#include <linux/completion.h>
#include <linux/namespace.h>
#include <linux/personality.h>
+#include <linux/mempolicy.h>
#include <linux/sem.h>
#include <linux/file.h>
#include <linux/binfmts.h>
#include <linux/mman.h>
#include <linux/fs.h>
+#include <linux/cpu.h>
#include <linux/security.h>
#include <linux/syscalls.h>
#include <linux/jiffies.h>
#include <linux/ptrace.h>
#include <linux/mount.h>
#include <linux/audit.h>
+#include <linux/rmap.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
int cpu;
int total = 0;
- for_each_cpu(cpu)
+ for_each_online_cpu(cpu)
total += per_cpu(process_counts, cpu);
return total;
EXPORT_SYMBOL(finish_wait);
-int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync)
+int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key)
{
- int ret = default_wake_function(wait, mode, sync);
+ int ret = default_wake_function(wait, mode, sync, key);
if (ret)
list_del_init(&wait->task_list);
#endif
/* create a slab on which task_structs can be allocated */
task_struct_cachep =
- kmem_cache_create("task_struct",
- sizeof(struct task_struct),ARCH_MIN_TASKALIGN,
- 0, NULL, NULL);
- if (!task_struct_cachep)
- panic("fork_init(): cannot create task_struct SLAB cache");
+ kmem_cache_create("task_struct", sizeof(struct task_struct),
+ ARCH_MIN_TASKALIGN, SLAB_PANIC, NULL, NULL);
#endif
/*
struct rb_node **rb_link, *rb_parent;
int retval;
unsigned long charge = 0;
+ struct mempolicy *pol;
down_write(&oldmm->mmap_sem);
flush_cache_mm(current->mm);
if (!tmp)
goto fail_nomem;
*tmp = *mpnt;
+ pol = mpol_copy(vma_policy(mpnt));
+ retval = PTR_ERR(pol);
+ if (IS_ERR(pol))
+ goto fail_nomem_policy;
+ vma_set_policy(tmp, pol);
tmp->vm_flags &= ~VM_LOCKED;
tmp->vm_mm = mm;
tmp->vm_next = NULL;
+ anon_vma_link(tmp);
+ vma_prio_tree_init(tmp);
file = tmp->vm_file;
- INIT_LIST_HEAD(&tmp->shared);
if (file) {
struct inode *inode = file->f_dentry->d_inode;
get_file(file);
atomic_dec(&inode->i_writecount);
/* insert tmp into the share list, just after mpnt */
- down(&file->f_mapping->i_shared_sem);
- list_add(&tmp->shared, &mpnt->shared);
- up(&file->f_mapping->i_shared_sem);
+ spin_lock(&file->f_mapping->i_mmap_lock);
+ flush_dcache_mmap_lock(file->f_mapping);
+ vma_prio_tree_add(tmp, mpnt);
+ flush_dcache_mmap_unlock(file->f_mapping);
+ spin_unlock(&file->f_mapping->i_mmap_lock);
}
/*
flush_tlb_mm(current->mm);
up_write(&oldmm->mmap_sem);
return retval;
+fail_nomem_policy:
+ kmem_cache_free(vm_area_cachep, tmp);
fail_nomem:
retval = -ENOMEM;
fail:
if (likely(!mm_alloc_pgd(mm))) {
mm->def_flags = 0;
+#ifdef __HAVE_ARCH_MMAP_TOP
+ mm->mmap_top = mmap_top();
+#endif
return mm;
}
free_mm(mm);
mm = allocate_mm();
if (mm) {
memset(mm, 0, sizeof(*mm));
- return mm_init(mm);
+ mm = mm_init(mm);
}
- return NULL;
+ return mm;
}
/*
p = dup_task_struct(current);
if (!p)
goto fork_out;
+ p->tux_info = NULL;
retval = -EAGAIN;
if (atomic_read(&p->user->processes) >=
p->security = NULL;
p->io_context = NULL;
p->audit_context = NULL;
+#ifdef CONFIG_NUMA
