[Libguestfs] [PATCH nbdkit v5 3/3] cache: Implement cache-max-size and cache space reclaim.

[Richard W.M. Jones]

v4:
https://www.redhat.com/archives/libguestfs/2019-January/msg00032.html

v5:

 - Now we set the block size at run time.

   I'd like to say that I was able to test this change, but
   unfortunately I couldn't find any easy way to create a filesystem
   on x86-64 with a block size > 4K.  Ext4 doesn't support it at all,
   and XFS doesn't support block size > page size (and I recently gave
   away my aarch64 machine that ran RHEL, so ..)

 - Addressed a few other minor issues that Eric found in v4.

 - Retested on Linux, FreeBSD and OpenBSD.

I'm including the minmax patch which I sent before.  That's because it
isn't independent as I thought it was - it depends on the LRU patch.

Rich.