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Message-Id: <1190412335.32660.55.camel@localhost>
Date: Fri, 21 Sep 2007 15:05:34 -0700
From: Joe Perches <joe@...ches.com>
To: Kyle Moffett <mrmacman_g4@....com>
Cc: Rob Landley <rob@...dley.net>, Indan Zupancic <indan@....nu>,
linux-tiny@...enic.com,
Michael Opdenacker <michael@...e-electrons.com>,
CE Linux Developers List <celinux-dev@...e.celinuxforum.org>,
linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: [Announce] Linux-tiny project revival
On Fri, 2007-09-21 at 17:34 -0400, Kyle Moffett wrote:
> With a bit more glue that would cause GCC to notice that for a given
> qprintk_kmalloc the "qpk->type" is always zero because the level is
> too high, and therefore it would optimize out *ALL* of the
> _qprintk_kmalloc(), _qprintk(), and _qprintk_finish() calls.
A negative is that lockup conditions swallow partial messages.
Another approach that doesn't require any new buffering is:
id = printk_block_start();
printk_block(id, fmt, ...)
printk_block_end(id)
and have print_block output the id when multiple IDs are
concurrently issued.
This requires a trivial tool to post-process the log
when messages are interleaved.
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