The patch titled
do_wait() wakeup optimization: shift security_task_wait() from eligible_child() to wait_consider_task()
has been removed from the -mm tree. Its filename was
do_wait-wakeup-optimization-shift-security_task_wait-from-eligible_child-to-wait_consider_task.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: do_wait() wakeup optimization: shift security_task_wait() from eligible_child() to wait_consider_task()
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Preparation, no functional changes.
eligible_child() has a single caller, wait_consider_task(). We can move
security_task_wait() out from eligible_child(), this allows us to use it
for filtered wake_up().
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Acked-by: Roland McGrath <roland@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Ratan Nalumasu <rnalumasu@xxxxxxxxx>
Cc: Vitaly Mayatskikh <vmayatsk@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/exit.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff -puN kernel/exit.c~do_wait-wakeup-optimization-shift-security_task_wait-from-eligible_child-to-wait_consider_task kernel/exit.c
--- a/kernel/exit.c~do_wait-wakeup-optimization-shift-security_task_wait-from-eligible_child-to-wait_consider_task
+++ a/kernel/exit.c
@@ -1112,8 +1112,6 @@ static struct pid *task_pid_type(struct
static int eligible_child(struct wait_opts *wo, struct task_struct *p)
{
- int err;
-
if (wo->wo_type < PIDTYPE_MAX) {
if (task_pid_type(p, wo->wo_type) != wo->wo_pid)
return 0;
@@ -1128,10 +1126,6 @@ static int eligible_child(struct wait_op
&& !(wo->wo_flags & __WALL))
return 0;
- err = security_task_wait(p);
- if (err)
- return err;
-
return 1;
}
@@ -1492,6 +1486,7 @@ static int wait_consider_task(struct wai
if (!ret)
return ret;
+ ret = security_task_wait(p);
if (unlikely(ret < 0)) {
/*
* If we have not yet seen any eligible child,
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
origin.patch
linux-next.patch
do_wait-optimization-do-not-place-sub-threads-on-task_struct-children-list.patch
utrace-core.patch
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