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RHEL 8.6 on POWER9 with +4TB of memory boot times

  • 1.  RHEL 8.6 on POWER9 with +4TB of memory boot times

    Posted Wed October 18, 2023 04:19 PM

    Does anyone have any experience with large(+4TB of memory) RHEL8 LPARs on POWER9?  We are seeing delays on boot at the early kernel level when the LPARs have greater than 4TB of memory.   I got a case open but haven't really got any answers.  Has anyone come across this behavior?

    BOOT ~12:22:30 from console:
    ...
    [    0.000000] printk: log_buf_len min size: 1048576 bytes
    [    0.000000] printk: log_buf_len: 4194304 bytes
    [    0.000000] printk: early log buf free: 1032824(98%)

    < Hang on console until 12:37:20 (+15 minutes) >

    [    0.000000] Memory: 8588807232K/8597798912K available (15744K kernel code, 6016K rwdata, 7296K rodata, 5696K init, 12279K bss, 8991680K reserved, 0K cma-reserved)
    [    0.000000] random: get_random_u64 called from kmem_cache_open+0x608/0xa70 with crng_init=0
    [    0.000000] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=512, Nodes=32
    ...
    login less than a 2 minutes later



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    Matthew Opoka
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  • 2.  RE: RHEL 8.6 on POWER9 with +4TB of memory boot times

    Posted Wed November 01, 2023 09:20 AM

    Hi Matthew

    Any news about this ???

    Its always good to know.



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    Cesar Daniel Delgado Ponce
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    Original Message


  • 3.  RE: RHEL 8.6 on POWER9 with +4TB of memory boot times

    Posted Tue September 03, 2024 06:42 AM

    Hi Matthew,

    We have quite a lot of RedHat systems between 4-8TB but have only just started building 8.6. I assume you had no problems before 8.6?

    Regards,

    Henrik Morsing



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    Henrik Morsing
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    Original Message