Date: Sun, 3 Mar 2013 01:36:31 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r247682 - user/attilio/vmc-playground/sys/vm Message-ID: <201303030136.r231aVlv026794@svn.freebsd.org>
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Author: alc Date: Sun Mar 3 01:36:31 2013 New Revision: 247682 URL: http://svnweb.freebsd.org/changeset/base/247682 Log: Two out of three times that vm_page_find_least() is called, it's going to return the vm object's first page. In those cases, there is no need to traverse the trie. Sponsored by: EMC / Isilon Storage Division Modified: user/attilio/vmc-playground/sys/vm/vm_page.c Modified: user/attilio/vmc-playground/sys/vm/vm_page.c ============================================================================== --- user/attilio/vmc-playground/sys/vm/vm_page.c Sun Mar 3 01:26:11 2013 (r247681) +++ user/attilio/vmc-playground/sys/vm/vm_page.c Sun Mar 3 01:36:31 2013 (r247682) @@ -929,9 +929,12 @@ vm_page_lookup(vm_object_t object, vm_pi vm_page_t vm_page_find_least(vm_object_t object, vm_pindex_t pindex) { + vm_page_t m; VM_OBJECT_LOCK_ASSERT(object, MA_OWNED); - return (vm_radix_lookup_ge(&object->rtree, pindex)); + if ((m = TAILQ_FIRST(&object->memq)) != NULL && m->pindex < pindex) + m = vm_radix_lookup_ge(&object->rtree, pindex); + return (m); } /*
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