On Apr 24, 2008, at 2:18 AM, Benjamin Herrenschmidt wrote:
On Thu, 2008-04-24 at 00:37 -0500, Kumar Gala wrote:
+ /*
+ * interrupt stacks must be under 256MB, we cannot afford to
take
+ * SLB misses on them.
+ */
+ for_each_possible_cpu(i) {
+ softirq_ctx[i] = (struct thread_info *)
+ __va(lmb_alloc_base(THREAD_SIZE,
+ THREAD_SIZE,
0x10000000));
+ hardirq_ctx[i] = (struct thread_info *)
+ __va(lmb_alloc_base(THREAD_SIZE,
+ THREAD_SIZE,
0x10000000));
+ }
+
The comment is a bit bogus :-) (about SLB misses). lowmem is your
limit
I think. Also, why not share the code with ppc64 ?
I'm going to change it to be just lmb_alloc() so it will be difficult
to share with ppc64 (other than w/an ifdef).
- k
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