[libvirt] [PATCH 00/13] Add multiple trace backend function and add new ftrace backend for libvirt

[Frank Ch. Eigler]

Hi -

On Tue, Mar 18, 2014 at 05:14:38AM +0000, yangzy.fnst at cn.fujitsu.com wrote:
> > [...]
> > (For what it's worth, there are several different ways of executing systemtap
> > scripts automatically at startup.  There is an initscript.
> > With the next version, its docs will move into 'man 8 systemtap', and grows a
> > new 'onboot' option, to modules load even earlier at initramfs time via dracut.)
>
> What 'onboot' option it is ?

It allows designated systemtap scripts (in the form of precompiled
modules) to be loaded during early boot; coming in stap v2.5.


> BTW, do you mean that ftrace backend is not necessary for libvirt now?

I have no opinion on that.

> Can it generate systemtap script automatically and load the module
> on boot time without users operation?

Yes.


> We think adding multiple trace backends can provide more trace
> interfaces for the upper tool which is based on libvirt.  Developer
> can chose more compatible trace scheme according to the actual
> situation with more flexibility . [...]

OK, I have no opinion on that.  I simply wanted to point out the
current capabilities of the stap initscript.


- FChE