linux-kernel - Re: [PATCH] coredump_filter: enable to change the default filter

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Message-Id: <20081226153931.5CBB.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Fri, 26 Dec 2008 15:49:50 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>
Cc:	kosaki.motohiro@...fujitsu.com, Roland McGrath <roland@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, yumiko.sugita.yf@...achi.com,
	satoshi.oshima.fk@...achi.com
Subject: Re: [PATCH] coredump_filter: enable to change the default filter

> >>However, we would need a special care for PID namespace if we use
> >>init's coredump_filter as default.  For a process with new PID
> >>namespace and new /proc, writing to /proc/1/coredump_filter doesn't
> >>mean changing default, although it's not a usual operation.
> > 
> > I'd figured that private PID namespaces with their own init would want
> > their own private settings for this default too.
> 
> Probably it's true, but I'm not sure if having coredump_filter have
> two means is acceptable.  init in a private PID namespace can die
> and dump a core file.  So its coredump_filter has two means; default
> setting for the namespace and setting for itself.  

FWIW, I think private namespace should have private settings framework.
I don't like to make special private settings code in this patch.

Yeah, defenitely we need to private settings for various reason, I agreed.
but we also need consistent private settings rule and framework.
otherwise, we will make various non consistent crap. maybe..



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