From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id 2EC5F6B0089 for ; Tue, 7 Dec 2010 11:39:23 -0500 (EST) Date: Tue, 7 Dec 2010 11:38:20 -0500 From: Ted Ts'o Subject: Re: ext4 memory leak? Message-ID: <20101207163820.GF24607@thunk.org> References: <20101205064430.GA15027@localhost> <4CFB9BE1.3030902@redhat.com> <20101207131136.GA20366@localhost> <20101207143351.GA23377@localhost> <20101207152120.GA28220@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101207152120.GA28220@localhost> Sender: owner-linux-mm@kvack.org To: Wu Fengguang Cc: Rik van Riel , Peter Zijlstra , Andrew Morton , Chris Mason , Dave Chinner , Jan Kara , Jens Axboe , Mel Gorman , KOSAKI Motohiro , Christoph Hellwig , linux-mm , "linux-fsdevel@vger.kernel.org" , LKML , "linux-ext4@vger.kernel.org" List-ID: On Tue, Dec 07, 2010 at 11:21:20PM +0800, Wu Fengguang wrote: > On Tue, Dec 07, 2010 at 10:33:51PM +0800, Wu Fengguang wrote: > > > In a simple dd test on a 8p system with "mem=256M", I find the light > > > > When increasing to 10 concurrent dd tasks, I managed to crash ext4.. > > (2 concurrent dd's are OK, with very good write performance.) What was the dd command line? Specifically, how big were the file writes? I haven't been able to replicate a leak. I'll try on a small system seeing if I can replicate an OOM kill, but I'm not seeing a leak. (i.e., after the dd if=/dev/zero of=/test/$i" jobs) are finished, the memory utilization looks normal and I don't see any obvious slab leaks. - Ted -- 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/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org