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References: <20101214152259.67896960@suzukikp> <AANLkTim3h2EBcEUP19S2Z0CKA7Oe3k5pB=4LjXsOR3F9@mail.gmail.com>
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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 14 Dec 2010 08:19:56 -0800
Message-ID: <AANLkTi=wBLRLpGw+DUHTNwdFPOTkkTRwMQ17agVY1UVV@mail.gmail.com>
Subject: Re: [RFC] [Patch 0/21] Non disruptive application core dump infrastructure
To: Tejun Heo <tj@kernel.org>
Cc: "Suzuki K. Poulose" <suzuki@in.ibm.com>, linux-kernel@vger.kernel.org,
        Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>,
        Christoph Hellwig <hch@lst.de>, Masami Hiramatsu <mhiramat@redhat.com>,
        Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
        Daisuke HATAYAMA <d.hatayama@jp.fujitsu.com>,
        Andi Kleen <andi@firstfloor.org>, Roland McGrath <roland@redhat.com>,
        Amerigo Wang <amwang@redhat.com>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
        Oleg Nesterov <oleg@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>
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On Tue, Dec 14, 2010 at 8:03 AM, Tejun Heo <tj@kernel.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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