[LU-11898] libcfs module parameter libcfs_debug_mb has no effect

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0
• Severity: 3
• Assignee: Vladimir Saveliev
• Reporter: Vladimir Saveliev

Description

debug_mb is libcfs module parameter. It should be possible to set it
via

modprobe libcfs libcfs_debug_mb=800

or via adding

options libcfs libcfs_debug_mb=800

to modules configuration.

libcfs_debug_init, however, calculated libcfs_debug_mb unconditionally, so that the module parameter makes no effect:

int libcfs_debug_init(unsigned long bufsize)
...
        libcfs_debug_mb = cfs_trace_get_debug_mb();
...

Issue Links

• is related to: LU-8066 Move lustre procfs handling to sysfs and debugfs.