[PATCH v2 0/4] kthread: NUMA aware kthread_create_on_cpu()

Eric Dumazet
2010-11-29T15:13:23Z

Note : compiled and tested on x86_32 and x86_64 only, but these patches
take care of other arches as well.

Cc: linux-arch@vger.kernel.org

Thanks for your feedback Andi !

[PATCH v2 0/4] kthread: NUMA aware kthread_create_on_cpu()

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...

Patch 1/4 mm: NUMA aware alloc_task_struct_node()

alloc_task_struct(void) becomes alloc_task_struct_node(int node)

Patch 2/4 mm: NUMA aware alloc_thread_info_node()

alloc_thread_info(struct task_struct *tsk) becomes
alloc_thread_info_node(struct task_struct *tsk, int node)

Patch 3/4 kthread: NUMA aware kthread_create_on_cpu()

Patch 4/4 kthread: use kthread_create_on_cpu()

ksoftirqd, kworker, migration, and pktgend kthreads can be created with
NUMA aware kthread_create_on_cpu()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tejun Heo <tj@kernel.org>
Cc: linux-arch@vger.kernel.org
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
---
arch/cris/include/asm/thread_info.h | 2 -
arch/frv/include/asm/processor.h | 2 -
arch/frv/include/asm/thread_info.h | 13 ++------
arch/frv/kernel/process.c | 5 ++-
arch/ia64/include/asm/thread_info.h | 14 +++++++--
arch/m32r/include/asm/thread_info.h | 13 ++------
arch/mips/include/asm/thread_info.h | 6 ++--
arch/mn10300/include/asm/thread_info.h | 6 ++--
arch/powerpc/include/asm/thread_info.h | 2 -
arch/powerpc/kernel/process.c | 4 +-
arch/score/include/asm/thread_info.h | 2 -
arch/sh/include/asm/thread_info.h | 2 -
arch/sh/kernel/process.c | 16 ++++++-----
arch/sparc/include/asm/thread_info_32.h | 6 ++--
arch/sparc/include/asm/thread_info_64.h | 24 ++++++++--------
arch/sparc/mm/srmmu.c | 4 +-
arch/sparc/mm/sun4c.c | 4 +-
arch/tile/include/asm/thread_info.h | 2 -
arch/tile/kernel/process.c | 4 +-
arch/um/include/asm/processor-generic.h | 2 -
arch/x86/include/asm/thread_info.h | 10 +++++-
include/linux/kthread.h | 14 ++++++---
include/linux/sched.h | 1
kernel/fork.c | 20 ++++++++-----
kernel/kthread.c | 32 +++++++++++++++++-----
kernel/softirq.c | 3 +-
kernel/stop_machine.c | 4 +-
kernel/workqueue.c | 4 +-
net/core/pktgen.c | 3 +-
29 files changed, 135 insertions(+), 89 deletions(-)