linux-kernel - Re: [RFC] [Patch 0/21] Non disruptive application core dump infrastructure

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Message-ID: <AANLkTi=wBLRLpGw+DUHTNwdFPOTkkTRwMQ17agVY1UVV@mail.gmail.com>
Date:	Tue, 14 Dec 2010 08:19:56 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	"Suzuki K. Poulose" <suzuki@...ibm.com>,
	linux-kernel@...r.kernel.org,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Christoph Hellwig <hch@....de>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Daisuke HATAYAMA <d.hatayama@...fujitsu.com>,
	Andi Kleen <andi@...stfloor.org>,
	Roland McGrath <roland@...hat.com>,
	Amerigo Wang <amwang@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC] [Patch 0/21] Non disruptive application core dump infrastructure

On Tue, Dec 14, 2010 at 8:03 AM, Tejun Heo <tj@...nel.org> wrote:
>
> I think a better way would be adding a ptrace attach which is nestable
> and doesn't have the nasty side effect caused by the interactions
> between the implicit SIGSTOP and group stop.

Don't we already nest at least to some degree? At least you can strace
a gdb session or another strace, no?

                Linus
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