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SubjectRe: [PATCH v2 5/5] block: enable dax for raw block devices
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On Thu, Oct 29, 2015 at 5:50 AM, Jeff Moyer <jmoyer@redhat.com> wrote:
> Dan Williams <dan.j.williams@intel.com> writes:
>
>> If an application wants exclusive access to all of the persistent memory
>> provided by an NVDIMM namespace it can use this raw-block-dax facility
>> to forgo establishing a filesystem. This capability is targeted
>> primarily to hypervisors wanting to provision persistent memory for
>> guests.
>
> OK, I'm going to expose my ignorance here. :) Why does the block device
> need a page_mkwrite handler?
>

You're right, it buys us nothing, and deleting it saves having to
comment on why this page_mkwrite instance is not calling
sb_start_pagefault.


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