Re: Numa=on broken?

[Ryan Harper <ryanh@us.ibm.com>]

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* Subrahmanian, Raj <raj.subrahmanian@unisys.com> [2007-05-04 01:23]:
> Ryan,
> I did check out the mail discussion where you encountered and fixed
> this.
> I am seeing this again on 15009, unstable and in 15021 3.1. rc7.
> I have included the debug messages in both runs.

Hrm, well, we need to see which node the request is failing in so we can
figure out how to initialize the heap.  I'm attaching a patch that
should hopefully dump out which node the memory request is failing in.

Last time, it was the xmalloc() in xen/common/page_alloc.c in
init_heap_pages().

Give this patch a spin and email me the output.

I'd also be interested in your SRAT table output for this machine.

-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253   T/L: 678-9253
ryanh@us.ibm.com

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diff -r 3a5722420de7 xen/common/page_alloc.c
--- a/xen/common/page_alloc.c	Thu May 03 19:25:47 2007 +0100
+++ b/xen/common/page_alloc.c	Fri May 04 08:29:48 2007 -0500
@@ -353,6 +353,8 @@ static struct page_info *alloc_heap_page
     ASSERT(zone_lo <= zone_hi);
     ASSERT(zone_hi < NR_ZONES);
 
+    printk("%s: request for node %d\n", node);
+
     if ( unlikely(order > MAX_ORDER) )
         return NULL;
 
@@ -543,8 +545,10 @@ void init_heap_pages(
 
         if ( !avail[nid_curr] )
         {
+            printk("%s: attempting to initialize avail[%d]\n", nid_curr);
             avail[nid_curr] = xmalloc_array(unsigned long, NR_ZONES);
             memset(avail[nid_curr], 0, NR_ZONES * sizeof(long));
+            printk("%s: attempting to initialize _heap[%d]\n", nid_curr);
             _heap[nid_curr] = xmalloc(heap_by_zone_and_order_t);
             init_heap_block(_heap[nid_curr]);
         }

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