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XFS:在 RHEL 中,当 naming 使用 64k 块大小时,可能会在 kmem_alloc 中出现内存分配死锁的问题

Solution In Progress - Updated -

Issue

  • 使用文件系统的进程变得无响应,内核会在日志中记录以下信息。
    XFS: rsync(12542) possible memory allocation deadlock size 65728 in kmem_alloc (mode:0x250)

  • Ceph OSD 正在被终止,内核会在日志中记录以下消息。
    XFS: possible memory allocation deadlock in kmem_alloc (mode:0x8250)

注: 在 3.10.0-514.el7 (RHEL7.3) 中增加了进程和分配大小的详细信息。

Environment

  • Red Hat Ceph Storage 1.3

    • kernel 3.10.0-123.20.1.el7
  • Red Hat Enterprise Linux 7

    • Kernel-3.10.0-1062.el7

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