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From: "David S. Miller" <davem@davemloft.net>
To: mingo@redhat.com
Cc: linux-kernel@vger.kernel.org
Subject: softlockup interaction with slow consoles
Date: Mon, 20 Feb 2006 13:18:47 -0800 (PST)	[thread overview]
Message-ID: <20060220.131847.25386315.davem@davemloft.net> (raw)


When register_console() runs, it dumps the entire log buffer
to the console device with interrupts off.

If you're going over a slow console, this can easily take more
than 10 seconds especially on SMP with many cpus brought up.

This makes the softlock fire, which is terribly annoying :-)

I think the bug is in the console registry code, I think it
should capture chunks of the existing console buffer into some
local memory and push things piece by piece with interrupts
enabled to the console driver(s).

Any better ideas?

             reply	other threads:[~2006-02-20 21:18 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-02-20 21:18 David S. Miller [this message]
2006-02-21  9:09 ` Ingo Molnar
2006-02-21  9:16   ` David S. Miller
2006-02-21 13:49     ` Andi Kleen
2006-02-21 20:01       ` David S. Miller
2006-02-21 20:05         ` Andi Kleen
2006-02-21 20:19           ` David S. Miller
2006-02-21 20:27             ` Dave Jones
2006-02-21 20:50               ` David S. Miller
2006-02-21 20:43             ` Andi Kleen
2006-02-21 19:23     ` Matt Mackall
2006-02-21 19:58       ` David S. Miller

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