Date: Wed, 15 Dec 2010 12:51:54 +0100
From: Andi Kleen <andi@firstfloor.org>
To: "Suzuki K. Poulose" <suzuki@in.ibm.com>
Cc: Tejun Heo <tj@kernel.org>, Linus Torvalds <torvalds@linux-foundation.org>,
        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>
Subject: Re: [RFC] [Patch 0/21] Non disruptive application core dump
 infrastructure
Message-ID: <20101215115153.GB22304@basil.fritz.box>
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> 1) A process can trigger a core synchronously, upon an event, say a signal 
> handler and continue from there. gcore would require a fork(), which is not 
> safe to use from a signal handler.

Why is it not safe for a signal?

>From the kernel side it should be. glibc may do some funky things
on fork, but you could always call the syscall directly.

-Andi
-- 
ak@linux.intel.com -- Speaking for myself only.
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