Date: Thu, 27 Sep 2007 22:39:22 +0200
From: Christoph Hellwig <hch@lst.de>
To: Greg KH <greg@kroah.com>
Cc: jblunck@suse.de, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk,
       hch@lst.de, agruen@suse.de, tiwai@suse.de
Subject: Re: [patch 02/10] Dont touch fs_struct in usermodehelper
Message-ID: <20070927203922.GA15477@lst.de>
References: <20070927141200.820970144@X40.localnet> <20070927141227.559764756@X40.localnet> <20070927174604.GA8339@kroah.com>
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On Thu, Sep 27, 2007 at 10:46:04AM -0700, Greg KH wrote:
> On Thu, Sep 27, 2007 at 04:12:02PM +0200, jblunck@suse.de wrote:
> > This test seems to be unnecessary since we always have rootfs mounted before
> > calling a usermodehelper.
> 
> Are you sure this is true?  I thought we called the usermode helper for
> hotplug _very_ early in the boot sequence when the device tree starts to
> get populated.

rootfs is mounted by init_mount_tree, and curret->fs is set up for init
there aswell.  This is called by mnt_init, which is called by
vfs_caches_init, which is called by start_kernel far before we go to
rest_init which finally creates a thread to call kernel_init which then
calls do_basic_setup which calls do_initcalls to initialize drivers and
afterwards runs the initrd/initramfs.

While the actual function names in main.c changed quite a bit we've
initialized the initial namespace very early on since the 2.5 days.
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