Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755818AbYLOOUW (ORCPT ); Mon, 15 Dec 2008 09:20:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754196AbYLOOS3 (ORCPT ); Mon, 15 Dec 2008 09:18:29 -0500 Received: from outbound-wa4.frontbridge.com ([216.32.181.16]:6763 "EHLO WA4EHSOBE006.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754180AbYLOOS2 (ORCPT ); Mon, 15 Dec 2008 09:18:28 -0500 X-BigFish: VPS3(zzzzzzz32i43j61h) X-Spam-TCS-SCL: 0:0 X-FB-SS: 5, X-WSS-ID: 0KBX92J-04-RHQ-01 From: Joerg Roedel To: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org CC: Joerg Roedel Subject: [PATCH 18/22] AMD IOMMU: add stats counter for cross-page request Date: Mon, 15 Dec 2008 15:18:01 +0100 Message-ID: <1229350685-3816-19-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.5.6.4 In-Reply-To: <1229350685-3816-1-git-send-email-joerg.roedel@amd.com> References: <1229350685-3816-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 15 Dec 2008 14:18:06.0432 (UTC) FILETIME=[F2EF8E00:01C95EBF] MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1422 Lines: 46 Impact: see number of requests for more than one page in debugfs Signed-off-by: Joerg Roedel --- arch/x86/kernel/amd_iommu.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index a00d20c..02e8c18 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -70,6 +70,7 @@ DECLARE_STATS_COUNTER(cnt_map_sg); DECLARE_STATS_COUNTER(cnt_unmap_sg); DECLARE_STATS_COUNTER(cnt_alloc_coherent); DECLARE_STATS_COUNTER(cnt_free_coherent); +DECLARE_STATS_COUNTER(cross_page); static struct dentry *stats_dir; static struct dentry *de_isolate; @@ -103,6 +104,7 @@ static void amd_iommu_stats_init(void) amd_iommu_stats_add(&cnt_unmap_sg); amd_iommu_stats_add(&cnt_alloc_coherent); amd_iommu_stats_add(&cnt_free_coherent); + amd_iommu_stats_add(&cross_page); } #endif @@ -1216,6 +1218,9 @@ static dma_addr_t __map_single(struct device *dev, pages = iommu_num_pages(paddr, size, PAGE_SIZE); paddr &= PAGE_MASK; + if (pages > 1) + INC_STATS_COUNTER(cross_page); + if (align) align_mask = (1UL << get_order(size)) - 1; -- 1.5.6.4 -- 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/