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Preset the object's color, or alignment, to maximize superpage usage.

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MFC after:	5 days
This commit is contained in:
Alan Cox 2015-02-08 21:00:51 +00:00
parent d5153415b8
commit f4c6aea395
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=278402
1 changed files with 2 additions and 1 deletions
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3
sys/kern/uipc_shm.c
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@ -531,9 +531,10 @@ shm_alloc(struct ucred *ucred, mode_t mode)
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 =