From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 24 Aug 2004 14:43:12 -0700 From: Andrew Morton Subject: Re: [Bug 3268] New: Lowmemory exhaustion problem with v2.6.8.1-mm4 16gb Message-Id: <20040824144312.09b4af42.akpm@osdl.org> In-Reply-To: <200408242051.i7OKplP0009870@fire-1.osdl.org> References: <200408242051.i7OKplP0009870@fire-1.osdl.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: kmannth@us.ibm.com Cc: linux-mm@kvack.org, Hugh Dickins List-ID: bugme-daemon@osdl.org wrote: > > http://bugme.osdl.org/show_bug.cgi?id=3268 > > Summary: Lowmemory exhaustion problem with v2.6.8.1-mm4 16gb > Kernel Version: 2.6.8.1-mm4 > Status: NEW > Severity: high > Owner: akpm@digeo.com > Submitter: kmannth@us.ibm.com > CC: mbligh@aracnet.com > > > Distribution: SuSE SLES9 base > Hardware Environment: IBM x445 8-way 32gb and 16 gb > Software Environment: 2.6.8.1-mm4 > Problem Description: I run out of lowmemory very easily using /dev/shm/ > I have 64g and Numa/Discontig enabled in my kernel. > > Steps to reproduce: Fill up 1/2 or more of /dev/shm (on my system it is about > 1/3-1/2 of my total system memory) with lots of kernel builds. Observe system > breakdown. (If you want the script I will email it to you). I have seen this > with both 32 gigs and 16 gigs... > > For example if I boot with 16gb and I start 45 kernel builds in /dev/shm they > system take about 30-60 seconds to run out of lowmemory. > The oom killer comes in and starts shutting down processes. The system is unsuable. > There is tons of highmem left but no lowmem. Is there something about > /dev/shm that might cause this? > > I turned some various vm debug optoins that printed out some info that I will > attach. I will attach the config file and as much of the kernel messages as I > can. I assume this is because we're using up all of lowmem with filesystem metadata. Hugh? -- 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: aart@kvack.org