From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta8.messagelabs.com (mail6.bemta8.messagelabs.com [216.82.243.55]) by kanga.kvack.org (Postfix) with ESMTP id 1F889900122 for ; Tue, 5 Jul 2011 04:23:09 -0400 (EDT) Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [202.81.31.245]) by e23smtp05.au.ibm.com (8.14.4/8.13.1) with ESMTP id p658GkbK002011 for ; Tue, 5 Jul 2011 18:16:46 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p658N5sX1175634 for ; Tue, 5 Jul 2011 18:23:05 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p658N443029931 for ; Tue, 5 Jul 2011 18:23:05 +1000 From: Ankita Garg Subject: [PATCH 4/5] Capture references to page cache pages Date: Tue, 5 Jul 2011 13:52:38 +0530 Message-Id: <1309854159-8277-5-git-send-email-ankita@in.ibm.com> In-Reply-To: <1309854159-8277-1-git-send-email-ankita@in.ibm.com> References: <1309854159-8277-1-git-send-email-ankita@in.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: ankita@in.ibm.com, svaidy@linux.vnet.ibm.com, linux-kernel@vger.kernel.org Hi, Page cache accesses may not be mapped, hence fake an access when a pagecache page is looked up, by marking the corresponding memory address block as accessed. Signed-off-by: Ankita Garg --- mm/filemap.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/mm/filemap.c b/mm/filemap.c index a8251a8..7ae7f36 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -36,6 +36,7 @@ #include /* for page_is_file_cache() */ #include #include "internal.h" +#include /* * FIXME: remove all knowledge of the buffer layer from the core VM @@ -730,6 +731,13 @@ repeat: page_cache_release(page); goto repeat; } +#if defined(CONFIG_MEMTRACE) + if(get_pg_trace_pid() != -1 && current->mem_trace) { + unsigned long pfn = page_to_pfn(page); + if(pfn_valid(pfn)) + mark_memtrace_block_accessed(pfn << PAGE_SHIFT); + } +#endif } out: rcu_read_unlock(); -- 1.7.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org