Re: [PATCH 1/3] printk: Release console_sem after logbuf_lock

From: Peter Zijlstra
Date: Fri Jun 10 2011 - 07:29:01 EST


On Thu, 2011-06-09 at 16:57 -0700, Hugh Dickins wrote:
>
> All console-related activity curently happens under spin_lock_irqsave(&console_lock).
> This causes interrutps to be blocked for 1-2 milliseconds with vgacon, and for
> hundreds of milliseconds with fbdevs. This results in network overruns, audio
> dropouts, dropped characters on serial ports and other such nice things.

Hmm, with these proposed patches we're actually back to that. I wonder
if fbdev is still that crappy..
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