Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262497AbTHaRb6 (ORCPT ); Sun, 31 Aug 2003 13:31:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262540AbTHaRb5 (ORCPT ); Sun, 31 Aug 2003 13:31:57 -0400 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:41162 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S262497AbTHaRbX (ORCPT ); Sun, 31 Aug 2003 13:31:23 -0400 Date: Sun, 31 Aug 2003 14:34:01 -0300 (BRT) From: Marcelo Tosatti X-X-Sender: marcelo@logos.cnet To: Andrea Arcangeli Cc: lkml Subject: Re: Andrea VM changes Message-ID: 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: 1753 Lines: 40 ---------- Forwarded message ---------- Date: Sun, 31 Aug 2003 12:43:27 -0300 (BRT) From: Marcelo Tosatti To: Andrea Arcangeli Cc: Marcelo Tosatti , Mike Fedyk , Antonio Vargas , lkml , Marc-Christian Petersen Subject: Re: Andrea VM changes On Sun, 31 Aug 2003, Andrea Arcangeli wrote: > This oom killer on desktops may do a worse selections of the task to > kill (the usual ssh now has a chance to be killed), but it fixes the oom > deadlocks and it won't do stupid things on servers shall a netscape or > whatever else app hit an userspace bug. So I've to prefer it, until I > will write a reliable algorithm for the oom killing that won't fall into > dosable corner cases so easily (mlock/nfs/database as the three most > common examples of where current mainline can fail, btw the lowmem > shortage is another very common DoS that the oom killer will never > notice, my tree doesn't deadlock [or at least not technically, in > practice it may look like a kernel deadlock despite syscalls returns > -ENOMEM ;) ] during lowmem shortage on the 64G boxes). Suppose you have a big fat hog leaking (lets say, netscape) allocating pages at a slow pace. Now you have a decent well behaved app who is allocating at a fast pace, and gets killed. The chance the well behaved app gets killed is big, right? - 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/