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From: Alan Cox <alc@FreeBSD.org>
Date: Fri, 13 Feb 2015 19:58:54 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r278697 - head/sys/kern
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Author: alc
Date: Fri Feb 13 19:58:53 2015
New Revision: 278697
URL: https://svnweb.freebsd.org/changeset/base/278697

Log:
  Preset the object's color, or alignment, to maximize superpage usage.
  
  MFC after:	5 days

Modified:
  head/sys/kern/sysv_shm.c

Modified: head/sys/kern/sysv_shm.c
==============================================================================
--- head/sys/kern/sysv_shm.c	Fri Feb 13 19:52:16 2015	(r278696)
+++ head/sys/kern/sysv_shm.c	Fri Feb 13 19:58:53 2015	(r278697)
@@ -706,9 +706,10 @@ shmget_allocate_segment(td, uap, mode)
 #endif
 		return (ENOMEM);
 	}
+	shm_object->pg_color = 0;
 	VM_OBJECT_WLOCK(shm_object);
 	vm_object_clear_flag(shm_object, OBJ_ONEMAPPING);
-	vm_object_set_flag(shm_object, OBJ_NOSPLIT);
+	vm_object_set_flag(shm_object, OBJ_COLORED | OBJ_NOSPLIT);
 	VM_OBJECT_WUNLOCK(shm_object);
 
 	shmseg->object = shm_object;