[libvirt] [PATCH] nodeinfo: Don't fail on non-contiguous NUMA topologies

[Peter Krempa]

From: hejia hejia <jiakernel at gmail.com>

nodeGetFreeMemory and nodeGetCellsFreeMemory assumed that the NUMA nodes
are contiguous and starting from 0. Unfortunately there are machines
that don't match this assumption:

available: 1 nodes (1)
node 1 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
node 1 size: 16340 MB
node 1 free: 11065 MB

Before this patch:
error: internal error Failed to query NUMA free memory
error: internal error Failed to query NUMA free memory for node: 0

After this patch:
Total: 15772580 KiB
0: 0 KiB

Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
 src/nodeinfo.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/src/nodeinfo.c b/src/nodeinfo.c
index a2a2f73..4df4851 100644
--- a/src/nodeinfo.c
+++ b/src/nodeinfo.c
@@ -1686,12 +1686,9 @@ nodeGetCellsFreeMemory(unsigned long long *freeMems,

     for (numCells = 0, n = startCell; n <= lastCell; n++) {
         long long mem;
-        if (numa_node_size64(n, &mem) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR,
-                           _("Failed to query NUMA free memory for node: %d"),
-                           n);
-            goto cleanup;
-        }
+        if (numa_node_size64(n, &mem) < 0)
+            mem = 0;
+
         freeMems[numCells++] = mem;
     }
     ret = numCells;
@@ -1712,15 +1709,12 @@ nodeGetFreeMemory(void)

     for (n = 0; n <= numa_max_node(); n++) {
         long long mem;
-        if (numa_node_size64(n, &mem) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR,
-                           "%s", _("Failed to query NUMA free memory"));
-            goto cleanup;
-        }
+        if (numa_node_size64(n, &mem) < 0)
+            continue;
+
         freeMem += mem;
     }

-cleanup:
     return freeMem;
 }

-- 
1.8.3.2