On Wed, 21 Nov 2018, Tim Chen wrote:
Is it reverted in Linus's tree? If not, then anything that comes "later on" will not apply here, right?
I see the thread asking about this, but I got really conflicting messages here, and now it's in all of the latest releases, and no testing seems to have uncovered issues. Is it just a "slow down" problem?
Greg,
It could be a big slow down in excess of 20% for some applications. And cross sibling Spectre v2 attack is quite hard to pull off.
So till we have the accompanying patchset that only apply STIBP on processes that really need it instead of universally, it should be withheld from stable.
Agreed; it will be trivially reintroduced with the rest, once it's ready. It's being built on top of that patch.
Thanks,