From: Jiri Slaby <jslaby@suse.cz>
To: Alan Cox <alan@linux.intel.com>
Cc: gregkh@suse.de, jirislaby@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] serial: 8250, increase PASS_LIMIT
Date: Mon, 06 Jun 2011 15:49:25 +0200 [thread overview]
Message-ID: <4DECDAE5.3080006@suse.cz> (raw)
In-Reply-To: <20110606130945.7ad9edef@bob.linux.org.uk>
On 06/06/2011 02:09 PM, Alan Cox wrote:
> On Sun, 5 Jun 2011 22:51:49 +0200
> Jiri Slaby <jslaby@suse.cz> wrote:
>
>> From: Jiri Slaby <jirislaby@gmail.com>
>>
>> With virtual machines like qemu, it's pretty common to see "too much
>> work for irq4" messages nowadays. This happens when a bunch of output
>> is printed on the emulated serial console. This is caused by too low
>> PASS_LIMIT. When ISR loops more than the limit, it spits the message.
>>
>> I've been using a kernel with doubled the limit and I couldn't see no
>> problems. Maybe it's time to get rid of the message now?
>
> We need a limit to deal with hangs caused by misconfiguration /
> mis-detection on ISA ports in particular but we can certainly bump the
> limit to handle poor emulations.
Yeah, I meant it that way (get rid of the message by bumping the limit
-- this patch).
thanks,
--
js
suse labs
prev parent reply other threads:[~2011-06-06 13:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-05 20:51 [PATCH] serial: 8250, increase PASS_LIMIT Jiri Slaby
2011-06-06 12:09 ` Alan Cox
2011-06-06 13:49 ` Jiri Slaby [this message]
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