From: Jon Smirl <jonsmirl@yahoo.com>
To: James Simmons <jsimmons@infradead.org>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, keithp@keithp.com
Subject: Re: Is it possible to implement interrupt time printk's reliably?
Date: Mon, 10 May 2004 15:22:11 -0700 (PDT) [thread overview]
Message-ID: <20040510222211.78262.qmail@web14922.mail.yahoo.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0405102253330.8016-100000@phoenix.infradead.org>
So how long is the delay between PCI probe time (when the framebuffer goes
active) and when early user space is up with initrd? Or is initrd up first? If
initrd is up first then early user space mode setting will occur at the same
time that it does currently.
--- James Simmons <jsimmons@infradead.org> wrote:
>
> > So how do printk's work in the very early boot? Is the video card active
> before
> > the kernel probes it's module, or are these very early printk's being queued
> > until the video driver is probed?
>
> printk messages are stored in log_buf in printk.c. The console driver just
> reads the buffer and displays what is in the buffer. Look at printk.c
> carefully.
>
>
>
=====
Jon Smirl
jonsmirl@yahoo.com
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next prev parent reply other threads:[~2004-05-10 22:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-07 2:52 Jon Smirl
2004-05-07 5:17 ` Andrew Morton
2004-05-07 13:34 ` Jon Smirl
2004-05-07 19:13 ` Andrew Morton
2004-05-07 19:26 ` Jon Smirl
2004-05-07 20:01 ` Andrew Morton
2004-05-09 16:33 ` Jon Smirl
2004-05-10 21:55 ` James Simmons
2004-05-10 22:22 ` Jon Smirl [this message]
2004-05-11 0:23 ` James Simmons
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