I have created a test kernel for Kinetic https://people.canonical.com/~mreed/hpe/lp_2008745_config_numa_emu/kinetic/
** Description changed: [Impact] Currently Ubuntu kernel has this kernel config disabled. But in some case, Intel's SPR-HBM needs this. Please search the keyword "fake numa" in https://community.intel.com/t5/Blogs/Products-and- Solutions/HPC/Enabling-High-Bandwidth-Memory-for-HPC-and-AI- Applications-for/post/1335100 [Fix] Enable CONFIG_NUMA_EMU in our kernel config for 5.15 and later [Test Plan] [Where problems could occur] The regression risk is low [Other Info] + Jammy + https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/jammy/+ref/lp_2008745_config_numa_emu + + Kinetic + + https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/kinetic/+ref/lp_2008745_config_numa_emu_kinetic ** Changed in: linux (Ubuntu Kinetic) Assignee: (unassigned) => Michael Reed (mreed8855) ** Changed in: linux (Ubuntu Jammy) Assignee: (unassigned) => Michael Reed (mreed8855) ** Description changed: [Impact] + Currently Ubuntu kernel has this kernel config disabled. - But in some case, Intel's SPR-HBM needs this. + But in some cases, Intel's Sapphire Rapids High Bandwith + Memory (SPR-HBM) needs this option. + + Memory bandwidth has been a bottleneck of increasingly memory bound + workloads. Sapphire Rapids plus HBM is specifically targeted to + cater to these workloads, traditionally served using overprovisioning + of memory devices. Please search the keyword "fake numa" in https://community.intel.com/t5/Blogs/Products-and- Solutions/HPC/Enabling-High-Bandwidth-Memory-for-HPC-and-AI- Applications-for/post/1335100 [Fix] Enable CONFIG_NUMA_EMU in our kernel config for 5.15 and later [Test Plan] [Where problems could occur] The regression risk is low [Other Info] Jammy https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/jammy/+ref/lp_2008745_config_numa_emu Kinetic https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/kinetic/+ref/lp_2008745_config_numa_emu_kinetic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2008745 Title: [SRU] Intel Sapphire Rapids HBM support needs CONFIG_NUMA_EMU Status in linux package in Ubuntu: Incomplete Status in linux source package in Jammy: Incomplete Status in linux source package in Kinetic: New Status in linux source package in Lunar: Incomplete Bug description: [Impact] Currently Ubuntu kernel has this kernel config disabled. But in some cases, Intel's Sapphire Rapids High Bandwith Memory (SPR-HBM) needs this option. Memory bandwidth has been a bottleneck of increasingly memory bound workloads. Sapphire Rapids plus HBM is specifically targeted to cater to these workloads, traditionally served using overprovisioning of memory devices. Please search the keyword "fake numa" in https://community.intel.com/t5/Blogs/Products-and- Solutions/HPC/Enabling-High-Bandwidth-Memory-for-HPC-and-AI- Applications-for/post/1335100 [Fix] Enable CONFIG_NUMA_EMU in our kernel config for 5.15 and later [Test Plan] [Where problems could occur] The regression risk is low [Other Info] Jammy https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/jammy/+ref/lp_2008745_config_numa_emu Kinetic https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/kinetic/+ref/lp_2008745_config_numa_emu_kinetic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2008745/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
