vmalloc() in interrupt context

[Amit Dror]

Hi,

I have a kernel driver that needs to dynamically allocate large amounts of
memory in interrupt context.

I can't use kmalloc(GFP_ATOMIC) or get_free_pages(GFP_ATOMIC) since they are
limited to 131056 bytes.

I can't allocate the memory at the device initialization because the driver
is a loadable module and is not compiled into the kernel.

I would like to use vmalloc to get a virtually contiguous memory (DMA is not
an issue) but the problem is that vmalloc uses kmalloc(GFP_KERNEL) and
__get_free_page(GFP_KERNEL) and these are not allowed in  interrupt context.

Are there any plans to add a priority argument to vmalloc that will specify
the priority passed to kmalloc and __get_free_page ?  (I assume this could
solve my problem).

Is there any other way to work around this problem ?

Amit Dror,
Check Point Software Technologies Ltd.