add addaptive_pointer's target to task_struct.
Now, this is used by /proc/<pid> readdir() routine.
When release_task() is called, call_invalidate_ap() is invoked and
pointers are invalidated and registerred callback is called.
Signed-Off-By: KAMEZAWA Hiroyuki <[email protected]>
include/linux/init_task.h | 1 +
include/linux/sched.h | 4 +++-
kernel/exit.c | 4 ++++
kernel/fork.c | 2 ++
4 files changed, 10 insertions(+), 1 deletion(-)
Index: linux-2.6.18-rc4/include/linux/sched.h
===================================================================
--- linux-2.6.18-rc4.orig/include/linux/sched.h
+++ linux-2.6.18-rc4/include/linux/sched.h
@@ -80,6 +80,7 @@ struct sched_param {
#include <linux/resource.h>
#include <linux/timer.h>
#include <linux/hrtimer.h>
+#include <linux/adaptive_pointer.h>
#include <asm/processor.h>
@@ -988,7 +989,8 @@ struct task_struct {
atomic_t fs_excl; /* holding fs exclusive resources */
struct rcu_head rcu;
-
+ /* used by /proc/<pid> */
+ struct adaptive_pointer ap_target;
/*
* cache last used pipe for splice
*/
Index: linux-2.6.18-rc4/kernel/fork.c
===================================================================
--- linux-2.6.18-rc4.orig/kernel/fork.c
+++ linux-2.6.18-rc4/kernel/fork.c
@@ -1154,6 +1154,7 @@ static struct task_struct *copy_process(
INIT_LIST_HEAD(&p->thread_group);
INIT_LIST_HEAD(&p->ptrace_children);
INIT_LIST_HEAD(&p->ptrace_list);
+ init_adaptive_pointer(&p->ap_target);
/* Perform scheduler related setup. Assign this task to a CPU. */
sched_fork(p, clone_flags);
@@ -1241,6 +1242,7 @@ static struct task_struct *copy_process(
__get_cpu_var(process_counts)++;
}
attach_pid(p, PIDTYPE_PID, p->pid);
+ ap_alive(&p->ap_target);
nr_threads++;
}
Index: linux-2.6.18-rc4/include/linux/init_task.h
===================================================================
--- linux-2.6.18-rc4.orig/include/linux/init_task.h
+++ linux-2.6.18-rc4/include/linux/init_task.h
@@ -128,6 +128,7 @@ extern struct group_info init_groups;
.pi_lock = SPIN_LOCK_UNLOCKED, \
INIT_TRACE_IRQFLAGS \
INIT_LOCKDEP \
+ .ap_target = ADAPTIVE_POINTER_INIT(tsk.ap_target), \
}
Index: linux-2.6.18-rc4/kernel/exit.c
===================================================================
--- linux-2.6.18-rc4.orig/kernel/exit.c
+++ linux-2.6.18-rc4/kernel/exit.c
@@ -38,6 +38,7 @@
#include <linux/pipe_fs_i.h>
#include <linux/audit.h> /* for audit_free() */
#include <linux/resource.h>
+#include <linux/adaptive_pointer.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
@@ -143,6 +144,9 @@ repeat:
write_lock_irq(&tasklist_lock);
ptrace_unlink(p);
BUG_ON(!list_empty(&p->ptrace_list) || !list_empty(&p->ptrace_children));
+
+ /* invalidate adaptive pointer to this task */
+ call_invalidate_ap(&p->ap_target);
__exit_signal(p);
/*
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
