From: Oleg Nesterov <oleg@tv-sign.ru>
To: paulmck@us.ibm.com
Cc: Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org, Roland McGrath <roland@redhat.com>,
Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH 2/2] fix kill_proc_info() vs fork() theoretical race
Date: Sat, 18 Feb 2006 21:19:36 +0300 [thread overview]
Message-ID: <43F76538.16BBA317@tv-sign.ru> (raw)
In-Reply-To: 20060218020659.GH1291@us.ibm.com
"Paul E. McKenney" wrote:
>
> On Fri, Feb 17, 2006 at 12:20:08AM +0300, Oleg Nesterov wrote:
> > "Paul E. McKenney" wrote:
> > >
> > > The other thing to think through is tkill on a thread/process while it
> > > is being created. I believe that this is OK, since thread-specific
> > > kill must target a specific thread, so does not do the traversal.
> >
> > Also, tkill was not converted to use rcu_read_lock yet, it still
> > takes tasklist_lock, so I think it is safe.
>
> I suspect that tkill will eventually need to avoid tasklist_lock... ;-)
Ok, I am sending a couple of preparation patches for this.
Paul, I didn't beleive you when you started this work. Now I think
we can avoid tasklist AND cleanup the code in many places. I am glad
I was wrong.
Btw,
>
> firing off some steamroller tests on it.
Could you point me to these tests?
Oleg.
next prev parent reply other threads:[~2006-02-18 17:01 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-06 16:45 [PATCH] fix kill_proc_info() vs copy_process() race Oleg Nesterov
2006-02-06 17:10 ` Oleg Nesterov
2006-02-06 20:25 ` Oleg Nesterov
2006-02-14 22:32 ` Paul E. McKenney
2006-02-15 14:05 ` Oleg Nesterov
2006-02-15 19:13 ` [PATCH 1/2] fix kill_proc_info() vs CLONE_THREAD race Oleg Nesterov
2006-02-16 19:19 ` Paul E. McKenney
2006-02-16 21:16 ` Oleg Nesterov
2006-02-15 19:13 ` [PATCH 2/2] fix kill_proc_info() vs fork() theoretical race Oleg Nesterov
2006-02-16 19:26 ` Paul E. McKenney
2006-02-16 20:56 ` Oleg Nesterov
2006-02-16 19:53 ` Paul E. McKenney
2006-02-16 21:20 ` Oleg Nesterov
2006-02-18 2:06 ` Paul E. McKenney
2006-02-18 18:19 ` Oleg Nesterov [this message]
2006-02-20 17:49 ` Paul E. McKenney
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