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Re: [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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[PATCH v2 0/5] block, dax: updates for 4.4 Dan Williams <dan.j.williams@intel.com> - 2015-10-22 19:20 +0200
  [PATCH v2 5/5] block: enable dax for raw block devices Dan Williams <dan.j.williams@intel.com> - 2015-10-22 19:20 +0200
    Re: [PATCH v2 5/5] block: enable dax for raw block devices Jeff Moyer <jmoyer@redhat.com> - 2015-10-28 22:00 +0100
      Re: [PATCH v2 5/5] block: enable dax for raw block devices Dan Williams <dan.j.williams@intel.com> - 2015-10-29 08:20 +0100
  [PATCH v2 4/5] block: introduce bdev_file_inode() Dan Williams <dan.j.williams@intel.com> - 2015-10-22 19:20 +0200
    Re: [PATCH v2 4/5] block: introduce bdev_file_inode() Jan Kara <jack@suse.cz> - 2015-10-22 22:40 +0200
    Re: [PATCH v2 4/5] block: introduce bdev_file_inode() Jeff Moyer <jmoyer@redhat.com> - 2015-10-28 21:20 +0100
  [PATCH v2 3/5] block,  dax: fix lifetime of in-kernel dax mappings with dax_map_atomic() Dan Williams <dan.j.williams@intel.com> - 2015-10-22 19:20 +0200
    Re: [PATCH v2 3/5] block, dax: fix lifetime of in-kernel dax mappings with dax_map_atomic() Jeff Moyer <jmoyer@redhat.com> - 2015-10-28 21:20 +0100
  [PATCH v2 2/5] dax: increase granularity of dax_clear_blocks()  operations Dan Williams <dan.j.williams@intel.com> - 2015-10-22 19:20 +0200
    Re: [PATCH v2 2/5] dax: increase granularity of dax_clear_blocks() operations Jeff Moyer <jmoyer@redhat.com> - 2015-10-22 23:10 +0200
      Re: [PATCH v2 2/5] dax: increase granularity of dax_clear_blocks()  operations "Williams, Dan J" <dan.j.williams@intel.com> - 2015-10-23 01:00 +0200
        Re: [PATCH v2 2/5] dax: increase granularity of dax_clear_blocks() operations Jeff Moyer <jmoyer@redhat.com> - 2015-10-28 22:10 +0100
  [PATCH v2 1/5] pmem, dax: clean up clear_pmem() Dan Williams <dan.j.williams@intel.com> - 2015-10-22 19:20 +0200
    Re: [PATCH v2 1/5] pmem, dax: clean up clear_pmem() Jeff Moyer <jmoyer@redhat.com> - 2015-10-22 22:50 +0200
      Re: [PATCH v2 1/5] pmem, dax: clean up clear_pmem() Dan Williams <dan.j.williams@intel.com> - 2015-10-23 00:30 +0200
        Re: [PATCH v2 1/5] pmem, dax: clean up clear_pmem() Jeff Moyer <jmoyer@redhat.com> - 2015-10-28 22:10 +0100
    Re: [PATCH v2 1/5] pmem, dax: clean up clear_pmem() Ross Zwisler <ross.zwisler@linux.intel.com> - 2015-10-27 18:40 +0100

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