linux-kernel - [tip:perf/core] perf record: Don' t pass host machine to guest synthesizer

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Date:	Fri, 25 Jan 2013 03:07:17 -0800
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@...nel.org,
	peterz@...radead.org, efault@....de, namhyung@...il.com,
	jolsa@...hat.com, fweisbec@...il.com, dsahern@...il.com,
	tglx@...utronix.de
Subject: [tip:perf/core] perf record: Don'
 t pass host machine to guest synthesizer

Commit-ID:  7e383de42565ecb2cf641fff11946f9bc45e8235
Gitweb:     http://git.kernel.org/tip/7e383de42565ecb2cf641fff11946f9bc45e8235
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Tue, 18 Dec 2012 15:49:27 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 24 Jan 2013 16:40:11 -0300

perf record: Don't pass host machine to guest synthesizer

We were calling perf_session__process_machines(), that would first pass
the struct machine associated with the host to the provided callback,
perf_event__synthesize_guest_os() that would test if it was the host and
if so wouldn't do anything.

Ditch this contraption, just call directly machines__process with the
list of guests.

Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Mike Galbraith <efault@....de>
Cc: Namhyung Kim <namhyung@...il.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-x65vsxgzg4dvo3zqohtrrb9o@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-record.c | 11 ++++-------
 tools/perf/util/session.h   |  9 ---------
 2 files changed, 4 insertions(+), 16 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index de60dd4..69e2895 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -328,10 +328,6 @@ static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
 {
 	int err;
 	struct perf_tool *tool = data;
-
-	if (machine__is_host(machine))
-		return;
-
 	/*
 	 *As for guest kernel when processing subcommand record&report,
 	 *we arrange module mmap prior to guest kernel mmap and trigger
@@ -574,9 +570,10 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
 		       "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
 		       "Check /proc/modules permission or run as root.\n");
 
-	if (perf_guest)
-		perf_session__process_machines(session, tool,
-					       perf_event__synthesize_guest_os);
+	if (perf_guest) {
+		machines__process(&session->machines,
+				  perf_event__synthesize_guest_os, tool);
+	}
 
 	if (!opts->target.system_wide)
 		err = perf_event__synthesize_thread_map(tool, evsel_list->threads,
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 8c23025..426ca0c 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -101,15 +101,6 @@ struct machine *perf_session__findnew_machine(struct perf_session *self, pid_t p
 	return machines__findnew(&self->machines, pid);
 }
 
-static inline
-void perf_session__process_machines(struct perf_session *self,
-				    struct perf_tool *tool,
-				    machine__process_t process)
-{
-	process(&self->host_machine, tool);
-	return machines__process(&self->machines, process, tool);
-}
-
 struct thread *perf_session__findnew(struct perf_session *self, pid_t pid);
 size_t perf_session__fprintf(struct perf_session *self, FILE *fp);
 
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