From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754211AbdBNThX (ORCPT ); Tue, 14 Feb 2017 14:37:23 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:48844 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752277AbdBNTgQ (ORCPT ); Tue, 14 Feb 2017 14:36:16 -0500 Smtp-Origin-Hostprefix: devbig From: Shaohua Li Smtp-Origin-Hostname: devbig638.prn2.facebook.com To: , CC: , , , , , , , Smtp-Origin-Cluster: prn2c22 Subject: [PATCH V3 6/7] proc: show MADV_FREE pages info in smaps Date: Tue, 14 Feb 2017 11:36:12 -0800 Message-ID: X-Mailer: git-send-email 2.9.3 In-Reply-To: References: X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-02-14_12:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org show MADV_FREE pages info of each vma in smaps. This is mainly for diagnose purpose. Userspace could use it to understand what happens in the vma. Cc: Michal Hocko Cc: Minchan Kim Cc: Hugh Dickins Cc: Johannes Weiner Cc: Rik van Riel Cc: Mel Gorman Cc: Andrew Morton Signed-off-by: Shaohua Li --- fs/proc/task_mmu.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index ee3efb2..8f2423f 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -440,6 +440,7 @@ struct mem_size_stats { unsigned long private_dirty; unsigned long referenced; unsigned long anonymous; + unsigned long lazyfree; unsigned long anonymous_thp; unsigned long shmem_thp; unsigned long swap; @@ -456,8 +457,11 @@ static void smaps_account(struct mem_size_stats *mss, struct page *page, int i, nr = compound ? 1 << compound_order(page) : 1; unsigned long size = nr * PAGE_SIZE; - if (PageAnon(page)) + if (PageAnon(page)) { mss->anonymous += size; + if (!PageSwapBacked(page)) + mss->lazyfree += size; + } mss->resident += size; /* Accumulate the size in pages that have been accessed. */ @@ -770,6 +774,7 @@ static int show_smap(struct seq_file *m, void *v, int is_pid) "Private_Dirty: %8lu kB\n" "Referenced: %8lu kB\n" "Anonymous: %8lu kB\n" + "LazyFree: %8lu kB\n" "AnonHugePages: %8lu kB\n" "ShmemPmdMapped: %8lu kB\n" "Shared_Hugetlb: %8lu kB\n" @@ -788,6 +793,7 @@ static int show_smap(struct seq_file *m, void *v, int is_pid) mss.private_dirty >> 10, mss.referenced >> 10, mss.anonymous >> 10, + mss.lazyfree >> 10, mss.anonymous_thp >> 10, mss.shmem_thp >> 10, mss.shared_hugetlb >> 10, -- 2.9.3