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From: Kip Macy <kmacy@FreeBSD.org>
Date: Tue, 20 Apr 2010 23:36:01 +0000 (UTC)
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Subject: svn commit: r206955 - user/kmacy/head_page_lock_2/sys/amd64/amd64
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Author: kmacy
Date: Tue Apr 20 23:36:01 2010
New Revision: 206955
URL: http://svn.freebsd.org/changeset/base/206955

Log:
  drop page lock if we leave the pmap copy loop

Modified:
  user/kmacy/head_page_lock_2/sys/amd64/amd64/pmap.c

Modified: user/kmacy/head_page_lock_2/sys/amd64/amd64/pmap.c
==============================================================================
--- user/kmacy/head_page_lock_2/sys/amd64/amd64/pmap.c	Tue Apr 20 23:35:20 2010	(r206954)
+++ user/kmacy/head_page_lock_2/sys/amd64/amd64/pmap.c	Tue Apr 20 23:36:01 2010	(r206955)
@@ -4131,8 +4131,10 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pm
 				continue;
 
 			dstmpde = pmap_allocpde(dst_pmap, pa, addr, M_NOWAIT);
-			if (dstmpde == NULL)
+			if (dstmpde == NULL) {
+				PA_UNLOCK(pa);
 				break;
+			}
 			pde = (pd_entry_t *)
 			    PHYS_TO_DMAP(VM_PAGE_TO_PHYS(dstmpde));
 			pde = &pde[pmap_pde_index(addr)];