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SubjectRe: [PATCH tracing/kprobes 0/7] tracing/kprobes: kprobe-based event tracer update and perf support
On Fri, Sep 11, 2009 at 03:03:35PM -0400, Frank Ch. Eigler wrote:
> Frederic Weisbecker <fweisbec@gmail.com> 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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