linux-kernel - Re: [GIT PULL 0/5] perf/urgent fixes

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Message-ID: <20110529141256.GA12777@ghostprotocols.net>
Date:	Sun, 29 May 2011 11:12:56 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tom Zanussi <tzanussi@...il.com>
Subject: Re: [GIT PULL 0/5] perf/urgent fixes

Em Sat, May 28, 2011 at 11:41:50AM +0200, Ingo Molnar escreveu:
> The various variations of kptr_restrict now work fine AFAICS - will 
> send the fixes to Linus today.
> 
> One (very) small issue i noticed, if the user only samples user-space 
> events then i still get the warning:
> 
>  aldebaran:~> perf record -e cycles:upp sleep 1
>  WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,
> 
> although perf does not record any kernel samples so kptr_restrict is 
> irrelevant in this case.

I'll have that fixed too, oversight. We really should avoid confusing
messages, and this one, as you mention, seems just noise as I still have
to look again how vsyscall symbols get resolved, IIRC they need a kernel
symtab, but then, if that is the case, the message should be changed
accordingly.

- Arnaldo
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