From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752380AbbLIQ0Z (ORCPT ); Wed, 9 Dec 2015 11:26:25 -0500 Received: from g4t3425.houston.hp.com ([15.201.208.53]:42349 "EHLO g4t3425.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752254AbbLIQ0V (ORCPT ); Wed, 9 Dec 2015 11:26:21 -0500 From: Toshi Kani To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, bp@alien8.de Cc: stsp@list.ru, x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/2] Change PAT to support mremap use-cases Date: Wed, 9 Dec 2015 09:26:06 -0700 Message-Id: <1449678368-31793-1-git-send-email-toshi.kani@hpe.com> X-Mailer: git-send-email 2.4.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch-set fixes issues found in the pfn tracking code of PAT when mremap() is used on a VM_PFNMAP range. Patch 1/2 changes untrack_pfn() to handle the case of mremap() with MREMAP_FIXED, i.e. remapping virtual address on a VM_PFNMAP range. Patch 2/2 changes the free_memtype() path to handle the case of mremap() that shrinks the size of a VM_PFNMAP range. Note, mremap() to expand the size of a VM_PFNMAP range is not a valid case as VM_DONTEXPAND is set along with VM_PFNMAP. --- Toshi Kani (2): 1/2 x86/mm/pat: Change untrack_pfn() to handle unmapped vma 2/2 x86/mm/pat: Change free_memtype() to free shrinking range --- arch/x86/mm/pat.c | 19 ++++++++++++------- arch/x86/mm/pat_rbtree.c | 46 +++++++++++++++++++++++++++++++++++++--------- 2 files changed, 49 insertions(+), 16 deletions(-)