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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 /arch/ia64 | |
| parent | 9d502c1c8d47b337c378c2ac8eaeee7918ad16b1 (diff) | |
| download | op-kernel-dev-504f52b5439aaf26d3e2c1d45ec10fce38c8dd27.zip op-kernel-dev-504f52b5439aaf26d3e2c1d45ec10fce38c8dd27.tar.gz | |
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 'arch/ia64')
| -rw-r--r-- | arch/ia64/include/asm/thread_info.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/ia64/include/asm/thread_info.h b/arch/ia64/include/asm/thread_info.h index b6a5ba2..342004bb 100644 --- a/arch/ia64/include/asm/thread_info.h +++ b/arch/ia64/include/asm/thread_info.h @@ -84,7 +84,14 @@ struct thread_info { #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR -#define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER)) +#define alloc_task_struct_node(node) \ +({ \ + struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \ + KERNEL_STACK_SIZE_ORDER); \ + struct task_struct *ret = page ? page_address(page) : NULL; \ + \ + ret; +}) #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) #endif /* !__ASSEMBLY */ |
