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

Peter Zijlstra
2011-06-10T11:28:56Z

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..