[dpdk-dev] [PATCH v4] eal: Set numa node value for system which not support it.

[Tonghao Zhang]

The NUMA node information for PCI devices provided through
sysfs is invalid for AMD Opteron(TM) Processor 62xx and 63xx
on Red Hat Enterprise Linux 6, and VMs on some hypervisors.
It is good to see more checking for valid values.

Signed-off-by: Tonghao Zhang <nic at opencloud.tech>
---
 lib/librte_eal/linuxapp/eal/eal_pci.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
index 595622b..c817b4c 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -310,18 +310,18 @@
 			dev->max_vfs = (uint16_t)tmp;
 	}
 
-	/* get numa node */
+	/* get numa node, default to 0 if not present */
 	snprintf(filename, sizeof(filename), "%s/numa_node",
 		 dirname);
-	if (access(filename, R_OK) != 0) {
-		/* if no NUMA support, set default to 0 */
-		dev->device.numa_node = 0;
-	} else {
-		if (eal_parse_sysfs_value(filename, &tmp) < 0) {
-			free(dev);
-			return -1;
-		}
+
+	if (eal_parse_sysfs_value(filename, &tmp) == 0 &&
+		tmp < RTE_MAX_NUMA_NODES)
 		dev->device.numa_node = tmp;
+	else {
+		RTE_LOG(WARNING, EAL,
+			"numa_node is invalid or not present. "
+			"Set it 0 as default\n");
+		dev->device.numa_node = 0;
 	}
 
 	rte_pci_device_name(addr, dev->name, sizeof(dev->name));
-- 
1.8.3.1