Messages in this thread | | | Date | Fri, 21 Mar 2008 00:25:02 -0700 (PDT) | Subject | Re: [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86 | From | David Miller <> |
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From: Christoph Lameter <clameter@sgi.com> Date: Thu, 20 Mar 2008 23:17:14 -0700
> This allows fallback for order 1 stack allocations. In the fallback > scenario the stacks will be virtually mapped. > > Signed-off-by: Christoph Lameter <clameter@sgi.com>
I would be very careful with this especially on IA64.
If the TLB miss or other low-level trap handler depends upon being able to dereference thread info, task struct, or kernel stack stuff without causing a fault outside of the linear PAGE_OFFSET area, this patch will cause problems.
It will be difficult to debug the kinds of crashes this will cause too.
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