Subject: Re: SMP re-entrancy in kernel drivers/"bottom half?"
To: None <jonathan@dsg.stanford.edu>
From: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
List: tech-kern
Date: 02/24/2005 11:03:11
hi,
> On a related note, thinking about SMP, run-to-completion, and i386: I
> queried whether we avoid whacking CR0 when switching from one
> kernel-only thread to another. I'm told we used to, but that
> optimization got lost during the LWP/sa changes. It's being worked on.
(assuming you meant cr3,) our current code defer switching until
it's needed.
YAMAMOTO Takashi