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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Mon, 3 May 2010 19:19:59 +0000 (UTC)
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Subject: svn commit: r207580 - head/sys/vm
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Author: kib
Date: Mon May  3 19:19:58 2010
New Revision: 207580
URL: http://svn.freebsd.org/changeset/base/207580

Log:
  Handle busy status of the page in a way expected for pager_getpage().
  Flush requested page, unbusy other pages, do not clear m->busy.
  
  Reviewed by:	alc
  MFC after:	1 week

Modified:
  head/sys/vm/phys_pager.c

Modified: head/sys/vm/phys_pager.c
==============================================================================
--- head/sys/vm/phys_pager.c	Mon May  3 18:39:40 2010	(r207579)
+++ head/sys/vm/phys_pager.c	Mon May  3 19:19:58 2010	(r207580)
@@ -152,10 +152,10 @@ phys_pager_getpages(vm_object_t object, 
 		KASSERT(m[i]->dirty == 0,
 		    ("phys_pager_getpages: dirty page %p", m[i]));
 		/* The requested page must remain busy, the others not. */
-		if (reqpage != i) {
-			m[i]->oflags &= ~VPO_BUSY;
-			m[i]->busy = 0;
-		}
+		if (i == reqpage)
+			vm_page_flash(m[i]);
+		else
+			vm_page_wakeup(m[i]);
 	}
 	return (VM_PAGER_OK);
 }