From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id CE89C6B005A for ; Sun, 5 Jul 2009 13:58:30 -0400 (EDT) Date: Sun, 5 Jul 2009 21:02:00 +0800 From: Wu Fengguang Subject: Re: [PATCH 5/5] add NR_ANON_PAGES to OOM log Message-ID: <20090705130200.GA6585@localhost> References: <20090705182533.0902.A69D9226@jp.fujitsu.com> <20090705121308.GC5252@localhost> <20090705211739.091D.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090705211739.091D.A69D9226@jp.fujitsu.com> Sender: owner-linux-mm@kvack.org To: KOSAKI Motohiro Cc: LKML , linux-mm , Andrew Morton , Christoph Lameter , David Rientjes , Rik van Riel List-ID: On Sun, Jul 05, 2009 at 08:21:20PM +0800, KOSAKI Motohiro wrote: > > On Sun, Jul 05, 2009 at 05:26:18PM +0800, KOSAKI Motohiro wrote: > > > Subject: [PATCH] add NR_ANON_PAGES to OOM log > > > > > > show_free_areas can display NR_FILE_PAGES, but it can't display > > > NR_ANON_PAGES. > > > > > > this patch fix its inconsistency. > > > > > > > > > Reported-by: Wu Fengguang > > > Signed-off-by: KOSAKI Motohiro > > > --- > > > mm/page_alloc.c | 1 + > > > 1 file changed, 1 insertion(+) > > > > > > Index: b/mm/page_alloc.c > > > =================================================================== > > > --- a/mm/page_alloc.c > > > +++ b/mm/page_alloc.c > > > @@ -2216,6 +2216,7 @@ void show_free_areas(void) > > > printk("= %lukB\n", K(total)); > > > } > > > > > > + printk("%ld total anon pages\n", global_page_state(NR_ANON_PAGES)); > > > printk("%ld total pagecache pages\n", global_page_state(NR_FILE_PAGES)); > > > > Can we put related items together, ie. this looks more friendly: > > > > Anon:XXX active_anon:XXX inactive_anon:XXX > > File:XXX active_file:XXX inactive_file:XXX > > hmmm. Actually NR_ACTIVE_ANON + NR_INACTIVE_ANON != NR_ANON_PAGES. > tmpfs pages are accounted as FILE, but it is stay in anon lru. Right, that's exactly the reason I propose to put them together: to make the number of tmpfs pages obvious. > I think your proposed format easily makes confusion. this format cause to > imazine Anon = active_anon + inactive_anon. Yes it may confuse normal users :( > At least, we need to use another name, I think. Hmm I find it hard to work out a good name. But instead, it may be a good idea to explicitly compute the tmpfs pages, because the excessive use of tmpfs pages could be a common reason of OOM. Thanks, Fengguang -- 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/ . Don't email: email@kvack.org