tracing/filters: Don't use pred on alloc failure

[safe/jmp/linux-2.6] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 711468f..9b42695 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -17,7 +17,6 @@
 #include <linux/module.h>
 #include <linux/vmalloc.h>
 #include <linux/completion.h>
-#include <linux/mnt_namespace.h>
 #include <linux/personality.h>
 #include <linux/mempolicy.h>
 #include <linux/sem.h>
@@ -62,6 +61,7 @@
 #include <linux/blkdev.h>
 #include <linux/fs_struct.h>
 #include <linux/magic.h>
+#include <linux/perf_counter.h>
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
@@ -177,7 +177,7 @@ void __init fork_init(unsigned long mempages)
        /* 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, SLAB_PANIC, NULL);
+                       ARCH_MIN_TASKALIGN, SLAB_PANIC | SLAB_NOTRACK, NULL);
 #endif
 
        /* do the arch specific task caches init */
@@ -981,6 +981,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        if (!p)
                goto fork_out;
 
+       ftrace_graph_init_task(p);
+
        rt_mutex_init_task(p);
 
 #ifdef CONFIG_PROVE_LOCKING
@@ -1026,7 +1028,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        p->vfork_done = NULL;
        spin_lock_init(&p->alloc_lock);
 
-       clear_tsk_thread_flag(p, TIF_SIGPENDING);
        init_sigpending(&p->pending);
 
        p->utime = cputime_zero;
@@ -1094,6 +1095,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        /* Perform scheduler related setup. Assign this task to a CPU. */
        sched_fork(p, clone_flags);
 
+       retval = perf_counter_init_task(p);
+       if (retval)
+               goto bad_fork_cleanup_policy;
+
        if ((retval = audit_alloc(p)))
                goto bad_fork_cleanup_policy;
        /* copy all the process information */
@@ -1130,8 +1135,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                }
        }
 
-       ftrace_graph_init_task(p);
-
        p->pid = pid_nr(pid);
        p->tgid = p->pid;
        if (clone_flags & CLONE_THREAD)
@@ -1140,7 +1143,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        if (current->nsproxy != p->nsproxy) {
                retval = ns_cgroup_clone(p, pid);
                if (retval)
-                       goto bad_fork_free_graph;
+                       goto bad_fork_free_pid;
        }
 
        p->set_child_tid = (clone_flags & CLONE_CHILD_SETTID) ? child_tidptr : NULL;
@@ -1232,7 +1235,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                spin_unlock(&current->sighand->siglock);
                write_unlock_irq(&tasklist_lock);
                retval = -ERESTARTNOINTR;
-               goto bad_fork_free_graph;
+               goto bad_fork_free_pid;
        }
 
        if (clone_flags & CLONE_THREAD) {
@@ -1267,8 +1270,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        cgroup_post_fork(p);
        return p;
 
-bad_fork_free_graph:
-       ftrace_graph_exit_task(p);
 bad_fork_free_pid:
        if (pid != &init_struct_pid)
                free_pid(pid);
@@ -1292,6 +1293,7 @@ bad_fork_cleanup_semundo:
 bad_fork_cleanup_audit:
        audit_free(p);
 bad_fork_cleanup_policy:
+       perf_counter_free_task(p);
 #ifdef CONFIG_NUMA
        mpol_put(p->mempolicy);
 bad_fork_cleanup_cgroup:
@@ -1407,8 +1409,11 @@ long do_fork(unsigned long clone_flags,
                        init_completion(&vfork);
                }
 
+               if (!(clone_flags & CLONE_THREAD))
+                       perf_counter_fork(p);
+
                audit_finish_fork(p);
-               tracehook_report_clone(trace, regs, clone_flags, nr, p);
+               tracehook_report_clone(regs, clone_flags, nr, p);
 
                /*
                 * We set PF_STARTING at creation in case tracing wants to
@@ -1460,20 +1465,20 @@ void __init proc_caches_init(void)
 {
        sighand_cachep = kmem_cache_create("sighand_cache",
                        sizeof(struct sighand_struct), 0,
-                       SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_DESTROY_BY_RCU,
-                       sighand_ctor);
+                       SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_DESTROY_BY_RCU|
+                       SLAB_NOTRACK, sighand_ctor);
        signal_cachep = kmem_cache_create("signal_cache",
                        sizeof(struct signal_struct), 0,
-                       SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
+                       SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK, NULL);
        files_cachep = kmem_cache_create("files_cache",
                        sizeof(struct files_struct), 0,
-                       SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
+                       SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK, NULL);
        fs_cachep = kmem_cache_create("fs_cache",
                        sizeof(struct fs_struct), 0,
-                       SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
+                       SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK, NULL);
        mm_cachep = kmem_cache_create("mm_struct",
                        sizeof(struct mm_struct), ARCH_MIN_MMSTRUCT_ALIGN,
-                       SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
+                       SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK, NULL);
        vm_area_cachep = KMEM_CACHE(vm_area_struct, SLAB_PANIC);
        mmap_init();
 }