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

2009-03-23 Thread Ingo Molnar
* Roland McGrath rol...@redhat.com wrote: 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

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

2009-03-23 Thread Frank Ch. Eigler
Denys Vlasenko dvlas...@redhat.com writes: [...] Here's the /debugfs/tracing/process_trace_README: process event tracer mini-HOWTO [...] A HOWTO text in the kernel binary? Shouldn't it be in Documentation/* instead? [...] It parallels the debugfs/tracing/README file. - FChE

Re: [RFC][PATCH 1/2] tracing/ftrace: syscall tracing infrastructure

2009-03-23 Thread Mathieu Desnoyers
* Frank Ch. Eigler (f...@redhat.com) wrote: Hi - On Mon, Mar 16, 2009 at 05:45:26PM -0400, Mathieu Desnoyers wrote: [...] As far as I know, utrace supports multiple trace-engines on a process. Since ptrace is just an engine of utrace, you can add another engine on utrace.

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

2009-03-23 Thread Frank Ch. Eigler
Hi - On Sun, Mar 22, 2009 at 01:08:11PM +0100, Ingo Molnar wrote: [...] In my own limited kernel-building experience, I find the debuginfo data conveniently and instantly available after every make. Can you elaborate how is it harder for you to incidentally make it than for someone

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

2009-03-23 Thread Theodore Tso
On Mon, Mar 23, 2009 at 04:14:00PM +0100, Oleg Nesterov wrote: Yes, ptrace-over-utrace needs more work. But your message looks as if utrace core is buggy, imho this is a bit unfair ;) As Roland said, ptrace-over-utrace is not ready yet. If you mean that utrace core should not be merged

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

2009-03-23 Thread Ananth N Mavinakayanahalli
On Sat, Mar 21, 2009 at 05:04:22AM -0700, Andrew Morton wrote: On Sat, 21 Mar 2009 07:51:41 -0400 Frank Ch. Eigler f...@redhat.com wrote: On Sat, Mar 21, 2009 at 04:19:54AM -0700, Andrew Morton wrote: I have strong memories of being traumatised by reading the uprobes code. That was a long