[Midnightbsd-cvs] [MidnightBSD/src] 8b1893: MFZoL: Fix issue with scanning dedup blocks as sca...

[Lucas Holt]

  Branch: refs/heads/master
  Home:   https://github.com/MidnightBSD/src
  Commit: 8b1893b1ecb09ba52e58871c04672f22e74da4d6
      https://github.com/MidnightBSD/src/commit/8b1893b1ecb09ba52e58871c04672f22e74da4d6
  Author: Lucas Holt <luke at foolishgames.com>
  Date:   2020-11-15 (Sun, 15 Nov 2020)

  Changed paths:
    M sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c

  Log Message:
  -----------
  MFZoL: Fix issue with scanning dedup blocks as scan ends

This patch fixes an issue discovered by ztest where
dsl_scan_ddt_entry() could add I/Os to the dsl scan queues
between when the scan had finished all required work and
when the scan was marked as complete. This caused the scan
to spin indefinitely without ending.