[LU-1249] lctl set_param debug_mb=10 gives Invalid argument

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.3.0, Lustre 2.1.3
• Affects Version/s: Lustre 2.3.0, Lustre 2.1.1
• Environment: RHEL 6.2 with no updates.; Installed using Platform HPC 3.1 (build 7211) and does therefore contain extra packages from Platform Computing.
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Frey Alfredsson

Description

Step 1: Install RHEL 6.2 using Platform HPC 3.1.
Apart from the Platform HPC 3.1 extra packages, there are no custom changes to the RHEl 6.2 distribution nor updates at this point.

Step 2: Packages installed.
kernel-2.6.32-220.el6_lustre.g4554b65.x86_64.rpm
kernel-debuginfo-2.6.32-220.el6_lustre.g4554b65.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.el6_lustre.g4554b65.x86_64.rpm
kernel-devel-2.6.32-220.el6_lustre.g4554b65.x86_64.rpm
kernel-firmware-2.6.32-220.el6_lustre.g4554b65.x86_64.rpm
kernel-headers-2.6.32-220.el6_lustre.g4554b65.x86_64.rpm
lustre-2.1.1-2.6.32_220.el6_lustre.g4554b65.x86_64.x86_64.rpm
lustre-debuginfo-2.1.1-2.6.32_220.el6_lustre.g4554b65.x86_64.x86_64.rpm
lustre-ldiskfs-3.3.0-2.6.32_220.el6_lustre.g4554b65.x86_64.x86_64.rpm
lustre-ldiskfs-debuginfo-3.3.0-2.6.32_220.el6_lustre.g4554b65.x86_64.x86_64.rpm
lustre-modules-2.1.1-2.6.32_220.el6_lustre.g4554b65.x86_64.x86_64.rpm
lustre-source-2.1.1-2.6.32_220.el6_lustre.g4554b65.x86_64.x86_64.rpm
lustre-tests-2.1.1-2.6.32_220.el6_lustre.g4554b65.x86_64.x86_64.rpm
perf-2.6.32-220.el6_lustre.g4554b65.x86_64.rpm
perf-debuginfo-2.6.32-220.el6_lustre.g4554b65.x86_64.rpm
python-perf-2.6.32-220.el6_lustre.g4554b65.x86_64.rpm

Step 3: Computer rebooted.

Step 4: Run lctl set_param debug_mb=10
[root@storage000 ~]# lctl set_param debug_mb=10
debug_mb=10
error: set_param: writing to file /proc/sys/lnet/debug_mb: Invalid argument
[root@storage000 ~]#

[root@storage000 ~]# cat /proc/sys/lnet/debug_mb
121
[root@storage000 ~]# echo 10 > /proc/sys/lnet/debug_mb
-bash: echo: write error: Invalid argument
[root@storage000 ~]#

This error is reproduced every time after following the steps above.

Issue Links

• is duplicated by: LU-958 tests: debug_mb set incorrectly for smp or vm
• Trackbacks: Changelog 2.1 Changes from version 2.1.2 to version 2.1.3 Server support for kernels: 2.6.18308.13.1.el5 (RHEL5) 2.6.32279.2.1.el6 (RHEL6) Client support for unpatched kernels: 2.6.18308.13.1.el5 (RHEL5) 2.6.32279.2.1....