Re: [PATCH tracing/kprobes 0/7] tracing/kprobes: kprobe-basedevent tracer update and perf support
From: Christoph Hellwig
Date: Fri Sep 11 2009 - 15:07:15 EST
On Fri, Sep 11, 2009 at 03:03:35PM -0400, Frank Ch. Eigler wrote:
>
Frederic Weisbecker <fweisbec@xxxxxxxxx> writes:
>
>
> [...] I'm really looking forward seeing this C expression-like
>
> kprobe creation tool. It seems powerful enough to replace printk +
>
> kernel rebuild. No need anymore to write some printk to debug,
>
> worrying, [...]
>
>
To a large extent, systemtap had delivered this already some years
>
ago, including the cushy ponies dancing in the sunlight. While such
>
low-level machinery is fine, some of our experience indicates that it
>
is dramatically easier to use if high-level, symbolic, debugging data
>
is used to compute probe locations and variable names/types/locations.
No, systemtap has been for years failing to delivers this in a way that
it could be usefully integrated into the kernel. Masami's patches are
exactly the kind of low-level functionality we absolutely need in the
kernel tree so that we can built more useful higherlevel tools ontop
of this.
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