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