Is there going to be any kind of post-mortem analysis of how this happened? The changelogs indicate that this entered oldstable-proposed-updates around 4 December. I’m not quite sure when it entered oldstable-updates or if it ever formally entered oldstable-updates prior to being incorporated into the 8.10 release on 9 December.
I would not call 5 days an “extended testing period” as promised by the proposed-updates mechanism. https://www.debian.org/releases/proposed-updates.html It would also be helpful if you clearly stated whether this (a) affects all multi-socket systems and (b) whether it affected any single-socket systems. Between the sample bias of bug reports themselves and the “fog of war” neither conclusion is clear. Yours, -- Tom Downes Senior Scientist Center for Gravitation, Cosmology and Astrophysics 414.229.2678