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From: Attilio Rao <attilio@FreeBSD.org>
Date: Tue, 20 Mar 2012 21:44:48 +0000 (UTC)
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Cc: 
Subject: svn commit: r233251 -
	user/attilio/vmcontention/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
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Author: attilio
Date: Tue Mar 20 21:44:48 2012
New Revision: 233251
URL: http://svn.freebsd.org/changeset/base/233251

Log:
  Restore the cleanup of cached pages in zfs_lookup().
  
  Tested by:	flo

Modified:
  user/attilio/vmcontention/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c

Modified: user/attilio/vmcontention/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
==============================================================================
--- user/attilio/vmcontention/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c	Tue Mar 20 21:37:52 2012	(r233250)
+++ user/attilio/vmcontention/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c	Tue Mar 20 21:44:48 2012	(r233251)
@@ -323,20 +323,32 @@ page_lookup(vnode_t *vp, int64_t start, 
 	VM_OBJECT_LOCK_ASSERT(obj, MA_OWNED);
 
 	for (;;) {
-		if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL &&
-		    vm_page_is_valid(pp, (vm_offset_t)off, nbytes)) {
-			if ((pp->oflags & VPO_BUSY) != 0) {
-				/*
-				 * Reference the page before unlocking and
-				 * sleeping so that the page daemon is less
-				 * likely to reclaim it.
-				 */
-				vm_page_reference(pp);
-				vm_page_sleep(pp, "zfsmwb");
-				continue;
+		pp = vm_radix_lookup(&obj->rtree, OFF_TO_IDX(start),
+		    VM_RADIX_ANY);
+		if (pp != NULL) {
+			if (vm_page_is_valid(pp, (vm_offset_t)off, nbytes)) {
+				if ((pp->oflags & VPO_BUSY) != 0) {
+					/*
+					 * Reference the page before unlocking
+					 * and sleeping so that the page
+					 * daemon is less likely to reclaim it.
+					 */
+					vm_page_reference(pp);
+					vm_page_sleep(pp, "zfsmwb");
+					continue;
+				}
+				vm_page_busy(pp);
+				vm_page_undirty(pp);
+			} else {
+				if (obj->cached_page_count != 0 &&
+				    (pp->flags & PG_CACHED) != 0) {
+					mtx_lock(&vm_page_queue_free_mtx);
+					if (pp->object == obj)
+						vm_page_cache_free(pp);
+					mtx_unlock(&vm_page_queue_free_mtx);
+				}
+				pp = NULL;
 			}
-			vm_page_busy(pp);
-			vm_page_undirty(pp);
 		} else
 			pp = NULL;
 		break;