Re: How to understand and turn off such a oops

[Michal Schmidt]

Park Lee wrote:
> Hi,
>   Sometimes, when I call kmalloc() in Linux kernel,
> the kernel always bring out a oops shown as following:
>
>
> Debug: sleeping function called from invalid context
> at mm/slab.c:1980
> in_atomic():1, irqs_disabled():0

You're calling kmalloc in a context where sleeping is not allowed. And 
kmalloc with the GFP_KERNEL flag can sleep. Use GFP_ATOMIC in that context.

Michal
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