mem: fix hugepage mapping error messages

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

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index b0049e2..bb7a5a7 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1333,13 +1333,21 @@ rte_eal_hugepage_attach(void)
                                 PROT_READ, MAP_PRIVATE, fd_zero, 0);
                if (base_addr == MAP_FAILED ||
                    base_addr != mcfg->memseg[s].addr) {
-                       RTE_LOG(ERR, EAL, "Could not mmap %llu bytes "
-                               "in /dev/zero to requested address [%p]: '%s'\n",
-                               (unsigned long long)mcfg->memseg[s].len,
-                               mcfg->memseg[s].addr, strerror(errno));
                        max_seg = s;
-                       if (base_addr != MAP_FAILED)
+                       if (base_addr != MAP_FAILED) {
+                               /* errno is stale, don't use */
+                               RTE_LOG(ERR, EAL, "Could not mmap %llu bytes "
+                                       "in /dev/zero at [%p], got [%p] - "
+                                       "please use '--base-virtaddr' option\n",
+                                       (unsigned long long)mcfg->memseg[s].len,
+                                       mcfg->memseg[s].addr, base_addr);
                                munmap(base_addr, mcfg->memseg[s].len);
+                       } else {
+                               RTE_LOG(ERR, EAL, "Could not mmap %llu bytes "
+                                       "in /dev/zero at [%p]: '%s'\n",
+                                       (unsigned long long)mcfg->memseg[s].len,
+                                       mcfg->memseg[s].addr, strerror(errno));
+                       }
                        if (aslr_enabled() > 0) {
                                RTE_LOG(ERR, EAL, "It is recommended to "
                                        "disable ASLR in the kernel "