linux-kernel - Re: [GIT PULL] tracing: make signal tracepoints more useful

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Message-ID: <1326829977.17534.65.camel@gandalf.stny.rr.com>
Date:	Tue, 17 Jan 2012 14:52:57 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Oleg Nesterov <oleg@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Seiji Aguchi <saguchi@...hat.com>,
	linux-kernel@...r.kernel.org,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Subject: Re: [GIT PULL] tracing: make signal tracepoints more useful

On Tue, 2012-01-17 at 11:02 +0100, Ingo Molnar wrote:
>  
> > The kernel does this all the time. We have syscalls that may 
> > extend the data structure. [...]
> 
> That is not true *AT ALL* in such an unqualified manner. Steve, 
> stop being stupid.

OK, Ingo I think we had a little miscommunication here.

I forgot what I originally wrote, and you cut off too much in your
reply. What I originally said:

"The kernel does this all the time. We have syscalls that may extend the
data structure. This is a common practice. Any app that depends on a
data structure remaining the same size for no good reason is broken by
design."

If you took the "Any app that depends on a data structure remaining the
same size for no good reason is broken by design" was suppose to mean,
any app that depends on syscall data structures is broken by design, I
would agree, that statement is stupid. I didn't write that well, as my
thought process switched back to reading tracepoints and wasn't meant to
be about syscalls there. I didn't articulate that properly.

As you can tell, I was a little upset at being called stupid this
morning. If you took that statement to mean about syscalls, I understand
your calling me stupid, and I apologize for being a bit snippy. I like
to keep LKML discussions technical and not something for name calling.

-- Steve

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