From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qc0-f179.google.com (mail-qc0-f179.google.com [209.85.216.179]) by kanga.kvack.org (Postfix) with ESMTP id C60666B0167 for ; Wed, 19 Mar 2014 10:52:11 -0400 (EDT) Received: by mail-qc0-f179.google.com with SMTP id m20so9731420qcx.24 for ; Wed, 19 Mar 2014 07:52:11 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTP id c8si5711170qco.32.2014.03.19.07.52.10 for ; Wed, 19 Mar 2014 07:52:11 -0700 (PDT) Date: Wed, 19 Mar 2014 10:52:00 -0400 From: Dave Jones Subject: Re: bad rss-counter message in 3.14rc5 Message-ID: <20140319145200.GA4608@redhat.com> References: <20140311142817.GA26517@redhat.com> <20140311143750.GE32390@moon> <20140311171045.GA4693@redhat.com> <20140311173603.GG32390@moon> <20140311173917.GB4693@redhat.com> <5328F3B4.1080208@oracle.com> <20140319020602.GA29787@redhat.com> <20140319021131.GA30018@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Hugh Dickins Cc: Sasha Levin , Cyrill Gorcunov , Andrew Morton , Linux Kernel , linux-mm@kvack.org, Linus Torvalds , Joonsoo Kim , Bob Liu , Konstantin Khlebnikov On Tue, Mar 18, 2014 at 07:19:09PM -0700, Hugh Dickins wrote: > Another positive on the rss counters, great, thanks Dave. > That encourages me to think again on the swapops BUG, but no promises. So while I slept I ran a test kernel with that swapops BUG replaced with a printk. I'm not sure of the validity of this, given the state of the kernel afterwards is somewhat suspect, but I did see in the logs this morning.. [18728.075153] migration_entry_to_page BUG hit [18728.200705] BUG: Bad rss-counter state mm:ffff880241b3f500 idx:0 val:1 (Not tainted) [18728.200706] BUG: Bad rss-counter state mm:ffff880241b3f500 idx:1 val:-1 (Not tainted) This might be collateral damage from the swapops thing, I guess we won't know until that gets fixed, but I thought I'd mention that we might still have a problem here. Dave -- 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