mem: fix hugepage mapping error messages

[dpdk.git] / lib / librte_eal / linuxapp / eal / eal.c

diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index d5b81a3..81264a2 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -70,6 +70,7 @@
 #include <rte_cpuflags.h>
 #include <rte_interrupts.h>
 #include <rte_pci.h>
+#include <rte_dev.h>
 #include <rte_devargs.h>
 #include <rte_common.h>
 #include <rte_version.h>
@@ -238,7 +239,8 @@ rte_eal_config_attach(void)
        mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
                        PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
        if (mem_config == MAP_FAILED)
-               rte_panic("Cannot mmap memory for rte_config\n");
+               rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
+                         errno, strerror(errno));
 
        rte_config.mem_config = mem_config;
 }
@@ -263,9 +265,17 @@ rte_eal_config_reattach(void)
        mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
                        sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
                        mem_cfg_fd, 0);
+       if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
+               if (mem_config != MAP_FAILED)
+                       /* errno is stale, don't use */
+                       rte_panic("Cannot mmap memory for rte_config at [%p], got [%p]"
+                                 " - please use '--base-virtaddr' option\n",
+                                 rte_mem_cfg_addr, mem_config);
+               else
+                       rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
+                                 errno, strerror(errno));
+       }
        close(mem_cfg_fd);
-       if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr)
-               rte_panic("Cannot mmap memory for rte_config\n");
 
        rte_config.mem_config = mem_config;
 }
@@ -740,6 +750,9 @@ rte_eal_init(int argc, char **argv)
        char cpuset[RTE_CPU_AFFINITY_STR_LEN];
        char thread_name[RTE_MAX_THREAD_NAME_LEN];
 
+       /* checks if the machine is adequate */
+       rte_cpu_check_supported();
+
        if (!rte_atomic32_test_and_set(&run_once))
                return -1;