kern/131506: pipes in forked procs sometimes hang under Linux emulation 2.6.16

[Takahiro Kurosawa]

The following reply was made to PR kern/131506; it has been noted by GNATS.

From: Takahiro Kurosawa <takahiro.kurosawa at gmail.com>
To: "Arno J. Klaassen" <arno at heho.snv.jussieu.fr>
Cc: freebsd-bugs at freebsd.org
Subject: Re: kern/131506: pipes in forked procs sometimes hang under Linux 
	emulation 2.6.16
Date: Wed, 18 Feb 2009 00:19:56 +0900

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 It seems that vfork/exec synchronization was changed recently
 but the linux emulation code keeps using the obsolete mechanism.
 
 The attached patch may fix the problem.
 
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