Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracepoint for x86 & x86_64

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From: Christoph Hellwig

Subject: Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracepoint for x86 & x86_64

Date: Thursday, November 11, 2010 - 5:51 am

Can you explain again who this is supposed to be used?  It's missing
a lot of essential information about the page fault, but on the other
hand traces totally useless information like the task struct pointer.

What's your motivation for posting this given that you obviously
haven't actually tried to use it in practice?

Btw, this doesn't mean I'm against a page faul trace point - quite
contrary.  It just seems you're not actually pushing something that's
been tested in real life or is generally useful.

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Messages in current thread:

[PATCH 0/2] tracing,mm - add kernel pagefault tracepoint f ..., Jiri Olsa, (Wed Nov 10, 4:56 am)

[PATCH 1/2] tracing,mm - add kernel pagefault tracepoint f ..., Jiri Olsa, (Wed Nov 10, 4:56 am)

Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoi ..., Christoph Hellwig, (Wed Nov 10, 6:29 am)

Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoi ..., Jiri Olsa, (Wed Nov 10, 6:44 am)

Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoi ..., Ingo Molnar, (Wed Nov 10, 6:52 am)

Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoi ..., Frederic Weisbecker, (Wed Nov 10, 8:00 am)

Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoi ..., Jiri Olsa, (Wed Nov 10, 8:17 am)

Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoi ..., Christoph Hellwig, (Wed Nov 10, 8:20 am)

Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoi ..., Andi Kleen, (Wed Nov 10, 9:28 am)

Re: [PATCH 1/2] tracing,mm - add kernel pagefault tracepoi ..., Frederic Weisbecker, (Wed Nov 10, 9:44 am)

[PATCHv2 0/2] tracing,mm - add kernel pagefault tracepoint ..., Jiri Olsa, (Thu Nov 11, 2:09 am)

[PATCHv2 1/2] tracing - fix recursive user stack trace, Jiri Olsa, (Thu Nov 11, 2:09 am)

[PATCHv2 2/2] tracing,mm - add kernel pagefault tracepoint ..., Jiri Olsa, (Thu Nov 11, 2:09 am)

Re: [PATCHv2 1/2] tracing - fix recursive user stack trace, Andi Kleen, (Thu Nov 11, 3:34 am)

Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracep ..., Christoph Hellwig, (Thu Nov 11, 5:51 am)

Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracep ..., Jiri Olsa, (Thu Nov 11, 6:15 am)

Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracep ..., Frederic Weisbecker, (Mon Nov 15, 6:43 am)

Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracep ..., Andi Kleen, (Mon Nov 15, 7:06 am)

Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracep ..., Steven Rostedt, (Mon Nov 15, 7:19 am)

Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracep ..., Frederic Weisbecker, (Mon Nov 15, 7:54 am)

Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracep ..., Steven Rostedt, (Mon Nov 15, 8:04 am)

Re: [PATCHv2 2/2] tracing,mm - add kernel pagefault tracep ..., Jiri Olsa