Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753229Ab1BVByI (ORCPT ); Mon, 21 Feb 2011 20:54:08 -0500 Received: from e7.ny.us.ibm.com ([32.97.182.137]:48448 "EHLO e7.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751343Ab1BVByF (ORCPT ); Mon, 21 Feb 2011 20:54:05 -0500 Subject: [PATCH 5/5] have smaps show transparent huge pages To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, Michael J Wolf , Andrea Arcangeli , akpm@osdl.org, Dave Hansen , Mel Gorman , Johannes Weiner , David Rientjes From: Dave Hansen Date: Mon, 21 Feb 2011 17:53:45 -0800 References: <20110222015338.309727CA@kernel> In-Reply-To: <20110222015338.309727CA@kernel> Message-Id: <20110222015345.BF949720@kernel> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2397 Lines: 65 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. v3 - * changed HPAGE_SIZE to HPAGE_PMD_SIZE, probably more correct and also has a nice BUG() in case there was a .config mishap * remove direct reference to ->page_table_lock, and used the passed-in ptl pointer insteadl Acked-by: Mel Gorman Acked-by: David Rientjes 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 2011-02-21 15:07:55.707591741 -0800 +++ linux-2.6.git-dave/fs/proc/task_mmu.c 2011-02-21 15:07:55.803594580 -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; }; @@ -396,6 +397,7 @@ static int smaps_pte_range(pmd_t *pmd, u smaps_pte_entry(*(pte_t *)pmd, addr, HPAGE_PMD_SIZE, walk); spin_unlock(&walk->mm->page_table_lock); + mss->anonymous_thp += HPAGE_PMD_SIZE; return 0; } } else { @@ -444,6 +446,7 @@ 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" @@ -457,6 +460,7 @@ 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, diff -puN include/linux/huge_mm.h~teach-smaps-thp include/linux/huge_mm.h diff -puN mm/memory-failure.c~teach-smaps-thp mm/memory-failure.c diff -puN mm/huge_memory.c~teach-smaps-thp mm/huge_memory.c _ -- 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/