On Sat, Jan 25, 2025 at 7:25 AM Saket Kumar Bhaskar skb99@linux.ibm.com wrote:
On powerpc, a CPU does not necessarily originate from NUMA node 0. This contrasts with architectures like x86, where CPU 0 is not hot-pluggable, making NUMA node 0 a consistently valid node. This discrepancy can lead to failures when creating a map on NUMA node 0, which is initialized by default, if no CPUs are allocated from NUMA node 0.
This patch fixes the issue by setting NUMA node for map creation to NUMA node of the current CPU.
Fixes: 96eabe7a40aa ("bpf: Allow selecting numa node during map creation") Signed-off-by: Saket Kumar Bhaskar skb99@linux.ibm.com
tools/testing/selftests/bpf/Makefile | 2 +- tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 0a016cd71..c7a996f53 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -47,7 +47,7 @@ CFLAGS += -g $(OPT_FLAGS) -rdynamic \ -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) \ -I$(TOOLSINCDIR) -I$(TOOLSARCHINCDIR) -I$(APIDIR) -I$(OUTPUT) LDFLAGS += $(SAN_LDFLAGS) -LDLIBS += $(LIBELF_LIBS) -lz -lrt -lpthread +LDLIBS += $(LIBELF_LIBS) -lz -lrt -lpthread -lnuma
PCAP_CFLAGS := $(shell $(PKG_CONFIG) --cflags libpcap 2>/dev/null && echo "-DTRAFFIC_MONITOR=1") PCAP_LIBS := $(shell $(PKG_CONFIG) --libs libpcap 2>/dev/null) diff --git a/tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c b/tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c index cc184e442..d241d22b8 100644 --- a/tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c +++ b/tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c @@ -4,6 +4,7 @@ #include <sys/syscall.h> #include <limits.h> #include <test_progs.h> +#include <numa.h> #include "bloom_filter_map.skel.h"
static void test_fail_cases(void) @@ -69,6 +70,7 @@ static void test_success_cases(void)
/* Create a map */ opts.map_flags = BPF_F_ZERO_SEED | BPF_F_NUMA_NODE;
opts.numa_node = numa_node_of_cpu(sched_getcpu()); // Get the NUMA node of the current CPU
let's not introduce new library deps. Will NUMA_NO_NODE work ?
Note c++ comments are not allowed.
pw-bot: cr