On Thu, Mar 11, 2021 at 09:42:05AM +0100, Peter Zijlstra wrote: > On Thu, Mar 11, 2021 at 05:36:06AM +0200, Jarkko Sakkinen wrote: > > Does it do any harm to put it there unconditionally? > > Blows up your text footprint and I$ pressure. These instructions are 4 > bytes each. > > Aside from that, they're a NOP, so only consume front-end resources > (hopefully) on older CPUs and when IBT is disabled. OK, understood, thanks for the explanation. /Jarkko
