kernel_optimize_test/arch/sh/kernel/process.c
Eric Dumazet b6a84016bd mm: NUMA aware alloc_thread_info_node()
Add a node parameter to alloc_thread_info(), and change its name to
alloc_thread_info_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>
2011-03-22 17:44:01 -07:00

104 lines
2.3 KiB
C

#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sched.h>
struct kmem_cache *task_xstate_cachep = NULL;
unsigned int xstate_size;
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
*dst = *src;
if (src->thread.xstate) {
dst->thread.xstate = kmem_cache_alloc(task_xstate_cachep,
GFP_KERNEL);
if (!dst->thread.xstate)
return -ENOMEM;
memcpy(dst->thread.xstate, src->thread.xstate, xstate_size);
}
return 0;
}
void free_thread_xstate(struct task_struct *tsk)
{
if (tsk->thread.xstate) {
kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
tsk->thread.xstate = NULL;
}
}
#if THREAD_SHIFT < PAGE_SHIFT
static struct kmem_cache *thread_info_cache;
struct thread_info *alloc_thread_info(struct task_struct *tsk, int node)
{
struct thread_info *ti;
#ifdef CONFIG_DEBUG_STACK_USAGE
gfp_t mask = GFP_KERNEL | __GFP_ZERO;
#else
gfp_t mask = GFP_KERNEL;
#endif
ti = kmem_cache_alloc_node(thread_info_cache, mask, node);
return ti;
}
void free_thread_info(struct thread_info *ti)
{
free_thread_xstate(ti->task);
kmem_cache_free(thread_info_cache, ti);
}
void thread_info_cache_init(void)
{
thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,
THREAD_SIZE, SLAB_PANIC, NULL);
}
#else
struct thread_info *alloc_thread_info(struct task_struct *tsk)
{
#ifdef CONFIG_DEBUG_STACK_USAGE
gfp_t mask = GFP_KERNEL | __GFP_ZERO;
#else
gfp_t mask = GFP_KERNEL;
#endif
struct page *page = alloc_pages_node(node, mask, THREAD_SIZE_ORDER);
return page ? page_address(page) : NULL;
}
void free_thread_info(struct thread_info *ti)
{
free_thread_xstate(ti->task);
free_pages((unsigned long)ti, THREAD_SIZE_ORDER);
}
#endif /* THREAD_SHIFT < PAGE_SHIFT */
void arch_task_cache_init(void)
{
if (!xstate_size)
return;
task_xstate_cachep = kmem_cache_create("task_xstate", xstate_size,
__alignof__(union thread_xstate),
SLAB_PANIC | SLAB_NOTRACK, NULL);
}
#ifdef CONFIG_SH_FPU_EMU
# define HAVE_SOFTFP 1
#else
# define HAVE_SOFTFP 0
#endif
void __cpuinit init_thread_xstate(void)
{
if (boot_cpu_data.flags & CPU_HAS_FPU)
xstate_size = sizeof(struct sh_fpu_hard_struct);
else if (HAVE_SOFTFP)
xstate_size = sizeof(struct sh_fpu_soft_struct);
else
xstate_size = 0;
}