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author | Nathan Whitehorn <nwhitehorn@FreeBSD.org> | 2010-09-09 13:32:58 +0000 |
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committer | Nathan Whitehorn <nwhitehorn@FreeBSD.org> | 2010-09-09 13:32:58 +0000 |
commit | 42768fec0fe3ff53d4ea4ea1bf839ab2f83a0506 (patch) | |
tree | 4dcb1a2fef70ee18f312a7eb4038d7becaee9064 /sys | |
parent | c14e163ad105ea63fe90eb5f6e1fe6dad0511067 (diff) | |
download | src-42768fec0fe3ff53d4ea4ea1bf839ab2f83a0506.tar.gz src-42768fec0fe3ff53d4ea4ea1bf839ab2f83a0506.zip |
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
Notes
Notes:
svn path=/head/; revision=212360
Diffstat (limited to 'sys')
-rw-r--r-- | sys/vm/vm_pageout.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/vm/vm_pageout.c b/sys/vm/vm_pageout.c index f4109c1136e1..3d96d9ec3db7 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); } |