From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756673Ab1BAAe4 (ORCPT ); Mon, 31 Jan 2011 19:34:56 -0500 Received: from e34.co.us.ibm.com ([32.97.110.152]:38313 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756536Ab1BAAeH (ORCPT ); Mon, 31 Jan 2011 19:34:07 -0500 Subject: [RFC][PATCH 6/6] have smaps show transparent huge pages To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, Michael J Wolf , Andrea Arcangeli , Dave Hansen From: Dave Hansen Date: Mon, 31 Jan 2011 16:34:05 -0800 References: <20110201003357.D6F0BE0D@kernel> In-Reply-To: <20110201003357.D6F0BE0D@kernel> Message-Id: <20110201003405.FC58B813@kernel> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that the mere act of _looking_ at /proc/$pid/smaps will not destroy transparent huge pages, tell how much of the VMA is actually mapped with them. This way, we can make sure that we're getting THPs where we expect to see them. Signed-off-by: Dave Hansen --- linux-2.6.git-dave/fs/proc/task_mmu.c | 4 ++++ 1 file changed, 4 insertions(+) diff -puN fs/proc/task_mmu.c~teach-smaps-thp fs/proc/task_mmu.c --- linux-2.6.git/fs/proc/task_mmu.c~teach-smaps-thp 2011-01-31 16:25:15.948685305 -0800 +++ linux-2.6.git-dave/fs/proc/task_mmu.c 2011-01-31 16:25:34.600671992 -0800 @@ -331,6 +331,7 @@ struct mem_size_stats { unsigned long private_dirty; unsigned long referenced; unsigned long anonymous; + unsigned long anonymous_thp; unsigned long swap; u64 pss; }; @@ -394,6 +395,7 @@ static int smaps_pte_range(pmd_t *pmd, u spin_lock(&walk->mm->page_table_lock); goto normal_ptes; } + mss->anonymous_thp += HPAGE_SIZE; smaps_pte_entry(*(pte_t *)pmd, addr, HPAGE_SIZE, walk); return 0; } @@ -438,6 +440,7 @@ static int show_smap(struct seq_file *m, "Private_Dirty: %8lu kB\n" "Referenced: %8lu kB\n" "Anonymous: %8lu kB\n" + "AnonHugePages: %8lu kB\n" "Swap: %8lu kB\n" "KernelPageSize: %8lu kB\n" "MMUPageSize: %8lu kB\n" @@ -451,6 +454,7 @@ static int show_smap(struct seq_file *m, mss.private_dirty >> 10, mss.referenced >> 10, mss.anonymous >> 10, + mss.anonymous_thp >> 10, mss.swap >> 10, vma_kernel_pagesize(vma) >> 10, vma_mmu_pagesize(vma) >> 10, _