Re: [PATCH v4 2/2] kvm: Use huge pages for DAX-backed files

From: Barret Rhoden
Date: Thu Dec 12 2019 - 12:03:42 EST

On 12/12/19 7:33 AM, Liran Alon wrote:
+ /*
+ * Our caller grabbed the KVM mmu_lock with a successful
+ * mmu_notifier_retry, so we're safe to walk the page table.
+ */
+ switch (dev_pagemap_mapping_shift(hva, current->mm)) {
Doesnât dev_pagemap_mapping_shift() get âstruct pageâ as first parameter?
Was this changed by a commit I missed?

I changed this in Patch 1. The place I call it in KVM has the address and mm available, which is the only think dev_pagemap_mapping_shift() really needs. (The first thing it did was convert page to address).

I'll add some more text to patch 1's commit message about that.