diff options
Diffstat (limited to 'sys/vm/vm_page.c')
| -rw-r--r-- | sys/vm/vm_page.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index e70ca3f5c514..1c877d932c28 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -2336,10 +2336,12 @@ vm_page_cowsetup(vm_page_t m) { vm_page_lock_assert(m, MA_OWNED); - if (m->cow == USHRT_MAX - 1) + if ((m->flags & (PG_FICTITIOUS | PG_UNMANAGED)) != 0 || + m->cow == USHRT_MAX - 1 || !VM_OBJECT_TRYLOCK(m->object)) return (EBUSY); m->cow++; pmap_remove_write(m); + VM_OBJECT_UNLOCK(m->object); return (0); } |