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From 77e4fe56bc4fdebb629e5250c113aa1750b0d0a2 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Michal=20Sekleta=CC=81r?= <msekleta@redhat.com>
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Date: Tue, 14 Apr 2020 16:16:45 +0200
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Subject: [PATCH] basic: use comma as separator in cpuset cgroup cpu ranges
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This is a workaround for
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https://bugzilla.redhat.com/show_bug.cgi?id=1819152 and should be
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reverted in RHEL-8.3.
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RHEL-only
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Related: #1824129
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---
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src/basic/cpu-set-util.c | 45 ++++++++++++++++++++++++++++++++++++++++
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src/basic/cpu-set-util.h | 1 +
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src/core/cgroup.c | 2 +-
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3 files changed, 47 insertions(+), 1 deletion(-)
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diff --git a/src/basic/cpu-set-util.c b/src/basic/cpu-set-util.c
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index 36cb017ae7..51752ad1a6 100644
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--- a/src/basic/cpu-set-util.c
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+++ b/src/basic/cpu-set-util.c
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@@ -86,6 +86,51 @@ char *cpu_set_to_range_string(const CPUSet *set) {
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return TAKE_PTR(str) ?: strdup("");
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}
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+/* XXX(msekleta): this is the workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1819152, remove in 8.3 */
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+char *cpu_set_to_range_string_kernel(const CPUSet *set) {
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+ unsigned range_start = 0, range_end;
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+ _cleanup_free_ char *str = NULL;
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+ size_t allocated = 0, len = 0;
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+ bool in_range = false;
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+ int r;
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+
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+ for (unsigned i = 0; i < set->allocated * 8; i++)
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+ if (CPU_ISSET_S(i, set->allocated, set->set)) {
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+ if (in_range)
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+ range_end++;
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+ else {
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+ range_start = range_end = i;
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+ in_range = true;
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+ }
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+ } else if (in_range) {
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+ in_range = false;
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+
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+ if (!GREEDY_REALLOC(str, allocated, len + 2 + 2 * DECIMAL_STR_MAX(unsigned)))
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+ return NULL;
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+
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+ if (range_end > range_start)
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+ r = sprintf(str + len, len > 0 ? ",%d-%d" : "%d-%d", range_start, range_end);
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+ else
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+ r = sprintf(str + len, len > 0 ? ",%d" : "%d", range_start);
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+ assert_se(r > 0);
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+ len += r;
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+ }
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+
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+ if (in_range) {
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+ if (!GREEDY_REALLOC(str, allocated, len + 2 + 2 * DECIMAL_STR_MAX(int)))
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+ return NULL;
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+
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+ if (range_end > range_start)
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+ r = sprintf(str + len, len > 0 ? ",%d-%d" : "%d-%d", range_start, range_end);
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+ else
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+ r = sprintf(str + len, len > 0 ? ",%d" : "%d", range_start);
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+ assert_se(r > 0);
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+ }
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+
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+ return TAKE_PTR(str) ?: strdup("");
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+}
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+
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+
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int cpu_set_realloc(CPUSet *cpu_set, unsigned ncpus) {
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size_t need;
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diff --git a/src/basic/cpu-set-util.h b/src/basic/cpu-set-util.h
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index 295028cb54..8519a9b6c8 100644
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--- a/src/basic/cpu-set-util.h
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+++ b/src/basic/cpu-set-util.h
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@@ -27,6 +27,7 @@ int cpu_set_add_all(CPUSet *a, const CPUSet *b);
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char* cpu_set_to_string(const CPUSet *a);
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char *cpu_set_to_range_string(const CPUSet *a);
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+char *cpu_set_to_range_string_kernel(const CPUSet *a);
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int cpu_set_realloc(CPUSet *cpu_set, unsigned ncpus);
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int parse_cpu_set_full(
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diff --git a/src/core/cgroup.c b/src/core/cgroup.c
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index 3f7665b755..9e4c3c7dac 100644
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--- a/src/core/cgroup.c
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+++ b/src/core/cgroup.c
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@@ -557,7 +557,7 @@ static void cgroup_apply_unified_cpuset(Unit *u, CPUSet cpus, const char *name)
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_cleanup_free_ char *buf = NULL;
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int r;
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- buf = cpu_set_to_range_string(&cpus);
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+ buf = cpu_set_to_range_string_kernel(&cpus);
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if (!buf)
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return;
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