From: Alan Cox <alan@linux.intel.com>
To: Jiri Slaby <jslaby@suse.cz>
Cc: gregkh@suse.de, jirislaby@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] serial: 8250, increase PASS_LIMIT
Date: Mon, 6 Jun 2011 13:09:45 +0100 [thread overview]
Message-ID: <20110606130945.7ad9edef@bob.linux.org.uk> (raw)
In-Reply-To: <1307307109-27776-1-git-send-email-jslaby@suse.cz>
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.
next prev parent reply other threads:[~2011-06-06 12:22 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 [this message]
2011-06-06 13:49 ` Jiri Slaby
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