From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from max.fys.ruu.nl (max.fys.ruu.nl [131.211.32.73]) by kvack.org (8.8.7/8.8.7) with ESMTP id JAA27093 for ; Thu, 27 Nov 1997 09:25:47 -0500 Date: Thu, 27 Nov 1997 14:35:31 +0100 (MET) From: Rik van Riel Subject: Re: fork: out of memory In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: linux-mm Cc: John Alvord , Jan Echternach , Mike Jagdis , linux-kernel@vger.rutgers.edu List-ID: On Thu, 27 Nov 1997, Rik van Riel wrote: > > Memory is getting so inexpensive in some environments, wouldn't it make > > sense to have an option to reserve DMA-able memory at init time? With 16 > > megs going for $60, it is worth setting aside 4megs or 8 megs which would > > have to be specially requested. > > 128 k would be enough, the largest DMA buffer allocated by devices > is 64k in size (soundcard) and ftape uses 3 32k area's. the scsi On second thought, it doesn't need to be completely free... If we can also use it for cache/buffer memory... Kicking that out when we can't find a 64kB area for DMA memory might be bad for performance (temporarily), but since it is good for stability, it is a Good Thing (any system outperforms a crashed system :) in search of a Better Thing (tm), Rik. ---------- Send Linux memory-management wishes to me: I'm currently looking for something to hack...