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[3/3] Partial revert of 81c98869faa5 ("kthread: ensure locality of task_struct allocations")

Message ID 20140909190630.GF22906@linux.vnet.ibm.com (mailing list archive)
State Not Applicable
Delegated to: Michael Ellerman
Headers show

Commit Message

Nishanth Aravamudan Sept. 9, 2014, 7:06 p.m. UTC 
After discussions with Tejun, we don't want to spread the use of
cpu_to_mem() (and thus knowledge of allocators/NUMA topology details)
into callers, but would rather ensure the callees correctly handle
memoryless nodes. With the previous patches ("topology: add support for
node_to_mem_node() to determine the fallback node" and "slub: fallback
to node_to_mem_node() node if allocating on memoryless node") adding and
using node_to_mem_node(), we can safely undo part of the change to the
kthread logic from 81c98869faa5.

Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
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Patch

diff --git a/kernel/kthread.c b/kernel/kthread.c
index ef483220e855..10e489c448fe 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -369,7 +369,7 @@  struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data),
 {
 	struct task_struct *p;
 
-	p = kthread_create_on_node(threadfn, data, cpu_to_mem(cpu), namefmt,
+	p = kthread_create_on_node(threadfn, data, cpu_to_node(cpu), namefmt,
 				   cpu);
 	if (IS_ERR(p))
 		return p;