Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755452AbaJWLbY (ORCPT ); Thu, 23 Oct 2014 07:31:24 -0400 Received: from 251.110.2.81.in-addr.arpa ([81.2.110.251]:38982 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755376AbaJWLav (ORCPT ); Thu, 23 Oct 2014 07:30:51 -0400 Date: Thu, 23 Oct 2014 12:30:36 +0100 From: One Thousand Gnomes To: Peter Hurley Cc: Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Jiri Slaby , linux-serial@vger.kernel.org Subject: Re: [PATCH -next 11/27] tty: Don't release tty locks for wait queue sanity check Message-ID: <20141023123036.659e8478@alan.etchedpixels.co.uk> In-Reply-To: <5447EA9F.1070401@hurleysoftware.com> References: <1413491125-20134-1-git-send-email-peter@hurleysoftware.com> <1413491125-20134-12-git-send-email-peter@hurleysoftware.com> <20141022162911.432c9bcc@alan.etchedpixels.co.uk> <5447EA9F.1070401@hurleysoftware.com> Organization: Intel Corporation X-Mailer: Claws Mail 3.9.3 (GTK+ 2.24.23; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > (and -- don't laugh -- explore why printk disables interrupts and prevents > cpu migration while calling the console drivers. Seems ok to me...) It disables interrupts so that the chance of the oops getting out is maximised, it locks down some of the other bits to try and stop interleaved oopses producing garbage when say a 16 way server goes pop and all the cpus oops at once. Not sure about the migration 8) Alan -- 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/