Running:
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/usr/bin/numactl --length 10485760 --file /var/run/buffer --membind 1 --touchBack trace is as follows:
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[root@localhost ~]# gdb -c ./core.15192 /usr/bin/numactl
GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-115.el7
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/numactl...Reading symbols from /usr/lib/debug/usr/bin/numactl.debug...done.
done.
[New LWP 15192]
Core was generated by `/usr/bin/numactl --length 10485760 --file /var/run/capture1_vi_buf --membind 1'.
Program terminated with signal 11, Segmentation fault.
#0 0x00007ff979c428e3 in numa_police_memory (mem=0x7ff978c5a000, size=10485760) at libnuma.c:863
863 ((volatile char*)mem)[i] = ((volatile char*)mem)[i];
(gdb) bt
#0 0x00007ff979c428e3 in numa_police_memory (mem=0x7ff978c5a000, size=10485760) at libnuma.c:863
#1 0x000000000040215e in main (ac=8, av=0x7ffeeea74bc8) at numactl.c:614
I see nothing in the log files - well besides the segfault being logged.
This failed running with an older kernel (3.10.0-957.10.1.el7.x86_64) as well as the current kernel (3.10.0-1062.1.1.el7.x86_64).
Running:
[root@localhost ~]# uname -a
Linux localhost.localdomain 3.10.0-1062.1.1.el7.x86_64 #1 SMP Fri Sep 13 22:55:44 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost ~]# rpm -q -f /usr/bin/numactl
numactl-2.0.12-3.el7.x86_64
It works fine with no core dump with numactl-2.0.9-7.el7.x86_64:
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[root@localhost ~]# /usr/bin/numactl --length 10485760 --file /var/run/buffer --membind 1 --touch
[root@localhost ~]# echo $?
0
[root@localhost ~]# uname -a
Linux localhost.localdomain 3.10.0-957.10.1.el7.x86_64 #1 SMP Mon Mar 18 15:06:45 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost ~]# rpm -q -f /usr/bin/numactl
numactl-2.0.9-7.el7.x86_64
-- Patrick
