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oom: dump_tasks use find_lock_task_mm too fix 

When find_lock_task_mm() returns a thread other than p in dump_tasks(),
its name should be displayed instead.  This is the thread that will be
targeted by the oom killer, not its mm-less parent.

This also allows us to safely dereference task->comm without needing
get_task_comm().

While we're here, remove the cast on task_cpu(task) as Andrew suggested.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Rientjes 2010-08-09 17:18:47 -07:00 committed by Linus Torvalds
parent 74ab7f1d3f
commit c81fac5cb8
1 changed files with 2 additions and 2 deletions
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4
mm/oom_kill.c
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@ -357,10 +357,10 @@ static void dump_tasks(const struct mem_cgroup *mem)
continue;
}
printk(KERN_INFO "[%5d] %5d %5d %8lu %8lu %3d %3d %s\n",
printk(KERN_INFO "[%5d] %5d %5d %8lu %8lu %3u %3d %s\n",
task->pid, __task_cred(task)->uid, task->tgid,
task->mm->total_vm, get_mm_rss(task->mm),
(int)task_cpu(task), task->signal->oom_adj, p->comm);
task_cpu(task), task->signal->oom_adj, task->comm);
task_unlock(task);
}
}