[sheepdog] [PATCH 1/6] sheep: redesign a new cached sockfd pool

[Christoph Hellwig]

I've not been fully through this series, but two comments:

 - we absolutely need the split out struct node_id as a preparatory
   patch before adding the new sockfd cache.  Letting the casting mess
   get in first and clean up later will be way more work.
   This will also have various advantages like cleaning up the existing
   qsort/bsearch callbacks.
 - I've previously been non-exited about more liburcu use, but for
   a cache like this which gets hit by all threads I don't think
   using the slow sleeping pthread locks is a good idea.  We need
   a lockless reader algorithm for this cache as soon as possible.