From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Meyer Subject: Re: [UDL] general protection fault in fb_deferred_io_mkwrite() Date: Sat, 18 Aug 2012 13:00:38 +0200 Message-ID: <1345287638.19305.4.camel@localhost.localdomain> References: <1344767672.1272.7.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Bernie Thompson Cc: linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, airlied@linux.ie, dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org Am Sonntag, den 12.08.2012, 14:22 -0700 schrieb Bernie Thompson: > On Sun, Aug 12, 2012 at 3:34 AM, Thomas Meyer wrote: > guilty driver is probably udl_fb.c > any ideas? > > > Hi Thomas, Hi Bernie! > We were seeing similar issues in udlfb (the original fbdev version of > this driver), which were fixed earlier this year by getting all > rendering operations out of probe/disconnect -- those which might > trigger fb_defio page faults in an inappropriate context, or be > long-running. Here's some more detail: > http://plugable.com/2012/06/21/displaylink-usb-devices-on-linux-kernel-3-4-0/comment-page-1/#comment-5896 > > > Unfortunately, I haven't had time to get going with udl myself, so > haven't been able to port and confirm. Thanks for raising and staying > on this. Okay, I see. I'll switch to FB_UDL for now and remove DRM_UDL from my config. Is somebody working on porting commit https://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=8d21547d3c9c3bc653261f26d554cfabc4a083de to the DRM_UDL driver? In Airlie's tree seems to be no commit related to this: http://cgit.freedesktop.org/~airlied/linux/ with kind regards thomas > > > Best wishes, > Bernie > > > [ 45.633336] RIP [] > fb_deferred_io_mkwrite+0xdc/0xf0 > [ 45.633336] RSP > [ 45.711547] ---[ end trace d4732d5a0bf375fb ]--- > [ 45.720961] released /dev/fb1 user=1 count=0 > >