From: Matthew Dillon <dillon@apollo.backplane.com>
Date: Thu, 8 Jul 2010 05:15:05 +0000 (-0700)
Subject: kernel - skip PG_MARKER vm pages.
X-Git-Tag: v2.8.0~785
X-Git-Url: http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/ac2c8895a1f9bb9dcbf34e5847a2085c4383d19b

kernel - skip PG_MARKER vm pages.

* The contigmalloc code was improperly interpreting PG_MARKER
  VM pages, resulting in an infinite blocking condition.
---

diff --git a/sys/vm/vm_contig.c b/sys/vm/vm_contig.c
index 6a2e90e..a65024d 100644
--- a/sys/vm/vm_contig.c
+++ b/sys/vm/vm_contig.c
@@ -153,6 +153,9 @@ vm_contig_pg_clean(int queue)
 			("vm_contig_clean: page %p's queue is not %d", 
 			m, queue));
 		next = TAILQ_NEXT(m, pageq);
+
+		if (m->flags & PG_MARKER)
+			continue;
 		
 		if (vm_page_sleep_busy(m, TRUE, "vpctw0"))
 			return (TRUE);