From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751902AbdEVGCI (ORCPT ); Mon, 22 May 2017 02:02:08 -0400 Received: from mga01.intel.com ([192.55.52.88]:23846 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751519AbdEVGCF (ORCPT ); Mon, 22 May 2017 02:02:05 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.38,377,1491289200"; d="scan'208";a="971508456" Message-ID: <1495432920.4034.4.camel@linux.intel.com> Subject: Re: Q. drm/i915 shrinker, synchronize_rcu_expedited() from handlers From: Joonas Lahtinen To: "J. R. Okajima" , Andrea Arcangeli , chris@chris-wilson.co.uk, daniel.vetter@ffwll.ch, jani.nikula@intel.com, linux-kernel@vger.kernel.org Date: Mon, 22 May 2017 09:02:00 +0300 In-Reply-To: <4234.1495245385@jrobl> References: <7743.1493532478@jrobl> <20170430094348.GA5970@redhat.com> <16988.1493604328@jrobl> <1493977180.3551.24.camel@linux.intel.com> <17413.1494026939@jrobl> <4234.1495245385@jrobl> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.20.5 (3.20.5-1.fc24) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On la, 2017-05-20 at 10:56 +0900, J. R. Okajima wrote: > "J. R. Okajima": > > > > I don't know whether the fix is good to me or not yet. I will test your > > fix, but I am busy now and my test will be a few weeks later. Other > > people may want the fix soon. So I'd suggest you to reproduce the > > problem on your side. I guess "mem=1G" or "mem=512M" will make it easier > > to reproduce the problem. > > Of course, if you are sure the fix is correct, then you don't have to > > wait for my test. Release it soon for other people. > > Now I am going to able to run my local test. > But V3 patch failed to apply onto v4.11.0. > > Would you provide us two versions of the patch, one for v4.11 series and > the other of v4.12-rcN? For v4.12-rc2 the backport is here: https://patchwork.freedesktop.org/patch/156990/ For quick testing on older kernels, just remove all lines with "_rcu" in drivers/gpu/drm/i915/i915_gem_shrinker.c . Regards, Joonas PS: It'll help to subscribe to and track our mailing list at intel-gfx@lists.freedesktop.org for future convenience. -- Joonas Lahtinen Open Source Technology Center Intel Corporation