From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx150.postini.com [74.125.245.150]) by kanga.kvack.org (Postfix) with SMTP id D3F006B0044 for ; Sat, 22 Sep 2012 03:19:45 -0400 (EDT) Received: by wgbdq12 with SMTP id dq12so1845537wgb.26 for ; Sat, 22 Sep 2012 00:19:44 -0700 (PDT) Message-ID: <505D668C.7010206@suse.cz> Date: Sat, 22 Sep 2012 09:19:40 +0200 From: Jiri Slaby MIME-Version: 1.0 Subject: Re: [PATCH 6/7] mm: add CONFIG_DEBUG_VM_RB build option References: <1346750457-12385-1-git-send-email-walken@google.com> <1346750457-12385-7-git-send-email-walken@google.com> <5053AC2F.3070203@gmail.com> <20120915000029.GA29426@google.com> <505433A0.3010702@suse.cz> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Hugh Dickins Cc: Michel Lespinasse , Sasha Levin , linux-mm@kvack.org, riel@redhat.com, peterz@infradead.org, aarcange@redhat.com, daniel.santos@pobox.com, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, Dave Jones On 09/16/2012 09:07 PM, Hugh Dickins wrote: >> What was the way that >> Hugh used to reproduce the other issue? > > I've lost track of which issue is "other". The other was meant to be the BUG I hit. > To reproduce Sasha's interval_tree.c warnings, all I had to do was switch > on CONFIG_DEBUG_VM_RB (I regret not having done so before) and boot up. > > I didn't look to see what was doing the mremap which caused the warning > until now: surprisingly, it's microcode_ctl. I've not made much effort > to get the right set of sources and work out why that would be using > mremap (a realloc inside a library?). > > I failed to reproduce your BUG in huge_memory.c, but what I was trying > was SuSE update via yast2, on several machines; but perhaps because > they were all fairly close to up-to-date, I didn't hit a problem. > (That was before I turned on DEBUG_VM_RB for Sasha's.) The good news are that I cannot reproduce either with the patch applied. thanks, -- js suse labs -- 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