linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	Jiri Olsa <jolsa@kernel.org>, David Ahern <dsahern@gmail.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 4/9] perf tools: Open perf.data with O_CLOEXEC flag
Date: Tue, 12 Sep 2017 16:24:33 -0300	[thread overview]
Message-ID: <20170912192438.1334-5-acme@kernel.org> (raw)
In-Reply-To: <20170912192438.1334-1-acme@kernel.org>

From: Jiri Olsa <jolsa@kernel.org>

Do not carry the perf.data file descriptor into the workload process and
close it when perf executes the workload.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170908084621.31595-2-jolsa@kernel.org
[ Add definitions for O_CLOEXEC for older systems ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/data.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index e84bbc8ec058..263f5a906ba5 100644
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -10,6 +10,16 @@
 #include "util.h"
 #include "debug.h"
 
+#ifndef O_CLOEXEC
+#ifdef __sparc__
+#define O_CLOEXEC	0x400000
+#elif defined(__alpha__) || defined(__hppa__)
+#define O_CLOEXEC	010000000
+#else
+#define O_CLOEXEC	02000000
+#endif
+#endif
+
 static bool check_pipe(struct perf_data_file *file)
 {
 	struct stat st;
@@ -96,7 +106,8 @@ static int open_file_write(struct perf_data_file *file)
 	if (check_backup(file))
 		return -1;
 
-	fd = open(file->path, O_CREAT|O_RDWR|O_TRUNC, S_IRUSR|S_IWUSR);
+	fd = open(file->path, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC,
+		  S_IRUSR|S_IWUSR);
 
 	if (fd < 0)
 		pr_err("failed to open %s : %s\n", file->path,
-- 
2.13.5

  parent reply	other threads:[~2017-09-12 19:25 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-12 19:24 [GIT PULL 0/9] perf/urgent fixes Arnaldo Carvalho de Melo
2017-09-12 19:24 ` [PATCH 1/9] tools include linux: Guard against redefinition of some macros Arnaldo Carvalho de Melo
2017-09-12 19:24 ` [PATCH 2/9] perf tests: Fix compile when libunwind's unwind.h is available Arnaldo Carvalho de Melo
2017-09-12 19:24 ` [PATCH 3/9] tools lib api: Fix make DEBUG=1 build Arnaldo Carvalho de Melo
2017-09-12 19:24 ` Arnaldo Carvalho de Melo [this message]
2017-09-12 19:24 ` [PATCH 5/9] perf ui progress: Make sure we always define step value Arnaldo Carvalho de Melo
2017-09-12 19:24 ` [PATCH 6/9] perf ui progress: Fix progress update Arnaldo Carvalho de Melo
2017-09-12 19:24 ` [PATCH 7/9] perf config: Check not only section->from_system_config but also item's Arnaldo Carvalho de Melo
2017-09-12 19:24 ` [PATCH 8/9] perf tools: Support running perf binaries with a dash in their name Arnaldo Carvalho de Melo
2017-09-12 19:24 ` [PATCH 9/9] perf stat: Wait for the correct child Arnaldo Carvalho de Melo
2017-09-13  7:26 ` [GIT PULL 0/9] perf/urgent fixes Ingo Molnar
2017-09-13  7:38 ` [PATCH] tools/include: Sync kernel ABI headers with tooling headers Ingo Molnar
2017-09-29 20:04   ` [tip:perf/urgent] tools include: " tip-bot for Ingo Molnar

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170912192438.1334-5-acme@kernel.org \
    --to=acme@kernel.org \
    --cc=a.p.zijlstra@chello.nl \
    --cc=acme@redhat.com \
    --cc=dsahern@gmail.com \
    --cc=jolsa@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-perf-users@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=namhyung@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).