Revert "OS-8005 bhyve memory pressure needs to target ARC better (#354)"
This reverts commit a6033573eedd94118d2b9e65f45deca0bf4b42f7.

@@ -10,11 +10,11 @@
  */
 /* This file is dual-licensed; see usr/src/contrib/bhyve/LICENSE */
 
 /*
  * Copyright 2015 Pluribus Networks Inc.
- * Copyright 2020 Joyent, Inc.
+ * Copyright 2019 Joyent, Inc.
  * Copyright 2020 OmniOS Community Edition (OmniOSce) Association.
  * Copyright 2021 Oxide Computer Company
  */
 
 #include <sys/types.h>

@@ -474,11 +474,10 @@
         case VM_ALLOC_MEMSEG:
         case VM_MMAP_MEMSEG:
         case VM_MUNMAP_MEMSEG:
         case VM_WRLOCK_CYCLE:
         case VM_PMTMR_LOCATE:
-        case VM_ARC_RESV:
                 vmm_write_lock(sc);
                 lock_type = LOCK_WRITE_HOLD;
                 break;
 
         case VM_GET_GPA_PMAP:

@@ -1410,13 +1409,11 @@
                  * Present a test mechanism to acquire/release the write lock
                  * on the VM without any other effects.
                  */
                 break;
         }
-        case VM_ARC_RESV:
-                error = vm_arc_resv(sc->vmm_vm, (uint64_t)arg);
-                break;
+
         default:
                 error = ENOTTY;
                 break;
         }
 

@@ -2187,11 +2184,11 @@
                 r = ENXIO;
                 msg = "Unsupported CPU vendor";
         }
 
         if (r != 0 && arg != (intptr_t)NULL) {
-                if (copyoutstr(msg, (char *)arg, strlen(msg), NULL) != 0)
+                if (copyoutstr(msg, (char *)arg, strlen(msg) + 1, NULL) != 0)
                         return (EFAULT);
         }
         return (r);
 }