From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from digeo-nav01.digeo.com (digeo-nav01.digeo.com [192.168.1.233]) by packet.digeo.com (8.9.3+Sun/8.9.3) with SMTP id OAA21583 for ; Mon, 21 Oct 2002 14:33:42 -0700 (PDT) Message-ID: <3DB472B6.BC5B8924@digeo.com> Date: Mon, 21 Oct 2002 14:33:42 -0700 From: Andrew Morton MIME-Version: 1.0 Subject: Re: ZONE_NORMAL exhaustion (dcache slab) References: <3DB46DFA.DFEB2907@digeo.com> <308170000.1035234988@flay> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: "Martin J. Bligh" Cc: linux-kernel , linux-mm mailing list List-ID: "Martin J. Bligh" wrote: > > >> My big NUMA box went OOM over the weekend and started killing things > >> for no good reason (2.5.43-mm2). Probably running some background > >> updatedb for locate thing, not doing any real work. > >> > >> meminfo: > >> > > > > Looks like a plain dentry leak to me. Very weird. > > > > Did the machine recover and run normally? > > Nope, kept OOMing and killing everything . Something broke. > > Was it possible to force the dcache to shrink? (a cat /dev/hda1 > > would do that nicely) > > Well, I didn't try that, but even looking at man pages got oom killed, > so I guess not ... were you looking at the cat /dev/hda1 to fill pagecache > or something? I have 16Gb of highmem (pretty much all ununsed) so > presumably that'd fill the highmem first (pagecache?) Blockdevices only use ZONE_NORMAL for their pagecache. That cat will selectively put pressure on the normal zone (and DMA zone, of course). > > Is it reproducible? > > Will try again. Presumably "find /" should do it? ;-) You must have a lot of files. Actually, I expect a `find /' will only stat directories, whereas an `ls -lR /' will stat plain files as well. Same thing for dcache, but the ls will push the icache harder. I don't know if updatedb stats regular files. Presumably not. -- 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/