From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, efault@gmx.de,
Arne Jansen <lists@die-jansens.de>
Subject: Re: [PATCH 1/3] printk: Release console_sem after logbuf_lock
Date: Fri, 10 Jun 2011 13:28:31 +0200 [thread overview]
Message-ID: <1307705311.3941.118.camel@twins> (raw)
In-Reply-To: <alpine.LSU.2.00.1106091655560.2710@sister.anvils>
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..
next prev parent reply other threads:[~2011-06-10 11:28 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-09 13:06 [PATCH 0/3] printk: Remove lockdep_off() and wakeups Peter Zijlstra
2011-06-09 13:06 ` [PATCH 1/3] printk: Release console_sem after logbuf_lock Peter Zijlstra
2011-06-09 20:06 ` Andrew Morton
2011-06-09 20:27 ` Ingo Molnar
2011-06-09 20:54 ` Peter Zijlstra
2011-06-09 21:07 ` Andrew Morton
2011-06-09 23:57 ` Hugh Dickins
2011-06-10 0:08 ` Andrew Morton
2011-06-10 9:33 ` Ingo Molnar
2011-06-10 9:40 ` Peter Zijlstra
2011-06-10 9:42 ` Peter Zijlstra
2011-06-10 11:28 ` Peter Zijlstra [this message]
2011-06-10 12:30 ` Peter Zijlstra
2011-06-10 12:34 ` Ingo Molnar
2011-06-10 12:41 ` Peter Zijlstra
2011-06-10 12:42 ` Peter Zijlstra
2011-06-23 19:03 ` Pavel Machek
2011-06-10 9:30 ` Ingo Molnar
2011-06-10 10:15 ` Peter Zijlstra
2011-06-09 13:06 ` [PATCH 2/3] printk, lockdep: Remove lockdep_off() usage Peter Zijlstra
2011-06-10 13:23 ` Peter Zijlstra
2011-06-09 13:06 ` [PATCH 3/3] printk: Avoid all wakeups from printk Peter Zijlstra
2011-06-09 13:32 ` Ingo Molnar
2011-06-09 13:40 ` Peter Zijlstra
2011-06-09 13:55 ` Ingo Molnar
2011-06-09 14:06 ` Peter Zijlstra
2011-06-09 14:19 ` Ingo Molnar
2011-06-09 14:23 ` Peter Zijlstra
2011-06-09 15:47 ` Linus Torvalds
2011-06-09 15:51 ` Ingo Molnar
2011-06-09 16:25 ` Peter Zijlstra
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