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Hugepage 全体を割り当てているときに khugepaged が mmap_sem で Read Lock を保持し、Kernel panic - not syncing: hung_task: blocked tasks: が発生する

Solution In Progress - Updated 2017-02-08T06:46:03+00:00 -

Issue

ハングアップしたタスクの検出スレッド (khungtaskd) が、mmap_sem タスクが長時間ブロックされていて、khugepaged が競っているリソースの所有者になっていることを検出したため、カーネルパニックが発生しました。

Environment

Red Hat Enterprise Linux 6.7
Red Hat Enterprise Linux 7.2

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