linux-kernel - [tip:perf/urgent] Revert "perf tools: Emit clearer message for sys_perf_event

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Message-ID: <tip-4ad9f594d7199c99f6b1b3ef88c64bd5920a4592@git.kernel.org>
Date:	Wed, 12 Jan 2011 10:52:37 GMT
From:	tip-bot for Arnaldo Carvalho de Melo <acme@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, eranian@...gle.com, paulus@...ba.org,
	acme@...hat.com, hpa@...or.com, mingo@...hat.com,
	tzanussi@...il.com, peterz@...radead.org, efault@....de,
	fweisbec@...il.com, tglx@...utronix.de, daahern@...co.com,
	mingo@...e.hu
Subject: [tip:perf/urgent] Revert "perf tools: Emit clearer message for sys_perf_event_open ENOENT return"

Commit-ID:  4ad9f594d7199c99f6b1b3ef88c64bd5920a4592
Gitweb:     http://git.kernel.org/tip/4ad9f594d7199c99f6b1b3ef88c64bd5920a4592
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Tue, 11 Jan 2011 16:58:54 -0200
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 11 Jan 2011 17:31:26 -0200

Revert "perf tools: Emit clearer message for sys_perf_event_open ENOENT return"

This reverts commit aa7bc7ef73efc46d7c3a0e185eefaf85744aec98.

It removed the fallback from hardware profiling to software profiling.
.e.g., in a VM with no PMU.

Reported-by: David Ahern <daahern@...co.com>
Cc: David Ahern <daahern@...co.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Tom Zanussi <tzanussi@...il.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-record.c |    3 ---
 tools/perf/builtin-top.c    |    2 --
 2 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index aa7ece3..1210e64 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -331,9 +331,6 @@ try_again:
 			else if (err ==  ENODEV && cpu_list) {
 				die("No such device - did you specify"
 					" an out-of-range profile CPU?\n");
-			} else if (err == ENOENT) {
-				die("%s event is not supported. ",
-				     event_name(evsel));
 			} else if (err == EINVAL && sample_id_all_avail) {
 				/*
 				 * Old kernel, no attr->sample_id_type_all field
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 568b195..05344c6 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1247,8 +1247,6 @@ try_again:
 				die("Permission error - are you root?\n"
 					"\t Consider tweaking"
 					" /proc/sys/kernel/perf_event_paranoid.\n");
-			if (err == ENOENT)
-				die("%s event is not supported. ", event_name(evsel));
 			/*
 			 * If it's cycles then fall back to hrtimer
 			 * based cpu-clock-tick sw counter, which
--
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