+ p->mempolicy = mpol_copy(p->mempolicy);
+ if (IS_ERR(p->mempolicy)) {
+ retval = PTR_ERR(p->mempolicy);
+ p->mempolicy = NULL;
+ goto bad_fork_cleanup;
+ }
+#endif
retval = -ENOMEM;
if ((retval = security_task_alloc(p)))
- goto bad_fork_cleanup;
+ goto bad_fork_cleanup_policy;
if ((retval = audit_alloc(p)))
goto bad_fork_cleanup_security;
/* copy all the process information */
audit_free(p);
bad_fork_cleanup_security:
security_task_free(p);
+bad_fork_cleanup_policy:
+#ifdef CONFIG_NUMA
+ mpol_free(p->mempolicy);
+#endif
bad_fork_cleanup:
if (p->pid > 0)
free_pidmap(p->pid);
set_tsk_thread_flag(p, TIF_SIGPENDING);
}
- if (!(clone_flags & CLONE_STOPPED))
- wake_up_forked_process(p); /* do this last */
- else
+ if (!(clone_flags & CLONE_STOPPED)) {
+ /*
+ * Do the wakeup last. On SMP we treat fork() and
+ * CLONE_VM separately, because fork() has already
+ * created cache footprint on this CPU (due to
+ * copying the pagetables), hence migration would
+ * probably be costy. Threads on the other hand
+ * have less traction to the current CPU, and if
+ * there's an imbalance then the scheduler can
+ * migrate this fresh thread now, before it
+ * accumulates a larger cache footprint:
+ */
+ if (clone_flags & CLONE_VM)
+ wake_up_forked_thread(p);
+ else
+ wake_up_forked_process(p);
+ } else {
+ int cpu = get_cpu();
+
p->state = TASK_STOPPED;
+ if (cpu_is_offline(task_cpu(p)))
+ set_task_cpu(p, cpu);
+
+ put_cpu();
+ }
++total_forks;
if (unlikely (trace)) {
{
sighand_cachep = kmem_cache_create("sighand_cache",
sizeof(struct sighand_struct), 0,
- SLAB_HWCACHE_ALIGN, NULL, NULL);
- if (!sighand_cachep)
- panic("Cannot create sighand SLAB cache");
-
+ SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
signal_cachep = kmem_cache_create("signal_cache",
sizeof(struct signal_struct), 0,
- SLAB_HWCACHE_ALIGN, NULL, NULL);
- if (!signal_cachep)
- panic("Cannot create signal SLAB cache");
-
+ SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
files_cachep = kmem_cache_create("files_cache",
- sizeof(struct files_struct), 0,
- SLAB_HWCACHE_ALIGN, NULL, NULL);
- if (!files_cachep)
- panic("Cannot create files SLAB cache");
-
+ sizeof(struct files_struct), 0,
+ SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
fs_cachep = kmem_cache_create("fs_cache",
- sizeof(struct fs_struct), 0,
- SLAB_HWCACHE_ALIGN, NULL, NULL);
- if (!fs_cachep)
- panic("Cannot create fs_struct SLAB cache");
-
+ sizeof(struct fs_struct), 0,
+ SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
vm_area_cachep = kmem_cache_create("vm_area_struct",
sizeof(struct vm_area_struct), 0,
- 0, NULL, NULL);
- if(!vm_area_cachep)
- panic("vma_init: Cannot alloc vm_area_struct SLAB cache");
-
+ SLAB_PANIC, NULL, NULL);
mm_cachep = kmem_cache_create("mm_struct",
sizeof(struct mm_struct), 0,
- SLAB_HWCACHE_ALIGN, NULL, NULL);
- if(!mm_cachep)
- panic("vma_init: Cannot alloc mm_struct SLAB cache");
+ SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
}
git://git.onelab.eu / linux-2.6.git / blobdiff