linux-kernel - Re: Runaway loop with the current git.

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Message-ID: <20081205212428.GB8075@ioremap.net>
Date:	Sat, 6 Dec 2008 00:24:28 +0300
From:	Evgeniy Polyakov <zbr@...emap.net>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org
Subject: Re: Runaway loop with the current git.

On Fri, Dec 05, 2008 at 10:17:01PM +0100, Kay Sievers (kay.sievers@...y.org) wrote:
> > And what's with tty drivers? If kernel freezes there even if suddenly
> > faulty userspace started to load them, where this can happen? Apparently
> > it is not sleeping userspace since console does not respond to input.
> 
> 5-1 dev_t request looks like something in initramfs accesses
> /dev/console, but the driver for it is not properly
> initialized/registered that time, and the kernel module loader tries
> to load a module? The forked process might also try to access
> /dev/console again, and hence the loop?

But why system freezes? Is this init linking/__init calling order
changes? I have all tty/8250 compiled in btw.

$ egrep -i "console|tty|8250" /tmp/.config 
# CONFIG_NETFILTER_XT_MATCH_PKTTYPE is not set
CONFIG_NETCONSOLE=m
# CONFIG_NETCONSOLE_DYNAMIC is not set
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_NR_UARTS=16
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set
# Non-8250 serial port support
CONFIG_SERIAL_CORE_CONSOLE=y
# Console display driver support
CONFIG_VGA_CONSOLE=y
CONFIG_DUMMY_CONSOLE=y

-- 
	Evgeniy Polyakov
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