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SubjectRe: [GIT PULL] PMEM driver for v4.1
On Wed, Apr 15, 2015 at 1:45 AM, Ingo Molnar <> wrote:
> * Dan Williams <> wrote:
>> > None of this gives me warm fuzzy feelings...
>> >
>> > ... has anyone explored the possibility of putting 'struct page'
>> > into the pmem device itself, essentially using it as metadata?
>> Yes, the impetus for proposing the pfn conversion of the block layer
>> was the consideration that persistent memory may have less write
>> endurance than DRAM. The kernel preserving write endurance
>> exclusively for user data and the elimination of struct page
>> overhead motivated the patchset [1].
>> [1]:
> (Is there a Git URL where I could take a look at these patches?)


Note that the bulk of the change is automated via Coccinelle.

For v2, I'm looking at enabling a kmap primitive to operate on a
pfn_t, kmap_pfn().

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