Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761386AbZDILgf (ORCPT ); Thu, 9 Apr 2009 07:36:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753154AbZDILg0 (ORCPT ); Thu, 9 Apr 2009 07:36:26 -0400 Received: from qw-out-2122.google.com ([74.125.92.27]:17706 "EHLO qw-out-2122.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751042AbZDILgZ (ORCPT ); Thu, 9 Apr 2009 07:36:25 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=gidl0j3L/R6F86VMZRzLUuo/mH8DCfAMmBCbaCur951sVE6guH/4Z9PxKLZacNahEy ZF9DZsyftMUZUHq9Le5zHGIrkk/MRfuh3Iy3B/KxlPvLrVKl1EXptmnYbyBNUXeivSwy zW05cyYBjqNCdW964Ow1Z+ZN6MVxA9LrQwqLU= MIME-Version: 1.0 Date: Thu, 9 Apr 2009 19:36:24 +0800 Message-ID: Subject: [REGRESSION] commit 66c1ca0: {fbmem: fix fb_info->lock and mm->mmap_sem ...} causes Xfbdev not working From: Eric Miao To: LKML Cc: Andrea Righi , Geert Uytterhoeven , Krzysztof Helt Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 701 Lines: 22 This happens on my Marvell PXA310-based Littleton platform with Angstrom Distribution. The offending paths are many: FBIOPUT_VSCREENINFO: lock_fb_info() --> fb_set_var() --> fb_notifier_call_chain() [FBINFO_MISC_USEREVENT] --> fbcon_event_notifier() [FB_EVENT_MODE_CHANGE] --> lock_fb_info() OK, now hang. I'd suggest a clean fix to the original assumption of circular locking issue and revert this commit first. -- Cheers - eric -- 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/