On Sat, Feb 28, 2004 at 05:26:44PM +0000, pankaj chauhan wrote:
>
> hi all ,
>
> i have a machine with 256Mb of RAM.
>
> i am using __get_free_pages{order 9} to get 2Mb memory
> ( want it to be continous) in a module. i am accessing
> this memory in interrupt context..
>
> my system crashes down when i access this memory in
> interrupt context. during allocation i check that if
> __get_free_pages fails ( pointer returned is NULL) , i
> return an error.so i hope i am using memory in the
> interrupt context only if __get_free_pages succeeded.
>
> plz tell me what may be possible problem
>
> Rgds,
> pankaj
>
>
It's not so clear if you alloc this memory during interrupt contex,
if so, you must specify as gfp_mask GFP_ATOMIC to tell kernel not to sleep.
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