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Message-ID: <tip-92485487ba834f6665ec13dfb2c69e80cd0c7c37@git.kernel.org>
Date: Mon, 5 Feb 2018 13:27:44 -0800
From: tip-bot for Mathieu Desnoyers <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: tglx@...utronix.de, paul.elder@...t.edu, avi@...lladb.com,
linux@...linux.org.uk, stern@...land.harvard.edu,
shuahkh@....samsung.com, linux-kernel@...r.kernel.org,
mpe@...erman.id.au, torvalds@...ux-foundation.org, luto@...nel.org,
parri.andrea@...il.com, mingo@...nel.org, alice.ferrazzi@...il.com,
sehr@...gle.com, paulmck@...ux.vnet.ibm.com, paulus@...ba.org,
maged.michael@...il.com, boqun.feng@...il.com,
mathieu.desnoyers@...icios.com, gregkh@...uxfoundation.org,
benh@...nel.crashing.org, ahh@...gle.com, hpa@...or.com,
ghackmann@...gle.com, peterz@...radead.org, will.deacon@....com,
davejwatson@...com
Subject: [tip:sched/urgent] membarrier/selftest: Test global expedited
command
Commit-ID: 92485487ba834f6665ec13dfb2c69e80cd0c7c37
Gitweb: https://git.kernel.org/tip/92485487ba834f6665ec13dfb2c69e80cd0c7c37
Author: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
AuthorDate: Mon, 29 Jan 2018 15:20:14 -0500
Committer: Ingo Molnar <mingo@...nel.org>
CommitDate: Mon, 5 Feb 2018 21:34:40 +0100
membarrier/selftest: Test global expedited command
Test the new MEMBARRIER_CMD_GLOBAL_EXPEDITED and
MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED commands.
Adapt to the MEMBARRIER_CMD_SHARED -> MEMBARRIER_CMD_GLOBAL rename.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Shuah Khan <shuahkh@....samsung.com>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Alan Stern <stern@...land.harvard.edu>
Cc: Alice Ferrazzi <alice.ferrazzi@...il.com>
Cc: Andrea Parri <parri.andrea@...il.com>
Cc: Andrew Hunter <ahh@...gle.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Avi Kivity <avi@...lladb.com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Boqun Feng <boqun.feng@...il.com>
Cc: Dave Watson <davejwatson@...com>
Cc: David Sehr <sehr@...gle.com>
Cc: Greg Hackmann <ghackmann@...gle.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Maged Michael <maged.michael@...il.com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Paul Elder <paul.elder@...t.edu>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Russell King <linux@...linux.org.uk>
Cc: Will Deacon <will.deacon@....com>
Cc: linux-api@...r.kernel.org
Cc: linux-arch@...r.kernel.org
Cc: linux-kselftest@...r.kernel.org
Link: http://lkml.kernel.org/r/20180129202020.8515-6-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
.../testing/selftests/membarrier/membarrier_test.c | 59 ++++++++++++++++++++--
1 file changed, 54 insertions(+), 5 deletions(-)
diff --git a/tools/testing/selftests/membarrier/membarrier_test.c b/tools/testing/selftests/membarrier/membarrier_test.c
index e6ee73d..eec39a0 100644
--- a/tools/testing/selftests/membarrier/membarrier_test.c
+++ b/tools/testing/selftests/membarrier/membarrier_test.c
@@ -59,10 +59,10 @@ static int test_membarrier_flags_fail(void)
return 0;
}
-static int test_membarrier_shared_success(void)
+static int test_membarrier_global_success(void)
{
- int cmd = MEMBARRIER_CMD_SHARED, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_SHARED";
+ int cmd = MEMBARRIER_CMD_GLOBAL, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_GLOBAL";
if (sys_membarrier(cmd, flags) != 0) {
ksft_exit_fail_msg(
@@ -132,6 +132,40 @@ static int test_membarrier_private_expedited_success(void)
return 0;
}
+static int test_membarrier_register_global_expedited_success(void)
+{
+ int cmd = MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED";
+
+ if (sys_membarrier(cmd, flags) != 0) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d\n",
+ test_name, flags);
+ return 0;
+}
+
+static int test_membarrier_global_expedited_success(void)
+{
+ int cmd = MEMBARRIER_CMD_GLOBAL_EXPEDITED, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_GLOBAL_EXPEDITED";
+
+ if (sys_membarrier(cmd, flags) != 0) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d\n",
+ test_name, flags);
+ return 0;
+}
+
static int test_membarrier(void)
{
int status;
@@ -142,7 +176,7 @@ static int test_membarrier(void)
status = test_membarrier_flags_fail();
if (status)
return status;
- status = test_membarrier_shared_success();
+ status = test_membarrier_global_success();
if (status)
return status;
status = test_membarrier_private_expedited_fail();
@@ -154,6 +188,19 @@ static int test_membarrier(void)
status = test_membarrier_private_expedited_success();
if (status)
return status;
+ /*
+ * It is valid to send a global membarrier from a non-registered
+ * process.
+ */
+ status = test_membarrier_global_expedited_success();
+ if (status)
+ return status;
+ status = test_membarrier_register_global_expedited_success();
+ if (status)
+ return status;
+ status = test_membarrier_global_expedited_success();
+ if (status)
+ return status;
return 0;
}
@@ -173,8 +220,10 @@ static int test_membarrier_query(void)
}
ksft_exit_fail_msg("sys_membarrier() failed\n");
}
- if (!(ret & MEMBARRIER_CMD_SHARED))
+ if (!(ret & MEMBARRIER_CMD_GLOBAL)) {
+ ksft_test_result_fail("sys_membarrier() CMD_GLOBAL query failed\n");
ksft_exit_fail_msg("sys_membarrier is not supported.\n");
+ }
ksft_test_result_pass("sys_membarrier available\n");
return 0;
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