svn commit: r278402 - head/sys/kern

[Alan Cox]

Author: alc
Date: Sun Feb  8 21:00:51 2015
New Revision: 278402
URL: https://svnweb.freebsd.org/changeset/base/278402

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

Modified:
  head/sys/kern/uipc_shm.c

Modified: head/sys/kern/uipc_shm.c
==============================================================================
--- head/sys/kern/uipc_shm.c	Sun Feb  8 20:48:17 2015	(r278401)
+++ head/sys/kern/uipc_shm.c	Sun Feb  8 21:00:51 2015	(r278402)
@@ -531,9 +531,10 @@ shm_alloc(struct ucred *ucred, mode_t mo
 	shmfd->shm_object = vm_pager_allocate(OBJT_DEFAULT, NULL,
 	    shmfd->shm_size, VM_PROT_DEFAULT, 0, ucred);
 	KASSERT(shmfd->shm_object != NULL, ("shm_create: vm_pager_allocate"));
+	shmfd->shm_object->pg_color = 0;
 	VM_OBJECT_WLOCK(shmfd->shm_object);
 	vm_object_clear_flag(shmfd->shm_object, OBJ_ONEMAPPING);
-	vm_object_set_flag(shmfd->shm_object, OBJ_NOSPLIT);
+	vm_object_set_flag(shmfd->shm_object, OBJ_COLORED | OBJ_NOSPLIT);
 	VM_OBJECT_WUNLOCK(shmfd->shm_object);
 	vfs_timestamp(&shmfd->shm_birthtime);
 	shmfd->shm_atime = shmfd->shm_mtime = shmfd->shm_ctime =