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atomic_set_8 isn't MI. Instead, follow Jake's suggestions about

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ZONE_LOCK.
This commit is contained in:
Matt Jacob 2002-11-11 11:50:03 +00:00
parent 34fa8213c3
commit 81f71edaec
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=106773
3 changed files with 7 additions and 5 deletions
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4
sys/vm/uma_core.c
View file

@ -1348,7 +1348,9 @@ uma_zalloc_arg(uma_zone_t zone, void *udata, int flags)
("uma_zalloc: Bucket pointer mangled."));
cache->uc_allocs++;
#ifdef INVARIANTS
ZONE_LOCK(zone);
uma_dbg_alloc(zone, NULL, item);
ZONE_UNLOCK(zone);
#endif
CPU_UNLOCK(zone, cpu);
if (zone->uz_ctor)
@ -1698,10 +1700,12 @@ uma_zfree_arg(uma_zone_t zone, void *item, void *udata)
("uma_zfree: Freeing to non free bucket index."));
bucket->ub_bucket[bucket->ub_ptr] = item;
#ifdef INVARIANTS
ZONE_LOCK(zone);
if (zone->uz_flags & UMA_ZFLAG_MALLOC)
uma_dbg_free(zone, udata, item);
else
uma_dbg_free(zone, NULL, item);
ZONE_UNLOCK(zone);
#endif
CPU_UNLOCK(zone, cpu);
return;

6
sys/vm/uma_dbg.c
View file

@ -199,9 +199,7 @@ uma_dbg_getslab(uma_zone_t zone, void *item)
if (zone->uz_flags & UMA_ZFLAG_MALLOC) {
slab = vtoslab((vm_offset_t)mem);
} else if (zone->uz_flags & UMA_ZFLAG_HASH) {
ZONE_LOCK(zone);
slab = hash_sfind(&zone->uz_hash, mem);
ZONE_UNLOCK(zone);
} else {
mem += zone->uz_pgoff;
slab = (uma_slab_t)mem;
@ -230,7 +228,7 @@ uma_dbg_alloc(uma_zone_t zone, uma_slab_t slab, void *item)
freei = ((unsigned long)item - (unsigned long)slab->us_data)
/ zone->uz_rsize;
atomic_set_8(&slab->us_freelist[freei], 255);
slab->us_freelist[freei] = 255;
return;
}
@ -279,5 +277,5 @@ uma_dbg_free(uma_zone_t zone, uma_slab_t slab, void *item)
* Until then the count of valid slabs will make sure we don't
* accidentally follow this and assume it's a valid index.
*/
atomic_set_8(&slab->us_freelist[freei], 0);
slab->us_freelist[freei] = 0;
}

2
sys/vm/vm_object.c
View file

@ -225,7 +225,7 @@ _vm_object_allocate(objtype_t type, vm_pindex_t size, vm_object_t object)
object->hash_rand = exp - 129;
} while (!atomic_cmpset_int(&object_hash_rand, exp, object->hash_rand));
object->generation++; /* atomicity needed? XXX */
atomic_add_int(&object->generation, 1);
mtx_lock(&vm_object_list_mtx);
TAILQ_INSERT_TAIL(&vm_object_list, object, object_list);