svn commit: r324173 - head/sys/vm

[Alan Cox]

Author: alc
Date: Sun Oct  1 17:04:26 2017
New Revision: 324173
URL: https://svnweb.freebsd.org/changeset/base/324173

Log:
  When an I/O error occurs on page out, there is no need to dirty the page,
  because it is already dirty.  Instead, assert that the page is dirty.
  
  Reviewed by:	kib, markj
  MFC after:	1 week

Modified:
  head/sys/vm/swap_pager.c

Modified: head/sys/vm/swap_pager.c
==============================================================================
--- head/sys/vm/swap_pager.c	Sun Oct  1 16:59:02 2017	(r324172)
+++ head/sys/vm/swap_pager.c	Sun Oct  1 17:04:26 2017	(r324173)
@@ -1524,7 +1524,7 @@ swp_pager_async_iodone(struct buf *bp)
 				 * so it doesn't clog the inactive list,
 				 * then finish the I/O.
 				 */
-				vm_page_dirty(m);
+				MPASS(m->dirty == VM_PAGE_BITS_ALL);
 				vm_page_lock(m);
 				vm_page_activate(m);
 				vm_page_unlock(m);