Subject: Re: pageable kernel pmap entries
To: None <>
From: Gandhi woulda smacked you <>
List: tech-kern
Date: 04/29/1999 10:57:53
On Thu, 29 Apr 1999, Eduardo E. Horvath wrote:

# On Thu, 29 Apr 1999, Chuck Silvers wrote:
# > one bit of separable work that'll be needed for the merged buffer/page cache
# > stuff is pageable kernel pmap entries, which are not implemented on at least
# > the sparc port (both sun4c and sun4m).  some of the other pmap modules
# > are pretty opaque to me so there might be others that need work.
# What do you mean by `pageable kernel pmap entries'?  Do you plan to page
# out parts of the kernel pmap?  Why is this a requirement for the merged
# buffer/page cache stuff?

Speaking from a non-kernel-hacker's point of view, I think the requirement
for the pageable KPE is to reduce the number of pages that get dumped
on a crash (a la SunOS 4.x), which I think is quite reasonable.  I don't
think I have 64MB of important information active when my machine goes

If it helps the merged buffer/page cache bit, so much the better.

# =========================================================================
# Eduardo Horvath
# 	"I need to find a pithy new quote." -- me

NetBSD:  Exercised any daemons lately?