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 =
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