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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 18 Nov 2016 08:59:47 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r308800 - stable/11/sys/vm
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Author: kib
Date: Fri Nov 18 08:59:47 2016
New Revision: 308800
URL: https://svnweb.freebsd.org/changeset/base/308800

Log:
  MFC r308288:
  Do not sleep in vm_wait() if pagedaemon did not yet started.  Panic instead.

Modified:
  stable/11/sys/vm/vm_page.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/vm/vm_page.c
==============================================================================
--- stable/11/sys/vm/vm_page.c	Fri Nov 18 08:15:45 2016	(r308799)
+++ stable/11/sys/vm/vm_page.c	Fri Nov 18 08:59:47 2016	(r308800)
@@ -2744,6 +2744,8 @@ vm_wait(void)
 		msleep(&vm_pageout_pages_needed, &vm_page_queue_free_mtx,
 		    PDROP | PSWP, "VMWait", 0);
 	} else {
+		if (__predict_false(pageproc == NULL))
+			panic("vm_wait in early boot");
 		if (!vm_pageout_wanted) {
 			vm_pageout_wanted = true;
 			wakeup(&vm_pageout_wanted);