Subject: Re: UVM aobj: Large VM objects.
To: None <,>
From: Pavel Cahyna <>
List: tech-kern
Date: 03/07/2006 16:54:12
On Tue, Mar 07, 2006 at 10:09:22PM +0900, YAMAMOTO Takashi wrote:
> > > however, i don't think long is appropriate here.
> > > please introduce a 64-bit "page offset" type.
> > > "typedef voff_t pgoff_t" should be fine.
> > 
> >  	Can't we use something similar to vm_offset_t, which is
> >  	appropriately sized for the machine?
> > 
> >  	If we are ever going to need it to be 64bit on every arch with 32bit
> >  	physical and virtual addresses then I agree it should be 64bit,
> >  	but otherwise its yet another tiny performance loss/memory
> >  	growth, continuing the pecking to death by ducks...
> IMO, the appropriate size is arch-independent
> as far as aobj is used for tmpfs or such.

So, if it was 32-bit, would it limit size of tmpfs files to 2^32 bytes, or
2^32 pages? The latter maybe isn't that serious.

Pavel Cahyna

P.S. the Cc: header of your message has really strange addresses. It is
just me?