On Tue, Apr 08, 2014 at 09:39:12AM +0200, Martin Husemann wrote: > On Tue, Apr 08, 2014 at 12:25:32AM -0400, Thor Lancelot Simon wrote: > > 2) Accumulate the output of kernel printf (as well as the times > > when it's called) and add this periodically. To avoid issues > > with recursion through diagnostic printfs, we use SHA512 to > > accumulate the printf output, then mix in its output. > > I wonder if we should make this part a compile time option (typically > defaulting to on for most architectures - but I haven't tried on > really the difference it makes for really slow machines). I do understand > that kernel output is rare post boot, so it might not be a big deal.
Even *at* boot time, kernel output is rare for the relevant definition of "rare" -- even on the slowest machine, hashing a couple of kilobytes wil take only a tiny fraction of a second. Thor
