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authorEric Dumazet <eric.dumazet@gmail.com>2011-03-22 16:30:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:44:01 -0700
commit207205a2ba2655652fe46a60b49838af6c16a919 (patch)
tree4309aa7cd5cf39c805219001e0ed8ec5b71e4d5e /kernel/fork.c
parentb6a84016bd2598e35ead635147fa53619982648d (diff)
downloadop-kernel-dev-207205a2ba2655652fe46a60b49838af6c16a919.zip
op-kernel-dev-207205a2ba2655652fe46a60b49838af6c16a919.tar.gz
kthread: NUMA aware kthread_create_on_node()
All kthreads being created from a single helper task, they all use memory from a single node for their kernel stack and task struct. This patch suite creates kthread_create_on_node(), adding a 'cpu' parameter to parameters already used by kthread_create(). This parameter serves in allocating memory for the new kthread on its memory node if possible. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Tejun Heo <tj@kernel.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index cbc6adc..a8f64f8e 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -40,6 +40,7 @@
#include <linux/tracehook.h>
#include <linux/futex.h>
#include <linux/compat.h>
+#include <linux/kthread.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/rcupdate.h>
#include <linux/ptrace.h>
@@ -254,7 +255,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
struct task_struct *tsk;
struct thread_info *ti;
unsigned long *stackend;
- int node = numa_node_id();
+ int node = tsk_fork_get_node(orig);
int err;
prepare_to_copy(orig);
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