From mboxrd@z Thu Jan 1 00:00:00 1970 From: pavel-velo@bug.ucw.cz Message-Id: <200011142012.VAA00150@bug.ucw.cz> Subject: RE: KPATCH] Reserve VM for root (was: Re: Looking for better VM) Date: Wed, 1 Jan 1997 22:21 -0800 Sender: owner-linux-mm@kvack.org Return-Path: To: Szabolcs Szakacsits , Rik van Riel Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds , Ingo Molnar List-ID: Hi! >I've also never said OOM killer should be disabled. In theory the >non-overcommitting systems deadlock, Linux survives. Ironically >usually it's just the opposite in practice. Any user can >deadlock/crash Linux [default install, no quotas] but not an >non-overcommitting system [root can clean up]. Here is an example code >"simulating" a leaking daemon that will "deadlock" Linux even with >your OOM killer patch [that is anyway *MUCH* better than the actually >non-existing one in 2.2.x kernels]: > >main() { while(1) if (fork()) malloc(1); } > >With the patch below I could ssh to the host and killall the offending >processes. To enable reserving VM space for root do what about main() { while(1) system("ftp localhost &"); } This. or so,ething similar should allow you to kill your machine even with your patch from normal user account Pavel -- 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.eu.org/Linux-MM/