Subject: Re: comparing raid-like filesystems
To: Pavel Cahyna <>
From: David Laight <>
List: current-users
Date: 02/01/2003 19:22:33
On Sat, Feb 01, 2003 at 07:54:27PM +0100, Pavel Cahyna wrote:
> > 
> > Right now we are limited to MAXPHYS (64k) for each "disk".
> Why this limit? Is this a heritage from PDP-11 with its (i think)
> 64kB address space?

I doubt it, you would never want to allocate a buffer that big
on a system with only 16bit addressing, even if the MMU supports
256k+ of physical memory.

Or possibly other systems that cannot DMA across 64k boundaries.
- except would they be scatter gather transfers?


David Laight: