Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753368AbbGIRE5 (ORCPT ); Thu, 9 Jul 2015 13:04:57 -0400 Received: from g4t3427.houston.hp.com ([15.201.208.55]:46040 "EHLO g4t3427.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751164AbbGIREu (ORCPT ); Thu, 9 Jul 2015 13:04:50 -0400 From: Toshi Kani To: hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com Cc: akpm@linux-foundation.org, bp@alien8.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org, jgross@suse.com, konrad.wilk@oracle.com, elliott@hp.com Subject: [PATCH 0/2] x86, mm: Fix PAT bit handling of large pages Date: Thu, 9 Jul 2015 11:03:49 -0600 Message-Id: <1436461431-27305-1-git-send-email-toshi.kani@hp.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 Content-Length: 1015 Lines: 27 The PAT bit gets relocated to bit 12 when PUD and PMD mappings are used. This bit 12, however, is not covered by PTE_FLAGS_MASK, which is corrently used for masking the flag bits for all cases. Patch 1/2 fixes pud_flags() and pmd_flags() to handle the PAT bit when PUD and PMD mappings are used. Patch 2/2 fixes /sys/kernel/debug/kernel_page_tables to show the PAT bit properly. Note, the PAT bit is first enabled in 4.2-rc1 with WT mappings. --- Toshi Kani (2): 1/2 x86: Fix pXd_flags() to handle _PAGE_PAT_LARGE 2/2 x86, mm: Fix page table dump to show PAT bit --- arch/x86/include/asm/pgtable_types.h | 16 ++++++++++++--- arch/x86/mm/dump_pagetables.c | 39 +++++++++++++++++++----------------- 2 files changed, 34 insertions(+), 21 deletions(-) -- 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/