linux-kernel - Re: [PATCH 00/33] [RFC] Non disruptive application core dump infrastructure

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Date:	Thu, 03 Jul 2014 18:29:16 +0530
From:	"Suzuki K. Poulose" <suzuki@...ibm.com>
To:	Phillip Susi <psusi@...ntu.com>,
	Janani Venkataraman <jananive@...ux.vnet.ibm.com>,
	Karel Zak <kzak@...hat.com>
CC:	amwang@...hat.com, rdunlap@...otime.net, andi@...stfloor.org,
	aravinda@...ux.vnet.ibm.com, hch@....de, mhiramat@...hat.com,
	jeremy.fitzhardinge@...rix.com, xemul@...allels.com,
	suzuki@...ux.vnet.ibm.com, kosaki.motohiro@...fujitsu.com,
	adobriyan@...il.com, tarundsk@...ux.vnet.ibm.com,
	vapier@...too.org, roland@...k.frob.com, tj@...nel.org,
	ananth@...ux.vnet.ibm.com, gorcunov@...nvz.org, avagin@...nvz.org,
	oleg@...hat.com, eparis@...hat.com, d.hatayama@...fujitsu.com,
	james.hogan@...tec.com, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org, coreutils@....org,
	procps@...elists.org, util-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/33] [RFC] Non disruptive application core dump infrastructure

On 03/24/2014 07:24 PM, Phillip Susi wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On 3/24/2014 5:43 AM, Janani Venkataraman wrote:
>> Gcore attaches to the process using gdb and runs the gdb gcore
>> command and then detaches. In gcore the dump cannot be issued from
>> a signal handler context as fork() is not signal safe and moreover
>> it is disruptive in
> 
> You can fork+exec from a signal handler just fine.
Please go through the bug, and especially the comment below :

https://sourceware.org/bugzilla/show_bug.cgi?id=4737#c12

Cheers
Suzuki

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