[LU-16454] can't set max_mod_rpcs_in_flight > 8

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Affects Version/s: Lustre 2.15.1
• Severity: 3
• Assignee: Vitaliy Kuznetsov
• Reporter: Mahmoud Hanafi

Description

I am trying to increase mdc.*.max_mod_rpcs_in_flight to grater than 8 but I get an error.

 

# lctl set_param mdc.fs1-MDT0000-mdc-ffff902107a5e000.max_rpcs_in_flight=128
mdc.fs1-MDT0000-mdc-ffff902107a5e000.max_rpcs_in_flight=128

#lctl set_param mdc.fs1-MDT0000-mdc-ffff902107a5e000.max_mod_rpcs_in_flight=127
error: set_param: setting /sys/fs/lustre/mdc/fs1-MDT0000-mdc-ffff902107a5e000/max_mod_rpcs_in_flight=127: Numerical result out of range

# lctl get_param version
version=2.15.1

Issue Links

• has to be finished together with: LU-16558 Сan't set max_mod_rpcs_in_flight > 8 (Default value)
• is related to: LU-14144 get and set Lustre module parameters via "lctl get_param/set_param"
• is related to: LU-13503 allow setting larger max_mod_rpcs_in_flight dynamically