From: Jeff Dike <jdike@addtoit.com>
To: Blaisorblade <blaisorblade@yahoo.it>
Cc: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] [patch 094/241] uml: fix error output during early boot
Date: Sat, 10 Feb 2007 17:21:57 -0500 [thread overview]
Message-ID: <20070210222157.GA3750@ccure.user-mode-linux.org> (raw)
In-Reply-To: <200702101331.20261.blaisorblade@yahoo.it>
On Sat, Feb 10, 2007 at 01:31:20PM +0100, Blaisorblade wrote:
> libc's printf has an enormous stack usage, so that my_printf is used for
> direct output instead of printf; if this is ok because it's bootup
> code,
It is bootup code only.
> then *fatal* should be marked as "bootup code only";
OK.
> otherwise
> we may reuse vsprintf() and write() or fputs(); this should match
> what happens in my_printf, to avoid any unlikely problem with libc's
> buffering.
Offhand, I would say that if we are on a kernel stack, printk is safe
to use, and should be used, so there's no need for things like
my_printf. Maybe there are some exceptions in early boot when the
kernel is running, but before the console is working, but I can't
think of any problems we've had like that.
Jeff
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Work email - jdike at linux dot intel dot com
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next prev parent reply other threads:[~2007-02-10 22:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200702100944.l1A9iSEp008813@shell0.pdx.osdl.net>
2007-02-10 12:31 ` [uml-devel] [patch 094/241] uml: fix error output during early boot Blaisorblade
2007-02-10 22:21 ` Jeff Dike [this message]
2007-02-12 18:59 ` Blaisorblade
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