Date: Thu, 26 Dec 2013 05:46:10 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r259908 - head/sys/vm Message-ID: <201312260546.rBQ5kAoJ009798@svn.freebsd.org>
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Author: marcel Date: Thu Dec 26 05:46:10 2013 New Revision: 259908 URL: http://svnweb.freebsd.org/changeset/base/259908 Log: For ia64, use pmap_remove_pages() and not pmap_remove(). The problem is that we don't have a good way (yet) to iterate over the mapped pages by virtual address and simply try each page within the range. Given that we call pmap_remove() over the entire 2^63 bytes of address space, it takes a while for pmap_remove to have tried all 2^50 pages. By using pmap_remove_pages() we use the PV list to find all mappings. Change derived from a patch by: alc Modified: head/sys/vm/vm_pageout.c Modified: head/sys/vm/vm_pageout.c ============================================================================== --- head/sys/vm/vm_pageout.c Thu Dec 26 05:22:38 2013 (r259907) +++ head/sys/vm/vm_pageout.c Thu Dec 26 05:46:10 2013 (r259908) @@ -875,6 +875,14 @@ vm_pageout_map_deactivate_pages(map, des tmpe = tmpe->next; } +#ifdef __ia64__ + /* + * Remove all non-wired, managed mappings if a process is swapped out. + * This will free page table pages. + */ + if (desired == 0) + pmap_remove_pages(map->pmap); +#else /* * Remove all mappings if a process is swapped out, this will free page * table pages. @@ -883,6 +891,8 @@ vm_pageout_map_deactivate_pages(map, des pmap_remove(vm_map_pmap(map), vm_map_min(map), vm_map_max(map)); } +#endif + vm_map_unlock(map); } #endif /* !defined(NO_SWAPPING) */
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