[LU-18739] max_pages_per_rpc gives "out of range" error for values less than 1M

• Type: Bug
• Resolution: Done
• Priority: Minor
• Severity: 3
• Assignee: Rahul Bansal
• Reporter: Rahul Bansal

Description

Failure, when the number of pages is mentioned in terms of total size, which is less than 1M:

[root@vbox tests]# lctl set_param osc.lustre-OST0000-osc-ffff9fd875168800.max_pages_per_rpc=0.5M
error: set_param: setting /sys/fs/lustre/osc/lustre-OST0000-osc-ffff9fd875168800/max_pages_per_rpc=0.5M: Numerical result out of range
error: set_param: setting 'osc/lustre-OST0000-osc-ffff9fd875168800/max_pages_per_rpc'='0.5M': Numerical result out of range

Working correctly, when the number of pages is given such that the total size is less than 1M:

[root@vbox lustre-release]# getconf PAGE_SIZE
4096
[root@vbox tests]# lctl set_param osc.lustre-OST0000-osc-ffff9fd875168800.max_pages_per_rpc=128
osc.lustre-OST0000-osc-ffff9fd875168800.max_pages_per_rpc=128 

Issue Links

• is related to: LU-18635 add non-page tunable max_mb_per_rpc_read/write parameters

Comments

[Rahul Bansal]

This is a minor BUG and will be fixed in https://jira.whamcloud.com/browse/LU-18635 ticket.