Date: Tue, 26 Oct 2010 14:59:35 +0000 (UTC) From: Nathan Whitehorn <nwhitehorn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r214377 - stable/8/sys/vm Message-ID: <201010261459.o9QExZoZ041866@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: nwhitehorn Date: Tue Oct 26 14:59:35 2010 New Revision: 214377 URL: http://svn.freebsd.org/changeset/base/214377 Log: MFC r212360: 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. Modified: stable/8/sys/vm/vm_pageout.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) stable/8/sys/dev/xen/xenpci/ (props changed) Modified: stable/8/sys/vm/vm_pageout.c ============================================================================== --- stable/8/sys/vm/vm_pageout.c Tue Oct 26 14:56:46 2010 (r214376) +++ stable/8/sys/vm/vm_pageout.c Tue Oct 26 14:59:35 2010 (r214377) @@ -661,8 +661,11 @@ 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); }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201010261459.o9QExZoZ041866>