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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-03-22 16:30:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-22 17:44:01 -0700 |
| commit | 504f52b5439aaf26d3e2c1d45ec10fce38c8dd27 (patch) | |
| tree | cb46d72c50e843c36540c88ef8c9000dff31c1c8 /kernel | |
| parent | 9d502c1c8d47b337c378c2ac8eaeee7918ad16b1 (diff) | |
mm: NUMA aware alloc_task_struct_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_cpu(), 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 available.
Users of this new function are : ksoftirqd, kworker, migration, pktgend...
This patch:
Add a node parameter to alloc_task_struct(), and change its name to
alloc_task_struct_node()
This change is needed to allow NUMA aware kthread_create_on_cpu()
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')
| -rw-r--r-- | kernel/fork.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 05b92c457010..cffbe8a4e1fc 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -109,8 +109,10 @@ int nr_processes(void) } #ifndef __HAVE_ARCH_TASK_STRUCT_ALLOCATOR -# define alloc_task_struct() kmem_cache_alloc(task_struct_cachep, GFP_KERNEL) -# define free_task_struct(tsk) kmem_cache_free(task_struct_cachep, (tsk)) +# define alloc_task_struct_node(node) \ + kmem_cache_alloc_node(task_struct_cachep, GFP_KERNEL, node) +# define free_task_struct(tsk) \ + kmem_cache_free(task_struct_cachep, (tsk)) static struct kmem_cache *task_struct_cachep; #endif @@ -249,12 +251,12 @@ 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 err; prepare_to_copy(orig); - tsk = alloc_task_struct(); + tsk = alloc_task_struct_node(node); if (!tsk) return NULL; |