Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756266Ab1FFNta (ORCPT ); Mon, 6 Jun 2011 09:49:30 -0400 Received: from mail-bw0-f46.google.com ([209.85.214.46]:34002 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751147Ab1FFNt3 (ORCPT ); Mon, 6 Jun 2011 09:49:29 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:x-enigmail-version:content-type :content-transfer-encoding; b=bG4EFjVQchnZD8zuxBL+ypDMYft75yzCu1knozfqbjC64b8t96jvUDkhiLvw+H9CDp 90JPwJctl9YyJGrfgeEN5Ozny6VsKxlg9FnuVHAO16MoBPxR1CnTRgXs+f+6m+Ehjr9L CucO6498OAzMsu0khsExz10E3aPCn6nucJnmk= Message-ID: <4DECDAE5.3080006@suse.cz> Date: Mon, 06 Jun 2011 15:49:25 +0200 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:5.0) Gecko/20110531 Thunderbird/5.0b1 MIME-Version: 1.0 To: Alan Cox CC: gregkh@suse.de, jirislaby@gmail.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] serial: 8250, increase PASS_LIMIT References: <1307307109-27776-1-git-send-email-jslaby@suse.cz> <20110606130945.7ad9edef@bob.linux.org.uk> In-Reply-To: <20110606130945.7ad9edef@bob.linux.org.uk> X-Enigmail-Version: 1.2a2pre Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1124 Lines: 30 On 06/06/2011 02:09 PM, Alan Cox wrote: > On Sun, 5 Jun 2011 22:51:49 +0200 > Jiri Slaby wrote: > >> From: Jiri Slaby >> >> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/