From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ftp.linux.org.uk>
Date: Mon, 27 Aug 2007 19:35:10 +0000
Subject: Re: [PATCH 1/4] export __put_task_struct for XPMEM
Message-Id: <20070827193510.GJ21089@ftp.linux.org.uk>
List-Id: <linux-ia64.vger.kernel.org>
References: <20070827155622.GA25589@sgi.com> <20070827155933.GB25589@sgi.com> <20070827161327.GG21089@ftp.linux.org.uk> <20070827181056.GA30176@sgi.com> <20070827181544.GH21089@ftp.linux.org.uk> <20070827191906.GB30176@sgi.com>
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To: Dean Nelson <dcn@sgi.com>
Cc: akpm@linux-foundation.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, tony.luck@intel.com, jes@sgi.com

On Mon, Aug 27, 2007 at 02:19:06PM -0500, Dean Nelson wrote:

> No operations can be done once it's closed, only while it's opened.

What the hell do you mean, can't be done?

	fd = open(...);
	fp = popen("/bin/date", "r");
	/* read from fp */
	fclose(fp);
	do operations on fd

And you've got yourself
	open
	fork duplicating descriptor
	exit closing that duplicate
	IO on original, after call of flush