Messages in this thread | | | Date | Tue, 23 May 2006 14:54:45 -0500 | From | Nathan Lynch <> | Subject | Re: cpu hotplug sleeping from invalid context |
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Dave Jones wrote: > (2.6.17rc4-git9) > > echo 0 > /sys/devices/system/cpu/cpu1/online > echo 1 > /sys/devices/system/cpu/cpu1/online > > on my dual-core notebook gets me this: > > CPU 1 is now offline > SMP alternatives: switching to UP code > SMP alternatives: switching to SMP code > Booting processor 1/1 eip 3000 > CPU 1 irqstacks, hard=c0799000 soft=c0779000 > Initializing CPU#1 > BUG: sleeping function called from invalid context at mm/page_alloc.c:945 > in_atomic():0, irqs_disabled():1 > <c04500ce> __alloc_pages+0x32/0x2a8 > <c0425577> printk+0x1f/0xaf > <c060674d> schedule+0xa21/0xa8a > <c04503a6> get_zeroed_page+0x31/0x3d > <c040a117> cpu_init+0x10a/0x323 > <c04176f5> start_secondary+0xc/0x3ef > <c0417afa> cpu_exit_clear+0x22/0x43
I think it's caused by arch/i386/kernel/cpu/common.c::cpu_init() doing get_zeroed_page(GFP_KERNEL).
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