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    Subjectlinux/drivers/cpuidle: cpuidle_enter_state() issue
    Hi Kernel-developers,

    The flowing call trace was catch from kernel-v4.15, could anyone help
    to analysis the cpuidle problem?
    or, if you need any more detail info pls let me know.

    Test Env:
    IBM KVM Guest on ibm-p8-kvm-03
    POWER8E (raw), altivec supported
    9216 MB memory, 107 GB disk space

    --------8<----------------
    [15002.722413] swapper/15: page allocation failure: order:0,
    mode:0x1080020(GFP_ATOMIC), nodemask=(null)
    [15002.853793] swapper/15 cpuset=/ mems_allowed=0
    [15002.853932] CPU: 15 PID: 0 Comm: swapper/15 Not tainted 4.15.0 #1
    [15002.854019] Call Trace:
    [15002.854129] [c00000023ff77650] [c000000000940b50]
    .dump_stack+0xac/0xfc (unreliable)
    [15002.854285] [c00000023ff776e0] [c00000000026c678] .warn_alloc+0xe8/0x180
    [15002.854376] [c00000023ff777a0] [c00000000026d50c]
    .__alloc_pages_nodemask+0xd6c/0xf90
    [15002.854490] [c00000023ff77980] [c0000000002e9cc0]
    .alloc_pages_current+0x90/0x120
    [15002.854624] [c00000023ff77a10] [c0000000007990cc]
    .skb_page_frag_refill+0x8c/0x120
    [15002.854746] [c00000023ff77aa0] [d000000003a561a8]
    .try_fill_recv+0x368/0x620 [virtio_net]
    [15003.422855] [c00000023ff77ba0] [d000000003a568ec]
    .virtnet_poll+0x25c/0x380 [virtio_net]
    [15003.423864] [c00000023ff77c70] [c0000000007c18d0] .net_rx_action+0x330/0x4a0
    [15003.424024] [c00000023ff77d90] [c000000000960d50] .__do_softirq+0x150/0x3a8
    [15003.424197] [c00000023ff77e90] [c0000000000ff608] .irq_exit+0x198/0x1b0
    [15003.424342] [c00000023ff77f10] [c000000000015504] .__do_irq+0x94/0x1f0
    [15003.424485] [c00000023ff77f90] [c000000000026d5c] .call_do_irq+0x14/0x24
    [15003.424627] [c00000023bc63820] [c0000000000156ec] .do_IRQ+0x8c/0x100
    [15003.424776] [c00000023bc638c0] [c000000000008b34]
    hardware_interrupt_common+0x114/0x120
    [15003.424963] --- interrupt: 501 at .snooze_loop+0xa4/0x1c0
    LR = .snooze_loop+0x60/0x1c0
    [15003.425164] [c00000023bc63bb0] [c00000023bc63c50]
    0xc00000023bc63c50 (unreliable)
    [15003.425346] [c00000023bc63c30] [c00000000075104c]
    .cpuidle_enter_state+0xac/0x390
    [15003.425534] [c00000023bc63ce0] [c000000000157adc] .call_cpuidle+0x3c/0x70
    [15003.425669] [c00000023bc63d50] [c000000000157e90] .do_idle+0x2a0/0x300
    [15003.425815] [c00000023bc63e20] [c0000000001580ac]
    .cpu_startup_entry+0x2c/0x40
    [15003.425995] [c00000023bc63ea0] [c000000000045790]
    .start_secondary+0x4d0/0x520
    [15003.426170] [c00000023bc63f90] [c00000000000aa70]
    start_secondary_prolog+0x10/0x14
    -------------8<-------------------

    Any response will be appreciated!

    --
    Regards,
    Li Wang
    Email: wangli.ahau@gmail.com

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