Re: O->A loan

[Chuck Silvers <chuq%chuq.com@localhost>]

On Sun, Nov 20, 2011 at 06:52:10PM +0000, YAMAMOTO Takashi wrote:
> hi,
> 
> i'd like to to either fix or remove O->A page loaning.
> 
> the biggest problem is the lack of users.  thus no way to test.
> any ideas?

some years ago I wrote some prototype code to use the O->A loaning for
read() and write().  the read() side worked, I don't think I had tested
the write() side so it probably has problems.  the patch is still around:
ftp://ftp.netbsd.org/pub/NetBSD/misc/chs/diff.uvm_readloan.8

it's quite a bit out of date, but I think most of the changes needed
to update it would be mechanical.

-Chuck