From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754061Ab2LRG5y (ORCPT ); Tue, 18 Dec 2012 01:57:54 -0500 Received: from mail-pb0-f45.google.com ([209.85.160.45]:41992 "EHLO mail-pb0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750950Ab2LRG5v (ORCPT ); Tue, 18 Dec 2012 01:57:51 -0500 X-Greylist: delayed 511 seconds by postgrey-1.27 at vger.kernel.org; Tue, 18 Dec 2012 01:57:51 EST From: Minchan Kim To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Minchan Kim , Michael Kerrisk , Arun Sharma , sanjay@google.com, Paul Turner , David Rientjes , John Stultz , Christoph Lameter , Android Kernel Team , Robert Love , Mel Gorman , Hugh Dickins , Dave Hansen , Rik van Riel , Dave Chinner , Neil Brown , Mike Hommey , Taras Glek , KOSAKI Motohiro , KAMEZAWA Hiroyuki Subject: [RFC v4 3/3] add PGVOLATILE vmstat count Date: Tue, 18 Dec 2012 15:47:54 +0900 Message-Id: <1355813274-571-4-git-send-email-minchan@kernel.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1355813274-571-1-git-send-email-minchan@kernel.org> References: <1355813274-571-1-git-send-email-minchan@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch add pgvolatile vmstat so admin can see how many of volatile pages are discarded by VM until now. It could be a good indicator of patch effect during test but still not sure we need it in real practice. Will rethink it. Cc: Michael Kerrisk Cc: Arun Sharma Cc: sanjay@google.com Cc: Paul Turner CC: David Rientjes Cc: John Stultz Cc: Andrew Morton Cc: Christoph Lameter Cc: Android Kernel Team Cc: Robert Love Cc: Mel Gorman Cc: Hugh Dickins Cc: Dave Hansen Cc: Rik van Riel Cc: Dave Chinner Cc: Neil Brown Cc: Mike Hommey Cc: Taras Glek Cc: KOSAKI Motohiro Cc: Christoph Lameter Cc: KAMEZAWA Hiroyuki Signed-off-by: Minchan Kim --- include/linux/vm_event_item.h | 2 +- mm/vmscan.c | 1 + mm/vmstat.c | 1 + 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index 3d31145..f83c3d2 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -23,7 +23,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, FOR_ALL_ZONES(PGALLOC), - PGFREE, PGACTIVATE, PGDEACTIVATE, + PGFREE, PGVOLATILE, PGACTIVATE, PGDEACTIVATE, PGFAULT, PGMAJFAULT, FOR_ALL_ZONES(PGREFILL), FOR_ALL_ZONES(PGSTEAL_KSWAPD), diff --git a/mm/vmscan.c b/mm/vmscan.c index cfe95d3..1ec7345 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -794,6 +794,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, if (page_mapped(page) && mapping) { switch (try_to_unmap(page, ttu_flags)) { case SWAP_DISCARD: + count_vm_event(PGVOLATILE); goto discard_page; case SWAP_FAIL: goto activate_locked; diff --git a/mm/vmstat.c b/mm/vmstat.c index c737057..9fd8ead 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -747,6 +747,7 @@ const char * const vmstat_text[] = { TEXTS_FOR_ZONES("pgalloc") "pgfree", + "pgvolatile", "pgactivate", "pgdeactivate", -- 1.7.9.5