Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264202AbUFSRuc (ORCPT ); Sat, 19 Jun 2004 13:50:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264348AbUFSRub (ORCPT ); Sat, 19 Jun 2004 13:50:31 -0400 Received: from fw.osdl.org ([65.172.181.6]:21168 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S264202AbUFSRua (ORCPT ); Sat, 19 Jun 2004 13:50:30 -0400 Date: Sat, 19 Jun 2004 10:50:08 -0700 (PDT) From: Linus Torvalds To: Grzegorz Kulewski cc: Linux Kernel Mailing List , Andrew Morton , Nick Piggin Subject: Re: Memory and rsync problem with vanilla 2.6.7 In-Reply-To: Message-ID: References: <20040426013944.49a105a8.akpm@osdl.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1446 Lines: 42 On Sat, 19 Jun 2004, Grzegorz Kulewski wrote: > > Is this bug or feature? Is there some wreid memmory leak? Where is my RAM? Your memory is apparently in dentry and inode memory: ext3_inode_cache 62553 62553 4096 (244MB) dentry_cache 48768 48768 4096 (190MB) and it really looks like you have enabled CONFIG_DEBUG_PAGEALLOC, which just eats memory like mad (a dentry is normally ~200 bytes, but then when it is rounded up to page-size, it takes 20 times the memory). So don't enable DEBUG_PAGEALLOC unless you really want to debug some strange problem. That said, there might be a memory balancing problem too, and DEBUG_PAGEALLOC just makes it more obvious. Nick Piggin reports that an "obvious fix" by Andrew potentially causes problems, and if you're a BK user, you could try just backing out this cset: ChangeSet@1.1722.88.2, 2004-06-03 07:58:03-07:00, akpm@osdl.org [PATCH] shrink_all_memory() fixes .... (check with "bk changes" what the revision is in your tree, and do a bk cset -xX.XXX.XX.X to try reverting it. Quite possibly that fix makes the VM much less likely to throw out the VM caches, which would make the debug problem much worse). Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/