From: Peter Zijlstra <peterz@infradead.org>
To: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: David Ahern <dsahern@gmail.com>, Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org,
Robert Richter <robert.richter@amd.com>
Subject: Re: [PATCH 3/3 v2] perf tool: give user better message if precise is not supported
Date: Fri, 14 Sep 2012 20:07:19 +0200 [thread overview]
Message-ID: <1347646039.7172.66.camel@twins> (raw)
In-Reply-To: <20120914180013.GA27766@ghostprotocols.net>
On Fri, 2012-09-14 at 11:00 -0700, Arnaldo Carvalho de Melo wrote:
> > Understood and there have been suggestions on how to definitely state
> > what the kernel side did not like. I like Peter's last suggestion --
> > something along the lines of clearing attr on a failure except the
> > offending setting.
>
> I think ws need to use a new bit
Quite so, for all the reasons you list. But you like the general idea? I
wasn't sure I did, but it was the only thing I could come up with that
would sort of do what we need it to.
The fact that you destroy the user input is awkward, I don't think
there's another syscall that behaves in this fashion.
next prev parent reply other threads:[~2012-09-14 18:07 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-13 20:59 [PATCH 0/3 v3] perf: precise mode and exclude_guest David Ahern
2012-09-13 20:59 ` [PATCH 1/3] perf tool: precise mode requires exclude_guest David Ahern
2012-10-20 0:55 ` [tip:perf/urgent] perf tool: Precise " tip-bot for David Ahern
2012-09-13 20:59 ` [PATCH 2/3] perf: require exclude_guest to use PEBS - kernel side enforcement David Ahern
2012-10-20 0:56 ` [tip:perf/urgent] perf: Require " tip-bot for Peter Zijlstra
2012-09-13 20:59 ` [PATCH 3/3 v2] perf tool: give user better message if precise is not supported David Ahern
2012-09-14 5:43 ` Ingo Molnar
2012-09-14 11:13 ` David Ahern
2012-09-14 11:36 ` Ingo Molnar
2012-09-14 11:43 ` David Ahern
2012-09-14 18:00 ` Arnaldo Carvalho de Melo
2012-09-14 18:07 ` Peter Zijlstra [this message]
2012-09-14 20:05 ` Ingo Molnar
2012-09-14 20:11 ` Ingo Molnar
2012-09-14 21:26 ` Peter Zijlstra
2012-09-17 7:11 ` Ingo Molnar
2012-10-25 8:01 ` [tip:perf/core] perf tools: Give " tip-bot for David Ahern
2012-09-26 1:24 ` [PATCH 0/3 v3] perf: precise mode and exclude_guest David Ahern
2012-10-09 15:08 ` David Ahern
-- strict thread matches above, loose matches on Subject: below --
2012-09-12 15:16 [PATCH 0/3 v2] " David Ahern
2012-09-12 15:16 ` [PATCH 3/3 v2] perf tool: give user better message if precise is not supported David Ahern
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