From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 12 Jun 2008 02:08:46 -0700 From: Andrew Morton Subject: Re: repeatable slab corruption with LTP msgctl08 Message-Id: <20080612020846.c77761cd.akpm@linux-foundation.org> In-Reply-To: <87mylrnj84.fsf@basil.nowhere.org> References: <20080611221324.42270ef2.akpm@linux-foundation.org> <20080611233449.08e6eaa0.akpm@linux-foundation.org> <20080612010200.106df621.akpm@linux-foundation.org> <20080612011537.6146c41d.akpm@linux-foundation.org> <87mylrnj84.fsf@basil.nowhere.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andi Kleen Cc: Nadia Derbey , Manfred Spraul , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Pekka Enberg List-ID: On Thu, 12 Jun 2008 10:35:55 +0200 Andi Kleen wrote: > Andrew Morton writes: > > > > Doing the same thing on 2.6.26-rc5-mm3, msgctl08 also runs to > > completion, in 20.9 seconds. So > > > > - it got slower > > That is because it scales itself to the number of available msg queues. > So with Nadia's patch there are more and it runs slower. > > In fact it seems to start one process per message queue, so perhaps it's > just running out of processes or something. Ok it should not segfault. > > BTW a great way to debug slab corruptions with LTP faster is to run with > a slab thrasher stress module like http://firstfloor.org/~andi/crasher-26.diff > Something like that might be needed. I ran it again and it took 49 minutes to crash. -- 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