linux-kernel - Re: [patch] pipe: Don't oops when pipe filesystem isn't mounted

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Message-ID: <20061211093314.GC4587@ftp.linux.org.uk>
Date:	Mon, 11 Dec 2006 09:33:15 +0000
From:	Al Viro <viro@....linux.org.uk>
To:	Andrew Morton <akpm@...l.org>
Cc:	Andrew MChuck Ebbert <76306.1226@...puserve.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Linus Torvalds orton <akpm@...l.org>" <torvalds@...l.org>
Subject: Re: [patch] pipe: Don't oops when pipe filesystem isn't mounted

On Mon, Dec 11, 2006 at 01:25:45AM -0800, Andrew Morton wrote:
> On Mon, 11 Dec 2006 09:21:30 +0000
> Al Viro <viro@....linux.org.uk> wrote:
> 
> > On Mon, Dec 11, 2006 at 01:13:27AM -0800, Andrew Morton wrote:
> > > On Mon, 11 Dec 2006 00:55:57 -0800
> > > Andrew Morton <akpm@...l.org> wrote:
> > > 
> > > > I think the bug really is the running of populate_rootfs() before running
> > > > the initcalls, in init/main.c:init().  It's just more sensible to start
> > > > running userspace after the initcalls have been run.  Statically-linked
> > > > drivers which want to load firmware files will lose.  To fix that we'd need
> > > > a new callback.  It could be with a new linker section or perhaps simply a
> > > > notifier chain.
> > > 
> > > hm, actually...  Add two new initcall levels, one for populate_rootfs() and
> > > one for things which want to come after it (ie: drivers which want to
> > > access the filesytem):
> > 
> > IMO we should just call pipe (and socket) initialization directly at
> > the same level as slab, task, dcache, etc.
> 
> spose that would work.  But what other initcall-initialised things are not
> yet available when populate_rootfs() runs?
> 
> <does  grep _initcall */*.c>
> <wonders why anything works at all>

Explain, please...
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