Re: [PATCH 3/3] utrace-based ftrace process engine, v2

2009-03-22 Thread Ingo Molnar
* Frank Ch. Eigler f...@redhat.com wrote: Hi - On Sat, Mar 21, 2009 at 04:45:01PM +0100, Ingo Molnar wrote: [...] To me personally there are two big direct usability issues with SystemTap: 1) It relies on DEBUG_INFO for any reasonable level of utility. Yes, it will limp

Re: [PATCH 3/3] utrace-based ftrace process engine, v2

2009-03-22 Thread Ingo Molnar
* Linus Torvalds torva...@linux-foundation.org wrote: On Sat, 21 Mar 2009, Frank Ch. Eigler wrote: If testing utrace against its main application requires installation of a complete enterprise distro from a distro [...] This has *never* been a requirement. You guys are getting

Re: [PATCH 3/3] utrace-based ftrace process engine, v2

2009-03-22 Thread Ingo Molnar
* Ingo Molnar mi...@elte.hu wrote: Total download size: 329 M That size of a _compressed_ debuginfo kernel package is obscene. We can fit 4 years of full Linux kernel Git history into that size - 60,000+ commits, full metadata and full 20 million lines of code flux included!

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2009-03-22 Thread mike gordon
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Re: [PATCH 3/3] utrace-based ftrace process engine, v2

2009-03-22 Thread Roland McGrath
Well I dunno. You guys are closer to this than I am, but I'd have thought that systemtap is the main game here, and most/all of the above is just fluff. That is certainly not true for me. It is true that I hear plenty from systemtap developers, users, and boosters wanting utrace to be

Re: [PATCH 3/3] utrace-based ftrace process engine, v2

2009-03-22 Thread Roland McGrath
kernel/utrace.c should probably be introduced as kernel/trace/utrace.c not kernel/utrace.c. It also overlaps pending work in the tracing tree and cooperation would be nice and desired. Of course I would like to cooperate with everyone. And of course it does not really matter much where a