From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 8 Mar 2000 19:26:22 -0300 (BRST) From: Rik van Riel Reply-To: riel@nl.linux.org Subject: Re: Linux responsiveness under heavy load In-Reply-To: <20000308223851.A9519@pcep-jamie.cern.ch> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Jamie Lokier Cc: linux-kernel@vger.rutgers.edu, linux-mm@kvack.org List-ID: On Wed, 8 Mar 2000, Jamie Lokier wrote: [snip awful performance under load] > A larger boost to keep-the-page-in-memory priority for pages > referenced by "interactive" processes might be in order. > Either faster vmscanning simply a higher priority for pages > found to be used. Might not be too hard to implement either. Indeed it shouldn't be. Having a two-phase NRU unmapping in the page table scanning and a maybe better LRU reclamation in shrink_mmap() may help here, but the CPU cost may put some people off... Then again, not having this better memory reclamation is probably more expensive than having it :) Now where did I put that asbestos underwear? > A larger priority for page-in I/O due to interactive process too > might help too. Some modification of Andrea's elevator. But > that doesn't seem so easy. Read requests are easily tied to a process, so this could be relatively easy. Doing it properly before 2.5 may be a little difficult though ... regards, Rik -- The Internet is not a network of computers. It is a network of people. That is its real strength. http://www.conectiva.com/ http://www.surriel.com/ -- 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/