Nathan Whitehorn wrote:
Author: nwhitehorn
Date: Thu Sep 9 13:32:58 2010
New Revision: 212360
URL: http://svn.freebsd.org/changeset/base/212360
Log:
On architectures with non-tree-based page tables like PowerPC, every page
in a range must be checked when calling pmap_remove(). Calling
pmap_remove() from vm_pageout_map_deactivate_pages() with the entire range
of the map could result in attempting to demap an extraordinary number
of pages (> 10^15), so iterate through each map entry and unmap each of
them individually.
This is a machine-dependent issue, and so I will argue that it is the
pmap's and not the machine-independent layer's responsibility to deal
with this. Our sparc64 port faces the same problem with the TSB, and it
deals with it internally. Moreover, the solution isn't that
complicated. Is there any reason why the sparc64 solution can't be
applied to powerpc?
Regards,
Alan
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
