Date: Tue, 20 Apr 2010 04:16:39 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r206885 - head/sys/vm Message-ID: <201004200416.o3K4Gdc3011461@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: alc Date: Tue Apr 20 04:16:39 2010 New Revision: 206885 URL: http://svn.freebsd.org/changeset/base/206885 Log: Eliminate an unnecessary call to pmap_remove_all(). If a page belongs to an object whose reference count is zero, then that page cannot possibly be mapped. Modified: head/sys/vm/vm_pageout.c Modified: head/sys/vm/vm_pageout.c ============================================================================== --- head/sys/vm/vm_pageout.c Tue Apr 20 03:20:20 2010 (r206884) +++ head/sys/vm/vm_pageout.c Tue Apr 20 04:16:39 2010 (r206885) @@ -1122,7 +1122,8 @@ unlock_and_continue: m->act_count == 0) { page_shortage--; if (object->ref_count == 0) { - pmap_remove_all(m); + KASSERT(!pmap_page_is_mapped(m), + ("vm_pageout_scan: page %p is mapped", m)); if (m->dirty == 0) vm_page_cache(m); else
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201004200416.o3K4Gdc3011461>