Re: [PATCH] x86/retpoline: Fill return stack buffer on vmexit

From: David Lang
Date: Wed Jan 10 2018 - 18:23:58 EST


I somewhat hate to ask this, but for those of us following at home, what does this add to the overhead?

I am remembering an estimate from mid last week that put retpoline at replacing a 3 clock 'ret' with 30 clocks of eye-bleed code