Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758566Ab1FBJad (ORCPT ); Thu, 2 Jun 2011 05:30:33 -0400 Received: from mail-out.m-online.net ([212.18.0.9]:35476 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753021Ab1FBJab (ORCPT ); Thu, 2 Jun 2011 05:30:31 -0400 From: Andreas Schwab To: Benjamin Herrenschmidt Cc: "linux-kernel\@vger.kernel.org" Subject: Re: tty breakage in X (Was: tty vs workqueue oddities) References: <1306999045.29297.55.camel@pasglop> <1307003821.29297.77.camel@pasglop> X-Yow: Hello. Just walk along and try NOT to think about your INTESTINES being almost FORTY YARDS LONG!! Date: Thu, 02 Jun 2011 11:30:27 +0200 In-Reply-To: <1307003821.29297.77.camel@pasglop> (Benjamin Herrenschmidt's message of "Thu, 02 Jun 2011 18:37:01 +1000") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 937 Lines: 23 Benjamin Herrenschmidt writes: > It looks like the patch is causing some major malfunctions of the X > server for me, possibly related to PTYs. For example, cat'ing a large > file in a gnome terminal hangs the kernel for -minutes- in a loop of > what looks like flush_to_ldisc/workqueue code, (some ftrace data in the > quoted bits further down). Btw., do you already have d72bce0 ("rcu: Cure load woes")? Although that is about an independent bug, it appears to amplify this issue a lot. Andreas. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." -- 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/