Track system boot using stap

[Frank Ch. Eigler]

Gaurav Poothia wrote:

> How can I track all the filesystem access made by system at boot
> time?  In other words when is the earliest I can launch stap with my
> stp script during bootup? [...] /etc/rc.local or
> /etc/rc.sysinit. [...]

Either of those should work.  Our colleague Dan Berrange has gone one
step farther <http://people.redhat.com/berrange/systemtap/bootprobe/>.
Plus we're planning to make it possible for a systemtap module to be
compiled right into a kernel boot image, so that it can probe the
kernel even before user-space init is run.

- FChE