Bug 1281711

Summary: numad get SIGFPE when use numad with -w
Product: Red Hat Enterprise Linux 7 Reporter: Luyao Huang <lhuang>
Component: numadAssignee: Jan Synacek <jsynacek>
Status: CLOSED ERRATA QA Contact: Petr Sklenar <psklenar>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.2CC: bgray, dyuan, jhladky, jscotka, lmiksik, psklenar, thozza
Target Milestone: rc   
Target Release: 7.3   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: numad-0.5-17.20150602git.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-11-04 06:09:40 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Luyao Huang 2015-11-13 08:43:58 UTC 
Description of problem:
numad get SIGFPE when use numad with -w

Version-Release number of selected component (if applicable):
numad-0.5-14.20140620git.el7.x86_64

How reproducible:
100% (on a UMA)

Steps to Reproduce:
1.
# numactl --hard
available: 1 nodes (0)
node 0 cpus: 0 1 2 3
node 0 size: 7365 MB
node 0 free: 197 MB
node distances:
node   0 
  0:  10

2.
# numad -w 5
Floating point exception (core dumped)

3.

Actual results:
numad get SIGFPE when use numad with -w


Expected results:
return 0 node

Additional info:

Program received signal SIGFPE, Arithmetic exception.
0x0000000000407470 in pick_numa_nodes (pid=pid@entry=-1, cpus=500, mbs=0, assume_enough_cpus=assume_enough_cpus@entry=0) at numad.c:2018
2018	        uint64_t prorated_CPU = (process_CPUs * process_MBs[ix]) / mbs;
(gdb) p mbs
$1 = 0
(gdb) bt
#0  0x0000000000407470 in pick_numa_nodes (pid=pid@entry=-1, cpus=500, mbs=0, assume_enough_cpus=assume_enough_cpus@entry=0) at numad.c:2018
#1  0x00000000004022b1 in main (argc=<optimized out>, argv=0x7fffffffdf68) at numad.c:2683
Comment 1 Jan Synacek 2016-07-11 07:17:40 UTC 
*** Bug 1310259 has been marked as a duplicate of this bug. ***
Comment 17 errata-xmlrpc 2016-11-04 06:09:40 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2414.html