Re: [PATCH] Linux Kernel Markers

[Martin Bligh]

Frank Ch. Eigler wrote:
> Martin Bligh <mbligh@xxxxxxxxxx> writes:
>
>
> > [...]  "compiled anew from original sources after deployment" seems
> > the most practical to do to me.  From second hand info on using
> > systemtap, you seem to need the same compiler and source tree to
> > work from anyway [...]
>
>
> Not quite.  Systemtap does not look at sources, only object code and
> its embedded debugging information.  (How many distributions keep
> around compilable source trees?)

???? Boggle. Any distro that cannot find the source code for it's kernel
deserves a swift kick to the head, plus a red hot poker somewhere else.

> > [...] It seems like all we'd need to do is "list all references to
> > function, freeze kernel, update all references, continue", [...]
>
> One additional problem are external references made *by* the function.
> Those too would all have to be relocated to the live data.

Not sure what you mean ... could you give a quick example?

> Live code patching is theoretically useful for all kinds of things,
> but I've never heard it described as relatively simple before! :-)

well, on a whole-function basis, it seems somewhat simpler.

M.
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