On Thu, 29 Nov 2018 09:35:11 -0800 Linus Torvalds <torva...@linux-foundation.org> wrote:
> On Thu, Nov 29, 2018 at 9:13 AM Steven Rostedt <rost...@goodmis.org> wrote: > > > > No, we really do need to sync after we change the second part of the > > command with the int3 on it. Unless there's another way to guarantee > > that the full instruction gets seen when we replace the int3 with the > > finished command. > > Making sure the call instruction is aligned with the I$ fetch boundary > should do that. > > It's not in the SDM, but neither was our current behavior - we > were/are just relying on "it will work". > Well, the current method (as Jiri mentioned) did get the OK from at least Intel (and that was with a lot of arm twisting to do so). -- Steve
