Date: Thu, 9 Sep 2010 13:32:58 +0000 (UTC) From: Nathan Whitehorn <nwhitehorn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r212360 - head/sys/vm Message-ID: <201009091332.o89DWw9H087769@svn.freebsd.org>
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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. MFC after: 6 weeks Modified: head/sys/vm/vm_pageout.c Modified: head/sys/vm/vm_pageout.c ============================================================================== --- head/sys/vm/vm_pageout.c Thu Sep 9 13:17:30 2010 (r212359) +++ head/sys/vm/vm_pageout.c Thu Sep 9 13:32:58 2010 (r212360) @@ -701,8 +701,11 @@ vm_pageout_map_deactivate_pages(map, des * 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); }
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