numa_helper relied on functions that do not exist in old libnuma (<1), which caused that it couldn't be compiled on old distros, for example RHEL 5.3.
Old libnuma and kernel also do not support MPOL_F_MEMS_ALLOWED, in which case it will assume that any node with memory > 0 can be used. This patch adds compatibility for older versions, I tested it with: numactl-0.9.8-7.el5 numactl-2.0.3-9.el6 numactl-2.0.7-6.el7 Signed-off-by: Jan Stancek <[email protected]> --- testcases/kernel/syscalls/numa/lib/Makefile | 2 +- testcases/kernel/syscalls/numa/lib/numa_helper.c | 52 +++++++++++++++++----- 2 files changed, 41 insertions(+), 13 deletions(-) diff --git a/testcases/kernel/syscalls/numa/lib/Makefile b/testcases/kernel/syscalls/numa/lib/Makefile index d4a6f41..ba2fb48 100644 --- a/testcases/kernel/syscalls/numa/lib/Makefile +++ b/testcases/kernel/syscalls/numa/lib/Makefile @@ -20,7 +20,7 @@ top_srcdir ?= ../../../../.. include $(top_srcdir)/include/mk/env_pre.mk -CPPFLAGS += -I../../../include +CPPFLAGS += -I../../../include $(NUMA_CPPFLAGS) LIB := libnuma_helper.a include $(top_srcdir)/include/mk/lib.mk diff --git a/testcases/kernel/syscalls/numa/lib/numa_helper.c b/testcases/kernel/syscalls/numa/lib/numa_helper.c index 855ee2c..20b06ca 100644 --- a/testcases/kernel/syscalls/numa/lib/numa_helper.c +++ b/testcases/kernel/syscalls/numa/lib/numa_helper.c @@ -53,46 +53,74 @@ int get_allowed_nodes_arr(int *num_allowed_nodes, int **allowed_nodes) { #if HAVE_NUMA_H int i; - struct bitmask *allowed_nodemask = NULL; + nodemask_t *allowed_nodemask = NULL; + unsigned long max_node; + +#if !defined(LIBNUMA_API_VERSION) || LIBNUMA_API_VERSION < 2 + max_node = NUMA_NUM_NODES; + /* + * NUMA_NUM_NODES is not reliable, libnuma >=2 is looking + * at /proc/self/status to figure out correct number. + * If buffer is not large enough get_mempolicy will fail with EINVAL. + */ + if (max_node < 1024) + max_node = 1024; +#else + max_node = numa_max_possible_node() + 1; #endif +#endif /* HAVE_NUMA_H */ + *num_allowed_nodes = 0; if (allowed_nodes) *allowed_nodes = NULL; -#if HAVE_NUMA_H && HAVE_MPOL_CONSTANTS - if ((allowed_nodemask = numa_allocate_nodemask()) == NULL) +#if HAVE_NUMA_H + if ((allowed_nodemask = malloc(max_node/8+1)) == NULL) return -1; + nodemask_zero(allowed_nodemask); if (allowed_nodes) { - *allowed_nodes = malloc(sizeof(int)*allowed_nodemask->size); - if (*allowed_nodes == NULL) + *allowed_nodes = malloc(sizeof(int)*max_node); + if (*allowed_nodes == NULL) { + free(allowed_nodemask); return -1; + } } +#if MPOL_F_MEMS_ALLOWED /* * avoid numa_get_mems_allowed(), because of bug in getpol() * utility function in older versions: * http://www.spinics.net/lists/linux-numa/msg00849.html */ - if (syscall(__NR_get_mempolicy, NULL, allowed_nodemask->maskp, - allowed_nodemask->size, 0, MPOL_F_MEMS_ALLOWED) < 0) { - numa_bitmask_free(allowed_nodemask); + if (syscall(__NR_get_mempolicy, NULL, allowed_nodemask->n, + max_node, 0, MPOL_F_MEMS_ALLOWED) < 0) { + free(allowed_nodemask); if (allowed_nodes) { free(*allowed_nodes); *allowed_nodes = NULL; } return -2; } +#else + /* + * old libnuma/kernel don't have MPOL_F_MEMS_ALLOWED, so let's assume + * that we can use any node with memory > 0 + */ + for (i = 0; i < max_node; i++) + if (numa_node_size64(i, NULL) > 0) + nodemask_set(allowed_nodemask, i); - for (i = 0; i < allowed_nodemask->size; i++) { - if (numa_bitmask_isbitset(allowed_nodemask, i)) { +#endif /* MPOL_F_MEMS_ALLOWED */ + for (i = 0; i < max_node; i++) { + if (nodemask_isset(allowed_nodemask, i)) { if (allowed_nodes) (*allowed_nodes)[*num_allowed_nodes] = i; (*num_allowed_nodes)++; } } - numa_bitmask_free(allowed_nodemask); -#endif + free(allowed_nodemask); +#endif /* HAVE_NUMA_H */ return 0; } -- 1.7.1 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Ltp-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ltp-list
