From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <407865A4.4070403@upb.de> From: =?ISO-8859-1?Q?Sven_K=F6hler?= MIME-Version: 1.0 References: <185d01c41e23$5996cc00$2000000a@schlepptopp> <189201c41e30$d434cc70$2000000a@schlepptopp> <200404091626.i39GQqsf002414@ccure.user-mode-linux.org> <20040410140840.GB5782@ccure.user-mode-linux.org> <4077FDF9.7070707@upb.de> <20040410170707.GA6492@ccure.user-mode-linux.org> In-Reply-To: <20040410170707.GA6492@ccure.user-mode-linux.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Subject: [uml-devel] Re: [uml-user] Network lags Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Sat, 10 Apr 2004 23:22:44 +0200 To: Jeff Dike Cc: user-mode-linux-user@lists.sourceforge.net, user-mode-linux-devel@lists.sourceforge.net >>what's so bad about it? > > It can put the host at risk. There's a VM system for a reason, and it needs > swap in order to be able to back out of memory shortages. mlocking large > amounts of memory subverts that and increases the possibility of deadlocking. good point, but mlocking 128M should be like running the host with 128M less. so if i could tell the kernel not to touch a certain memory-area on the append-line, should there still be any VM issues? of course that would need further patching of the host-kernel so that UML can access and manage the reserved memory. >>well, what do you mean with managing the host memory? will be some kind >>tool or built-in option of the UML-kernel? > > Both. There is pluggable memory in UML, and a tool on the host to manage > memory by moving memory between UMLs and between UMLs and the host. sound good too, but what i have in mind is a more static thing. even if the host goes mad and eats all the memory, i still want to be sure that the UML-kernels have their memory region and this won't get swapped out. ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel