On Wed, 03 Oct 2007 20:59:49 -0700
Christoph Lameter <clameter@sgi.com> wrote:

quoted text
> Make the stack size configurable now that we can fallback to vmalloc
> if necessary. SGI NUMA configurations may need more stack because
> cpumasks and nodemasks are at times kept on the stack. With the
> coming 16k cpu support this is going to be 2k just for the mask. This
> patch allows to run with 16k or 32k kernel stacks on x86_74.

there is still code that does DMA from and to the stack....
how would this work with virtual allocated stack?
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