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  1. Lustre
  2. LU-8700

dkms fails to build lustre on Power8 due to llite_loop missing

Details

    • Bug
    • Resolution: Fixed
    • Major
    • Lustre 2.9.0
    • Lustre 2.8.0, Lustre 2.9.0
    • None
    • Power8 clients running RHEL7.
    • 3
    • 9223372036854775807

    Description

      On the Power8 platform the llite_loop device is not built but the dkms spec files expect that the llite_loop.ko is present. This causes lustre to fail to install using dkms on Power8 clients.

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          is related to

          New Feature - A new feature of the product, which has yet to be developed. LU-6387 Add Power8 support to Lustre

          • Major - Major loss of function.
          • Resolved

          Activity

            [LU-8700] dkms fails to build lustre on Power8 due to llite_loop missing
            pjones Peter Jones added a comment -

            Landed for 2.9

            pjones Peter Jones added a comment - Landed for 2.9
            gerrit Gerrit Updater added a comment -

            Oleg Drokin (oleg.drokin@intel.com) merged in patch http://review.whamcloud.com/23228/
            Subject: LU-8700 build: dkms do not install llite_lloop
            Project: fs/lustre-release
            Branch: master
            Current Patch Set:
            Commit: 21bed01ff234a239e4b044b099d53ba2fe7ca24a

            gerrit Gerrit Updater added a comment - Oleg Drokin (oleg.drokin@intel.com) merged in patch http://review.whamcloud.com/23228/ Subject: LU-8700 build: dkms do not install llite_lloop Project: fs/lustre-release Branch: master Current Patch Set: Commit: 21bed01ff234a239e4b044b099d53ba2fe7ca24a
            bfaccini Bruno Faccini (Inactive) added a comment - - edited

            Gerrit-change #23228 now simply always ignore llite_lloop.ko module in DKMS.

            bfaccini Bruno Faccini (Inactive) added a comment - - edited Gerrit-change #23228 now simply always ignore llite_lloop.ko module in DKMS.
            bfaccini Bruno Faccini (Inactive) added a comment -

            Well in fact seems that I have misunderstood llite_lloop.ko module's features/usages, and its is mostly being used for Clients as it is mainly allowing Clients to use a Lustre file as a block-device (for example as their swap-device for diskless Clients, ...).
            So I will modify my Gerrit-change #23228 to allow DKMS to build/create llite_lloop.ko module for/on both Lustre Clients and Servers, but only if their PAGE_SIZE < 65536.

            bfaccini Bruno Faccini (Inactive) added a comment - Well in fact seems that I have misunderstood llite_lloop.ko module's features/usages, and its is mostly being used for Clients as it is mainly allowing Clients to use a Lustre file as a block-device (for example as their swap-device for diskless Clients, ...). So I will modify my Gerrit-change #23228 to allow DKMS to build/create llite_lloop.ko module for/on both Lustre Clients and Servers, but only if their PAGE_SIZE < 65536.
            gerrit Gerrit Updater added a comment -

            Faccini Bruno (bruno.faccini@intel.com) uploaded a new patch: http://review.whamcloud.com/23228
            Subject: LU-8700 build: dkms only build llite_lloop for servers
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: 2380750551c03a312e5abf5b010c3d5213292e70

            gerrit Gerrit Updater added a comment - Faccini Bruno (bruno.faccini@intel.com) uploaded a new patch: http://review.whamcloud.com/23228 Subject: LU-8700 build: dkms only build llite_lloop for servers Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: 2380750551c03a312e5abf5b010c3d5213292e70
            bfaccini Bruno Faccini (Inactive) added a comment - - edited

            I understand that llite_lloop.ko is not built for Power8 platform due to PAGE_SIZE == 65536, but I wonder if, due to its specific purpose/usage, it is not just/simply ok to ignore it during DKMS Client builds. On the other hand, in dkms.mkconf, do we need to find the PAGE_SIZE for the Kernel we build against (quite easy to implement) or just determine if it is a Lustre Server/Client build/package (much more easy!!) ??

            bfaccini Bruno Faccini (Inactive) added a comment - - edited I understand that llite_lloop.ko is not built for Power8 platform due to PAGE_SIZE == 65536, but I wonder if, due to its specific purpose/usage, it is not just/simply ok to ignore it during DKMS Client builds. On the other hand, in dkms.mkconf, do we need to find the PAGE_SIZE for the Kernel we build against (quite easy to implement) or just determine if it is a Lustre Server/Client build/package (much more easy!!) ??
            bfaccini Bruno Faccini (Inactive) added a comment -

            This should be handled in dkms.mkconf during on-target configure step. I will cook a patch to implement it.

            bfaccini Bruno Faccini (Inactive) added a comment - This should be handled in dkms.mkconf during on-target configure step. I will cook a patch to implement it.

            People

              bfaccini Bruno Faccini (Inactive)
              simmonsja James A Simmons
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              Dates

                Created:
                Updated:
                Resolved: