Re: [patch 06/21] Xen-paravirt: remove ctor for pgd cache

[Zachary Amsden]

Jeremy Fitzhardinge wrote:
 
@@ -261,10 +261,12 @@ void pgd_ctor(void *pgd, struct kmem_cac
        spin_unlock_irqrestore(&pgd_lock, flags);
 }
 
-/* never called when PTRS_PER_PMD > 1 */
-void pgd_dtor(void *pgd, struct kmem_cache *cache, unsigned long unused)
+static void pgd_dtor(pgd_t *pgd)
 {
        unsigned long flags; /* can be called from interrupt context */
+
+       if (PTRS_PER_PMD == 1)
+               return;
 
 	paravirt_release_pd(__pa(pgd) >> PAGE_SHIFT);
        spin_lock_irqsave(&pgd_lock, flags);
  


Acked, with exceptions.  This bit breaks VMI.  The paravirt_release_pd 
must happen unconditionally.  But I would rather fix it after patches 
get applied just to make sure the entire allocation / deallocation order 
constraints are intact.

Zach
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