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  1. Lustre
  2. LU-18739

max_pages_per_rpc gives "out of range" error for values less than 1M

Details

    • Bug
    • Resolution: Done
    • Minor
    • None
    • None
    • None
    • 3
    • 9223372036854775807

    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

      Attachments

        Issue Links

          is related to

          Improvement - An improvement or enhancement to an existing feature or task. LU-18635 add non-page tunable max_mb_per_rpc_read/write parameters

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • In Progress

          Activity

            [LU-18739] max_pages_per_rpc gives "out of range" error for values less than 1M
            Bansal Rahul Bansal made changes -
            Resolution New: Done [ 10000 ]
            Status Original: Open [ 1 ] New: Closed [ 6 ]
            Bansal Rahul Bansal made changes -
            Description Original: Failure, when the number of pages is mentioned in terms of total size, which is less than 1M:
            {noformat}
            [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
            {noformat}
            Working correctly, when the number of pages is given such that the total size is less than 1M:
            {noformat}
            [root@vbox lustre-release]# getconf PAGE_SIZE
            4096
            [root@vbox tests]# lctl get_param osc.lustre-OST0000-osc-ffff9fd875168800.max_pages_per_rpc
            osc.lustre-OST0000-osc-ffff9fd875168800.max_pages_per_rpc=128
            {noformat}             		New: Failure, when the number of pages is mentioned in terms of total size, which is less than 1M:
            {noformat}
            [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
            {noformat}
            Working correctly, when the number of pages is given such that the total size is less than 1M:
            {noformat}
            [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 {noformat}
            Bansal Rahul Bansal made changes -
            Assignee Original: WC Triage [ wc-triage ] New: Rahul Bansal [ Bansal ]
            Bansal Rahul Bansal made changes -
            Link New: This issue is related to LU-18635 [ LU-18635 ]
            Bansal Rahul Bansal created issue -

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              Bansal Rahul Bansal
              Bansal Rahul Bansal
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              Dates

                Created:
                Updated:
                Resolved: