void
amap_wipeout(struct vm_amap *amap)
{
int lcv, slot;
struct vm_anon *anon;
KASSERT(amap->am_ref == 0);
if (__predict_false((amap->am_flags & AMAP_SWAPOFF) != 0)) {
/* amap_swap_off will call us again. */
return;
}
amap_list_remove(amap);
for (lcv = 0 ; lcv < amap->am_nused ; lcv++) {
int refs;
slot = amap->am_slots[lcv];
anon = amap->am_anon[slot];
if (anon == NULL || anon->an_ref == 0)
panic("amap_wipeout: corrupt amap");
refs = --anon->an_ref;
if (refs == 0) {
/* we had the last reference to a vm_anon. free it. */
uvm_anfree(anon);
}
}
/* now we free the map */
amap->am_ref = 0; /* ... was one */
amap->am_nused = 0;
amap_free(amap); /* will free amap */
}
void
amap_wipeout(struct vm_amap *amap)
{
int lcv, slot;
struct vm_anon *anon;
UVMHIST_FUNC("amap_wipeout"); UVMHIST_CALLED(maphist);
UVMHIST_LOG(maphist,"(amap=0x%x)", amap, 0,0,0);
KASSERT(amap->am_ref == 0);
if (__predict_false((amap->am_flags & AMAP_SWAPOFF) != 0)) {
/*
* amap_swap_off will call us again.
*/
amap_unlock(amap);
return;
}
amap_list_remove(amap);
amap_unlock(amap);
for (lcv = 0 ; lcv < amap->am_nused ; lcv++) {
int refs;
slot = amap->am_slots[lcv];
anon = amap->am_anon[slot];
if (anon == NULL || anon->an_ref == 0)
panic("amap_wipeout: corrupt amap");
mutex_enter(&anon->an_lock);
UVMHIST_LOG(maphist," processing anon 0x%x, ref=%d", anon,
anon->an_ref, 0, 0);
refs = --anon->an_ref;
mutex_exit(&anon->an_lock);
if (refs == 0) {
/*
* we had the last reference to a vm_anon. free it.
*/
uvm_anfree(anon);
}
if (curlwp->l_cpu->ci_schedstate.spc_flags & SPCF_SHOULDYIELD)
preempt();
}
/*
* now we free the map
*/
amap->am_nused = 0;
amap_free(amap); /* will unlock and free amap */
UVMHIST_LOG(maphist,"<- done!", 0,0,0,0);
}