From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751874Ab1AIMpZ (ORCPT ); Sun, 9 Jan 2011 07:45:25 -0500 Received: from mail-fx0-f46.google.com ([209.85.161.46]:40731 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751717Ab1AIMpY (ORCPT ); Sun, 9 Jan 2011 07:45:24 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:mime-version:content-type :content-disposition:user-agent; b=Qka6Yzyuld6asqkq7q4gna9mmQYnjwhSiiY3iAgH2Yzf/Xj7nsgdi3ULvD+xYhetZw 9VP72uWplk4JwZiaNs58dxccmfhaIdXsEiPTiFyESaVQBWgftqUEGnD5oiJBw6UNAGl1 uXlZyCAv9R1KoTZ0QtAXQcABpd4CsArZKxvRQ= Date: Sun, 9 Jan 2011 13:44:23 +0100 From: "Carlos R. Mafra" To: LKML Cc: chris@chris-wilson.co.uk Subject: 2.6.37: *ERROR* Attempting to mmap a purgeable buffer Message-ID: <20110109124423.GA9131@Pilar.site> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I'd like to report an issue which just happened while using 2.6.37. I was transfering some large files between two external harddisks using btrfs and suddenly my window manager exited and I was left in the login screen of kdm. The end of dmesg looks like: [42460.335771] sdd: sdd1 sdd2 sdd3 sdd4 [42460.337496] sd 34:0:0:0: [sdd] Assuming drive cache: write through [42460.337500] sd 34:0:0:0: [sdd] Attached SCSI disk [42468.912626] device fsid 4b41009f616ab3b8-a8cf4357d5b54bb4 devid 1 transid 950 /dev/sdd2 [42468.913839] btrfs: use compression [42893.878855] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap a purgeable buffer and before that there is nothing out of the usual. After starting the window manager again all things look ok. I am reporting this anyway, in case it might help improving the kernel and making it stabler. The error string is from ab18282d58c ("drm/i915: Warn before mmaping a purgeable buffer.") from 2009, so I'm cc:ing the author. My laptop is a 64-bit Vaio with Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c) and today was the first time this error happened, afaict. Is there something else I can do to help? Is this something fixable in the kernel or was it an error with my hardware? Suddenly being kicked out of X is quite bad, so I hope this can be fixed :-)