kdump takes a long time to collect vmcore

Solution Verified - Updated -


  • A crash dump stopped responding in the kdump kernel context due to an excessive interrupt load.
[    6.986829] hpet1: lost 119 rtc interrupts
[    8.729969] hpet1: lost 109 rtc interrupts
  • Kdump slowly collect vmcore. It took around two hours to complete collecting vmcore. While capturing vmcore, the kdump console continuously shows: hpet1: lost XXXX rtc interrupts


  • Red Hat Enterprise Linux 8.1
  • kernel-4.18.0-147.64.1.el8_1
  • Lenovo ThinkSystem SR650 V2
  • HPE Apollo 2000 Gen10 Plus
  • HPE ProLiant MicroServer Gen10 Plus

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