Re: [PATCH 1/4] Add support for userspace stacktraces in tracing/iter_ctrl
From: Frank Ch. Eigler
Date: Sun Oct 26 2008 - 09:49:51 EST
Hi -
On Sun, Oct 26, 2008 at 03:38:45PM +0200, Török Edwin wrote:
> [...] In userspace I can get a stacktrace using DWARF unwind info,
> but doing that in the kernel would be too expensive, right? [...]
We're experimenting with just that in systemtap. The expenses
(memory: megabytes of unwind data, time: running code to process it)
would be paid only for the duration of a systemtap script that needs
that particular sort of information.
- FChE
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