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Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into KVA

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On 08/13/2015 07:48 AM, Boaz Harrosh wrote:
> There is already an object that holds a relationship of physical
> to Kernel-virtual. It is called a memory-section. Why not just
> widen its definition?

Memory sections are purely there to map physical address ranges back to
metadata about them.  *Originally* for 'struct page', but widened a bit
subsequently.  But, it's *never* been connected to kernel-virtual
addresses in any way that I can think of.

So, that's a curious statement.
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[PATCH v5 0/5] introduce __pfn_t for unmapped pfn I/O and DAX  lifetime Dan Williams <dan.j.williams@intel.com> - 2015-08-13 05:10 +0200
  [PATCH v5 1/5] mm: move __phys_to_pfn and __pfn_to_phys to  asm/generic/memory_model.h Dan Williams <dan.j.williams@intel.com> - 2015-08-13 05:10 +0200
  [PATCH v5 5/5] scatterlist: convert to __pfn_t Dan Williams <dan.j.williams@intel.com> - 2015-08-13 05:10 +0200
  [PATCH v5 3/5] dax: drop size parameter to ->direct_access() Dan Williams <dan.j.williams@intel.com> - 2015-08-13 05:10 +0200
  [PATCH v5 2/5] allow mapping page-less memremaped areas into KVA Dan Williams <dan.j.williams@intel.com> - 2015-08-13 05:10 +0200
    Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into  KVA Boaz Harrosh <boaz@plexistor.com> - 2015-08-13 08:00 +0200
      Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into KVA Dan Williams <dan.j.williams@intel.com> - 2015-08-13 15:00 +0200
        Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into  KVA Boaz Harrosh <boaz@plexistor.com> - 2015-08-13 15:30 +0200
          Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into  KVA Christoph Hellwig <hch@lst.de> - 2015-08-13 16:50 +0200
            Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into  KVA Boaz Harrosh <boaz@plexistor.com> - 2015-08-13 17:10 +0200
      Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into  KVA Christoph Hellwig <hch@lst.de> - 2015-08-13 16:40 +0200
        Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into  KVA Boaz Harrosh <boaz@plexistor.com> - 2015-08-13 16:50 +0200
          Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into  KVA Boaz Harrosh <boaz@plexistor.com> - 2015-08-13 17:30 +0200
          Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into  KVA Dave Hansen <dave@sr71.net> - 2015-08-13 19:40 +0200
    Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into KVA Matthew Wilcox <willy@linux.intel.com> - 2015-08-13 19:40 +0200
      Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into KVA Dan Williams <dan.j.williams@intel.com> - 2015-08-13 20:20 +0200
  [PATCH v5 4/5] dax: fix mapping lifetime handling,  convert to __pfn_t + kmap_atomic_pfn_t() Dan Williams <dan.j.williams@intel.com> - 2015-08-13 05:10 +0200
    Re: [PATCH v5 4/5] dax: fix mapping lifetime handling, convert to  __pfn_t + kmap_atomic_pfn_t() Boaz Harrosh <boaz@plexistor.com> - 2015-08-13 08:30 +0200
      Re: [PATCH v5 4/5] dax: fix mapping lifetime handling, convert to  __pfn_t + kmap_atomic_pfn_t() Dan Williams <dan.j.williams@intel.com> - 2015-08-13 17:30 +0200
        Re: [PATCH v5 4/5] dax: fix mapping lifetime handling, convert to  __pfn_t + kmap_atomic_pfn_t() Boaz Harrosh <boaz@plexistor.com> - 2015-08-13 18:40 +0200
          Re: [PATCH v5 4/5] dax: fix mapping lifetime handling, convert to  __pfn_t + kmap_atomic_pfn_t() Dan Williams <dan.j.williams@intel.com> - 2015-08-13 21:00 +0200

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