From 42768fec0fe3ff53d4ea4ea1bf839ab2f83a0506 Mon Sep 17 00:00:00 2001 From: Nathan Whitehorn Date: Thu, 9 Sep 2010 13:32:58 +0000 Subject: [PATCH] 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. MFC after: 6 weeks --- sys/vm/vm_pageout.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/sys/vm/vm_pageout.c b/sys/vm/vm_pageout.c index f4109c1136e..3d96d9ec3db 100644 --- a/sys/vm/vm_pageout.c +++ b/sys/vm/vm_pageout.c @@ -701,8 +701,11 @@ vm_pageout_map_deactivate_pages(map, desired) * table pages. */ if (desired == 0 && nothingwired) { - pmap_remove(vm_map_pmap(map), vm_map_min(map), - vm_map_max(map)); + tmpe = map->header.next; + while (tmpe != &map->header) { + pmap_remove(vm_map_pmap(map), tmpe->start, tmpe->end); + tmpe = tmpe->next; + } } vm_map_unlock(map); }