= bionic verification =
After running cert:

ubuntu@d06-4:~$ cat /proc/version
Linux version 4.15.0-47-generic (buildd@bos02-arm64-022) (gcc version 7.3.0 
(Ubuntu/Linaro 7.3.0-16ubuntu3)) #50-Ubuntu SMP Wed Mar 13 10:42:02 UTC 2019
ubuntu@d06-4:~$ dmesg | grep CMD_SYNC

** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic

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Packages, which is subscribed to linux in Ubuntu.

  arm-smmu-v3 arm-smmu-v3.3.auto: CMD_SYNC timeout

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed
Status in linux source package in Cosmic:
  Fix Committed

Bug description:
  During heavy load, the following message may appear on the console of a 
HiSilicon D06 system:

  arm-smmu-v3 arm-smmu-v3.3.auto: CMD_SYNC timeout

  This is due to a bug that can also impact system performance, as the
  CPU is blocked until the timeout occurs.

  [Test Case]
  The Ubuntu server certification test suite hits this pretty reliably during 
the stress-ng tests, although I haven't narrowed it down to exactly which test 

  0f02477d16980 iommu/arm-smmu-v3: Fix unexpected CMD_SYNC timeout

  [Regression Risk]
  Limited to arm64 systems. This change has been upstream since 4.20 w/o any 
noticed regressions (based on lack of Fixes: commits). Regressions could 
manifest as a performance hit.

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