Re: [PATCH -V2] powerpc/kvm: Handle transparent hugepage in KVM
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2013-06-20 04:57:07
On Thu, 2013-06-20 at 10:11 +0530, Aneesh Kumar K.V wrote:
+ while (1) {
+ old_pte = pte_val(*ptep);
+ /*
+ * wait until _PAGE_BUSY is clear then set it
atomically
+ */
+ if (unlikely(old_pte & _PAGE_BUSY))
+ continue;
+Add a cpu_relax... Cheers, Ben.