From: Jean Tourrilhes <jt@labs.hpe.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH 1/1 v2] eal: Fix misleading error messages, errno can't be trusted.
Date: Wed, 21 Sep 2016 14:10:50 -0700 [thread overview]
Message-ID: <20160921211049.GA27472@labs.hpe.com> (raw)
lib/librte_eal/linuxapp/eal/eal.c | 14 +++++++++++---
lib/librte_eal/linuxapp/eal/eal_memory.c | 16 ++++++++++++----
2 files changed, 23 insertions(+), 7 deletions(-)
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index 3fb2188..5df9f6a 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -238,7 +238,8 @@ 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 +264,16 @@ 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;
}
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 41e0a92..b036ffc 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1615,10 +1615,18 @@ 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));
+ 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);
+ 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 "
next reply other threads:[~2016-09-21 21:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-21 21:10 Jean Tourrilhes [this message]
2016-10-03 13:25 ` Sergio Gonzalez Monroy
2016-10-03 15:55 ` Jean Tourrilhes
2016-10-03 16:15 ` Mcnamara, John
2016-10-03 16:34 ` Jean Tourrilhes
2016-10-03 20:46 ` Thomas Monjalon
2016-10-04 8:03 ` Sergio Gonzalez Monroy
2016-10-04 9:31 ` Thomas Monjalon
2016-10-04 17:17 ` [dpdk-dev] [PATCH v2 1/3] mem: fix hugepage mapping error messages Jean Tourrilhes
2016-10-04 19:07 ` Sergio Gonzalez Monroy
2016-10-05 9:51 ` Thomas Monjalon
2016-10-05 16:41 ` Jean Tourrilhes
2016-10-03 16:07 ` [dpdk-dev] [PATCH 1/1 v2] eal: Fix misleading error messages, errno can't be trusted Jean Tourrilhes
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