From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 4 Nov 2005 11:21:18 +0100 From: Ingo Molnar Subject: Re: [patch] swapin rlimit Message-ID: <20051104102118.GA26388@elte.hu> References: <200511021747.45599.rob@landley.net> <43699573.4070301@yahoo.com.au> <200511030007.34285.rob@landley.net> <20051103163555.GA4174@ccure.user-mode-linux.org> <1131035000.24503.135.camel@localhost.localdomain> <20051103205202.4417acf4.akpm@osdl.org> <20051104072628.GA20108@elte.hu> <1131099267.30726.43.camel@tara.firmix.at> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1131099267.30726.43.camel@tara.firmix.at> Sender: owner-linux-mm@kvack.org Return-Path: To: Bernd Petrovitsch Cc: Andrew Morton , Badari Pulavarty , Linus Torvalds , jdike@addtoit.com, rob@landley.net, nickpiggin@yahoo.com.au, gh@us.ibm.com, kamezawa.hiroyu@jp.fujitsu.com, haveblue@us.ibm.com, mel@csn.ul.ie, mbligh@mbligh.org, kravetz@us.ibm.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, lhms-devel@lists.sourceforge.net List-ID: * Bernd Petrovitsch wrote: > On Fri, 2005-11-04 at 08:26 +0100, Ingo Molnar wrote: > > * Andrew Morton wrote: > > > > > Similarly, that SGI patch which was rejected 6-12 months ago to kill > > > off processes once they started swapping. We thought that it could be > > > done from userspace, but we need a way for userspace to detect when a > > > task is being swapped on a per-task basis. > > > > wouldnt the clean solution here be a "swap ulimit"? > > Hmm, where is the difference to "mlockall(MCL_CURRENT|MCL_FUTURE);"? > OK, mlockall() can only be done by root (processes). what do you mean? mlockall pins down all pages. swapin ulimit kills the task (and thus frees all the RAM it had) when it touches swap for the first time. These two solutions almost oppose each other! Ingo -- 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: email@kvack.org