Re: [Qemu-devel] [PATCH V5 0/9] nvdimm: guarantee persistence of QEMU writes to persistent memory

[Stefan Hajnoczi <stefanha@gmail.com>]

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David Gilbert previously suggested a memory access interface.  I guess
it would look something like this:

  typedef struct {
      void (*memset)(void *s, int c, size_t n);
      void (*memcpy)(void *dest, const void *src, size_t n);
  } MemoryOperations;

That way code doesn't need if (pmem) A else B.  It can just do
mem_ops->foo().  Have you looked into this idea?

Also, there was a discussion about leaving the code unchanged but adding
an nvdimm_flush() call at the very end of migration.  I think someone
benchmarked it but can't find the email.  Please post a link or
summarize the results, because that approach would be much less
invasive.  Thanks!

Stefan

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