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From: Jeff Roberson <jeff@FreeBSD.org>
Date: Sun, 11 Mar 2018 00:07:14 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-user@freebsd.org
Subject: svn commit: r330751 - user/jeff/numa/sys/vm
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Author: jeff
Date: Sun Mar 11 00:07:14 2018
New Revision: 330751
URL: https://svnweb.freebsd.org/changeset/base/330751

Log:
  This branch requires the vm page to be locked before free_prep.
  
  Reported by:	pho

Modified:
  user/jeff/numa/sys/vm/vm_page.c

Modified: user/jeff/numa/sys/vm/vm_page.c
==============================================================================
--- user/jeff/numa/sys/vm/vm_page.c	Sat Mar 10 23:47:03 2018	(r330750)
+++ user/jeff/numa/sys/vm/vm_page.c	Sun Mar 11 00:07:14 2018	(r330751)
@@ -3374,8 +3374,10 @@ vm_page_free_pages_toq(struct spglist *free, bool upda
 	while ((m = SLIST_FIRST(free)) != NULL) {
 		count++;
 		SLIST_REMOVE_HEAD(free, plinks.s.ss);
+		vm_page_lock(m);
 		if (vm_page_free_prep(m, false))
 			TAILQ_INSERT_TAIL(&pgl, m, listq);
+		vm_page_unlock(m);
 	}
 
 	vm_page_free_phys_pglist(&pgl);