Hi，all：
I'm meeting a very serious problem on the chip of imx.6（linux version：4.1.15）。the system maybe suspend when run sometimes， and print rcu stall in sometimes just as show below，is anyone meet this problem or can provide some advice?
rcu_stall log:
<3>[20803.847018] INFO: rcu_sched detected stalls on CPUs/tasks:
<3>[20803.847051] 1: (1 GPs behind) idle=369/140000000000000/0 softirq=593036/593037 fqs=215772
<3>[20803.847060] (detected by 3, t=241692 jiffies, g=450146, c=450145, q=47215)
<6>[20803.847075] Task dump for CPU 1:
<6>[20803.847083] swapper/1 R running 0 0 1 0x00000002
<4>[20803.847120] [<c05f2a78>] (__schedule) from [<c05f2dbc>] (schedule+0xac/0xbc)
<4>[20803.847140] [<c05f2dbc>] (schedule) from [<c05f3120>] (schedule_preempt_disabled+0x18/0x1c)
<4>[20803.847164] [<c05f3120>] (schedule_preempt_disabled) from [<c006826c>] (cpu_startup_entry+0x36c/0x394)
<4>[20803.847187] [<c006826c>] (cpu_startup_entry) from [<c00153fc>] (secondary_start_kernel+0x118/0x134)
<4>[20803.847206] [<c00153fc>] (secondary_start_kernel) from [<1000952c>] (0x1000952c)
<3>[20866.897017] INFO: rcu_sched detected stalls on CPUs/tasks:
<3>[20866.897049] 1: (1 GPs behind) idle=369/140000000000000/0 softirq=593036/593037 fqs=221951
<3>[20866.897057] (detected by 3, t=247997 jiffies, g=450146, c=450145, q=48413)
<6>[20866.897072] Task dump for CPU 1:
<6>[20866.897082] swapper/1 R running 0 0 1 0x00000002
<4>[20866.897119] [<c05f2a78>] (__schedule) from [<c05f2dbc>] (schedule+0xac/0xbc)
<4>[20866.897141] [<c05f2dbc>] (schedule) from [<c05f3120>] (schedule_preempt_disabled+0x18/0x1c)
<4>[20866.897165] [<c05f3120>] (schedule_preempt_disabled) from [<c006826c>] (cpu_startup_entry+0x36c/0x394)
<4>[20866.897187] [<c006826c>] (cpu_startup_entry) from [<c00153fc>] (secondary_start_kernel+0x118/0x134)
<4>[20866.897206] [<c00153fc>] (secondary_start_kernel) from [<1000952c>] (0x1000952c)
