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Re: [libvirt] [PATCH] Regression: Report correct CPUs present on executing virsh nodecpumap

On Wed, May 24, 2017 at 8:09 PM, Ján Tomko <jtomko redhat com> wrote:
On Wed, May 24, 2017 at 07:46:00PM +0530, Nitesh Konkar wrote:
Recent changes to virbitmap.c file created a regression
where on executing the virsh nodecpumap command, the number
of CPUs present was shown as (last cpu online id + 1). This
patch fixes the issue.

Signed-off-by: Nitesh Konkar <nitkon12 linux vnet ibm com>
src/Makefile.am      |  2 ++
src/util/virbitmap.c | 10 ++++++++--
2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/util/virbitmap.c b/src/util/virbitmap.c
index eac63d997..dc427f430 100644
--- a/src/util/virbitmap.c
+++ b/src/util/virbitmap.c
@@ -37,6 +37,7 @@
#include "count-one-bits.h"
#include "virstring.h"
#include "virerror.h"
+#include "virhostcpu.h"


@@ -565,9 +566,14 @@ virBitmapParseUnlimited(const char *str)
    const char *cur = str;
    char *tmp;
    size_t i;
-    int start, last;
+    int start, last, bitmapSize;
+    bitmapSize = virHostCPUGetCount();


This function should be able to parse any bitmap, regardless of how many
CPUs the host has.

Hi Jan,

However, currently we get the following output, which is invalid.

# virsh nodecpumap
CPUs present:   73             <--- should be 80. 
CPUs online:    10
CPU map:        y-------y-------y-------y-------y-------y-------y-------y-------y-------y
# lscpu
Architecture:          ppc64le
Byte Order:            Little Endian
CPU(s):                80
On-line CPU(s) list:   0,8,16,24,32,40,48,56,64,72
Off-line CPU(s) list:  1-7,9-15,17-23,25-31,33-39,41-47,49-55,57-63,65-71,73-79
Thread(s) per core:    1
Core(s) per socket:    5
Socket(s):             2
NUMA node(s):          2
Model:                 2.1 (pvr 004b 0201)
Model name:            POWER8E (raw), altivec supported
L1d cache:             64K
L1i cache:             32K
L2 cache:              512K
L3 cache:              8192K
NUMA node0 CPU(s):     0,8,16,24,32
NUMA node1 CPU(s):     40,48,56,64,72

# ls /sys/devices/system/cpu | grep cpu[0-9] | wc -l 80

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