(2011/05/12 9:52), KAMEZAWA Hiroyuki wrote:
On Tue, 10 May 2011 17:15:01 +0900 (JST)
KOSAKI Motohiro<kosaki.motohiro@xxxxxxxxxxxxxx> wrote:
This patch introduces do_each_thread_reverse() and
select_bad_process() uses it. The benefits are two,
1) oom-killer can kill younger process than older if
they have a same oom score. Usually younger process
is less important. 2) younger task often have PF_EXITING
because shell script makes a lot of short lived processes.
Reverse order search can detect it faster.
Reported-by: CAI Qian<caiqian@xxxxxxxxxx>
Signed-off-by: KOSAKI Motohiro<kosaki.motohiro@xxxxxxxxxxxxxx>
IIUC, for_each_thread() can be called under rcu_read_lock() but
for_each_thread_reverse() must be under tasklist_lock.
Could you add some comment ? and prev_task() should use list_entry()
not list_entry_rcu().
Will fix. thanks.
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