? > info.align_mask = 0; > info.align_offset = pgoff << PAGE_SHIFT; > if (filp) { -aneesh