And vendors who put ECC on the data paths but not on the cache itself, on the assumption that check it while it is going in, its a cache so it is short lived, a

And vendors who put ECC on the data paths but not on the cache itself, on the assumption that check it while it is going in, its a cache so it is short lived, and you're window is small enough to meet your reliability goals. That goes out the window when you sleep though because you don't know how long you've been waiting to restart. And the P(bitflip) is a function of time. If you sleep too long you are non-spec compliant for silent data corruption, and since there isn't a way to know how long you sleep, the only "safe" option is to invalidate the cache and reload it. Sad but an understandable approach. The downside is your wake from sleep is slower by the amount of time it takes to warm up the cache.