Subject: Re: kernel wired pages
To: YAMAMOTO Takashi <email@example.com>
From: Chuck Silvers <firstname.lastname@example.org>
Date: 01/16/2005 17:42:31
On Mon, Jan 17, 2005 at 06:42:21AM +0900, YAMAMOTO Takashi wrote:
> > > > I don't think uvm_km_free() would actually need to be told which flags were
> > > > passed to uvm_km_kmemalloc(), it can probably figure everything out from
> > > > the contents of the map.
> > >
> > > i don't think keeping more info in the lower layer is a good idea
> > > because
> > > - it prevents map_entry merge between different allocation types and
> > > thus increases search cost.
> > I wouldn't think we should merge pageable and non-pageable entries anyway.
> > or would there end up being more than 2 types?
> i was talking about kva-only allocations.
> because callers of uvm_km_free often knows that there's
> no remaining page mapping on them, i'd like to distinguish them
> from malloc(9)-type allocations for efficiency.
oh, that other type. ok, that's a good enough reason.