The patch titled
numa: mempolicy: dynamic interleave map for system init
has been added to the -mm tree. Its filename is
numa-mempolicy-dynamic-interleave-map-for-system-init.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: numa: mempolicy: dynamic interleave map for system init
From: Paul Mundt <lethal@xxxxxxxxxxxx>
Signed-off-by: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Cc: Lee Schermerhorn <lee.schermerhorn@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mempolicy.c | 31 ++++++++++++++++++++++++++++---
1 files changed, 28 insertions(+), 3 deletions(-)
diff -puN mm/mempolicy.c~numa-mempolicy-dynamic-interleave-map-for-system-init mm/mempolicy.c
--- a/mm/mempolicy.c~numa-mempolicy-dynamic-interleave-map-for-system-init
+++ a/mm/mempolicy.c
@@ -1597,6 +1597,10 @@ void mpol_free_shared_policy(struct shar
/* assumes fs == KERNEL_DS */
void __init numa_policy_init(void)
{
+ nodemask_t interleave_nodes;
+ unsigned long largest = 0;
+ int nid, prefer = 0;
+
policy_cache = kmem_cache_create("numa_policy",
sizeof(struct mempolicy),
0, SLAB_PANIC, NULL, NULL);
@@ -1605,10 +1609,31 @@ void __init numa_policy_init(void)
sizeof(struct sp_node),
0, SLAB_PANIC, NULL, NULL);
- /* Set interleaving policy for system init. This way not all
- the data structures allocated at system boot end up in node zero. */
+ /*
+ * Set interleaving policy for system init. Interleaving is only
+ * enabled across suitably sized nodes (default is >= 16MB), or
+ * fall back to the largest node if they're all smaller.
+ */
+ nodes_clear(interleave_nodes);
+ for_each_online_node(nid) {
+ unsigned long total_pages = node_present_pages(nid);
+
+ /* Preserve the largest node */
+ if (largest < total_pages) {
+ largest = total_pages;
+ prefer = nid;
+ }
+
+ /* Interleave this node? */
+ if ((total_pages << PAGE_SHIFT) >= (16 << 20))
+ node_set(nid, interleave_nodes);
+ }
+
+ /* All too small, use the largest */
+ if (unlikely(nodes_empty(interleave_nodes)))
+ node_set(prefer, interleave_nodes);
- if (do_set_mempolicy(MPOL_INTERLEAVE, &node_online_map))
+ if (do_set_mempolicy(MPOL_INTERLEAVE, &interleave_nodes))
printk("numa_policy_init: interleaving failed\n");
}
_
Patches currently in -mm which might be from lethal@xxxxxxxxxxxx are
slab-fix-alien-cache-handling.patch
potential-parse-error-in-ifdef-part-3.patch
lots-of-architectures-enable-arbitary-speed-tty-support.patch
git-sh.patch
numa-mempolicy-dynamic-interleave-map-for-system-init.patch
pvr2fb-fix-pseudo_palette-array-overrun-and-typecast.patch
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