Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

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Description of problem:

Nir Soffer made some important optimizations to the nbdkit
file plugin which we should include in RHEL 7.7.

These enhance support for fast zeroing of byte ranges in files and
block devices:

https://github.com/libguestfs/nbdkit/commit/77ecf4bdcb9926d5b411363143792aec9b160361
https://github.com/libguestfs/nbdkit/commit/757f5259835d5ae260465f9e767ff97a5f8ff6b0
https://github.com/libguestfs/nbdkit/commit/407f8ddea1e136eca9663f599cac07fdc34314c7
https://github.com/libguestfs/nbdkit/commit/9690b271de1850a90ca5fef387cf27423f720f17

Note this is available in RHEL 7.6-lp.

Fixed by the rebase in RHEL 7.7.

*** This bug has been marked as a duplicate of bug 1621894 ***