From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rik van Riel Subject: Re: [RFC] [RFT] [PATCH] memory zone balancing In-Reply-To: <200001040227.SAA98076@google.engr.sgi.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Date: Tue, 4 Jan 2000 04:23:31 +0100 Sender: owner-linux-mm@kvack.org Return-Path: To: Kanoj Sarcar Cc: Andrea Arcangeli , torvalds@transmeta.com, mingo@chiara.csoma.elte.hu, linux-kernel@vger.rutgers.edu, linux-mm@kvack.org List-ID: On Mon, 3 Jan 100, Kanoj Sarcar wrote: > Okay, here is a reworked version. Note that this version does not > do per-zone balancing, since experiments show that we need to tune > per-zone watermarks properly before we can start doing that. I am > working on coming up with a good estimate of per-zone watermarks. > Basically, I am trying to answer the question: if there are d dmapages, > r regular pages and h highmem pages, for a total of d+r+h pages, > what should the watermarks be for each zone? d+r+h > limit d > limit/2 r > limit/4 h > limit/8 DMA pages should always be present, regular pages for storing pagetables and stuff need to be there too, higmem pages we don't really care about. Btw, I think we probably want to increase freepages.min to 512 or even more on machines that have >1GB of memory. The current limit of 256 was really intended for machines with a single zone of memory... (but on <1GB machines I don't know if it makes sense to raise the limit much more ... maybe we should raise the limit automagically if the page alloc/io rate is too high?) regards, Rik -- The Internet is not a network of computers. It is a network of people. That is its real strength. -- 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.nl.linux.org/Linux-MM/