libhugetlbfs/SOURCES/0002-tests-slbpacaflush-Use-online-cpus-only.patch

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2020-01-21 19:55:32 +00:00
From 865d160eff7e6c69968d0196272030f206dd3430 Mon Sep 17 00:00:00 2001
Message-Id: <865d160eff7e6c69968d0196272030f206dd3430.1566225007.git.aquini@redhat.com>
In-Reply-To: <d42f467a923dfc09309acb7a83b42e3285fbd8f4.1566225007.git.aquini@redhat.com>
References: <d42f467a923dfc09309acb7a83b42e3285fbd8f4.1566225007.git.aquini@redhat.com>
From: Sandipan Das <sandipan@linux.ibm.com>
Date: Thu, 15 Aug 2019 13:08:29 +0530
Subject: [RHEL7 PATCH 02/31] tests: slbpacaflush: Use online cpus only
This ensures that the two cpus between which the thread is
migrated are online. For offline cpus, sched_setaffinity()
will always fail.
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Eric B Munson <emunson@mgebm.net>
Signed-off-by: Rafael Aquini <aquini@redhat.com>
---
tests/slbpacaflush.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/tests/slbpacaflush.c b/tests/slbpacaflush.c
index 8893c4d..765e069 100644
--- a/tests/slbpacaflush.c
+++ b/tests/slbpacaflush.c
@@ -57,29 +57,32 @@ int main(int argc, char *argv[])
int fd;
void *p;
volatile unsigned long *q;
- int err;
+ int online_cpus[2], err;
cpu_set_t cpu0, cpu1;
test_init(argc, argv);
hpage_size = check_hugepagesize();
+ check_online_cpus(online_cpus, 2);
fd = hugetlbfs_unlinked_fd();
if (fd < 0)
FAIL("hugetlbfs_unlinked_fd()");
CPU_ZERO(&cpu0);
- CPU_SET(0, &cpu0);
+ CPU_SET(online_cpus[0], &cpu0);
CPU_ZERO(&cpu1);
- CPU_SET(1, &cpu1);
+ CPU_SET(online_cpus[1], &cpu1);
err = sched_setaffinity(getpid(), CPU_SETSIZE/8, &cpu0);
if (err != 0)
- CONFIG("sched_setaffinity(cpu0): %s", strerror(errno));
+ CONFIG("sched_setaffinity(cpu%d): %s", online_cpus[0],
+ strerror(errno));
err = sched_setaffinity(getpid(), CPU_SETSIZE/8, &cpu1);
if (err != 0)
- CONFIG("sched_setaffinity(): %s", strerror(errno));
+ CONFIG("sched_setaffinity(cpu%d): %s", online_cpus[1],
+ strerror(errno));
p = mmap(NULL, hpage_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p == MAP_FAILED)
@@ -87,7 +90,8 @@ int main(int argc, char *argv[])
err = sched_setaffinity(getpid(), CPU_SETSIZE/8, &cpu0);
if (err != 0)
- CONFIG("sched_setaffinity(cpu0): %s", strerror(errno));
+ CONFIG("sched_setaffinity(cpu%d): %s", online_cpus[0],
+ strerror(errno));
q = (volatile unsigned long *)(p + getpagesize());
*q = 0xdeadbeef;
--
1.8.3.1