From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751542Ab1JIKTv (ORCPT ); Sun, 9 Oct 2011 06:19:51 -0400 Received: from beauty.rexursive.com ([150.101.121.179]:42570 "EHLO beauty.rexursive.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750868Ab1JIKTu (ORCPT ); Sun, 9 Oct 2011 06:19:50 -0400 Subject: Re: [PATCH v8]: Improve performance of LZO/plain hibernation Date: Sun, 09 Oct 2011 21:19:35 +1100 From: "Bojan Smojver" To: penberg@cs.helsinki.fi Cc: rjw@sisk.pl, linux-kernel@vger.kernel.org, linux-pm@lists.linux-foundation.org MIME-Version: 1.0 X-Mailer: LCG ProfiMail 3.48 Message-ID: <6127211897.1002662375@rexursive.com> References: <1317342456.1959.6.camel@shrek.rexursive.com> <3169978091.1002283638@rexursive.com> <201110062037.14322.rjw@sisk.pl> <201110062045.48689.rjw@sisk.pl> Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ------- Original message ------- > From: Pekka Enberg > To: rjw@sisk.pl > Cc: bojan@rexursive.com, linux-kernel@vger.kernel.org, > linux-pm@lists.linux-foundation.org > Sent: 9.10.'11, 20:22 > > On Thu, Oct 6, 2011 at 9:45 PM, Rafael J. Wysocki wrote: >> The panic happens during late resume, when trying to switch to the >> hibernated >> kernel. > > Is there some way to autotest hibernation? I could try to reproduce > the issue but I'm certainly not going to hibernate/resume by hand... > :-) I kinda remember reading in one of the bug reports for Intel graphics about someone doing it. Not sure how, to be honest. Rafael will know for sure. May be related, when I simulate image loading failure by returning error from load_image(), I get bad page state error, count -1, so something is amiss. Probably the readahead buffers or maps. PS. I will also rewrite some of the vmalloc() calls to kmalloc(). No point wasting whole pages for small objects. -- Bojan