From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maarten Lankhorst Subject: Re: 3.18-rc regression: drm/nouveau: use shared fences for readable objects Date: Wed, 19 Nov 2014 09:10:45 +0100 Message-ID: <546C5085.1020300@canonical.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mblankhorst.nl (mblankhorst.nl [141.105.120.124]) by gabe.freedesktop.org (Postfix) with ESMTP id 1E6B96E851 for ; Wed, 19 Nov 2014 00:17:02 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Michael Marineau , dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, Ben Skeggs List-Id: dri-devel@lists.freedesktop.org SGV5LAoKT24gMTktMTEtMTQgMDc6NDMsIE1pY2hhZWwgTWFyaW5lYXUgd3JvdGU6Cj4gT24gMy4x OC1yYyBrZXJuZWwncyBJIGhhdmUgYmVlbiBpbnRlcm1pdHRlbnRseSBleHBlcmllbmNpbmcgR1BV Cj4gbG9ja3VwcyBzaG9ydGx5IGFmdGVyIHN0YXJ0dXAsIGFjY29tcGFuaWVkIHdpdGggb25lIG9y IGJvdGggb2YgdGhlCj4gZm9sbG93aW5nIGVycm9yczoKPiAKPiBub3V2ZWF1IEVbICAgUEZJRk9d WzAwMDA6MDE6MDAuMF0gcmVhZCBmYXVsdCBhdCAweDAwMDczNGEwMDAgW1BURV0KPiBmcm9tIFBC RE1BMC9IT1NUX0NQVSBvbiBjaGFubmVsIDB4MDA3ZmFhMzAwMCBbdW5rbm93bl0KPiBub3V2ZWF1 IEVbICAgICBEUk1dIEdQVSBsb2NrdXAgLSBzd2l0Y2hpbmcgdG8gc29mdHdhcmUgZmJjb24KPiAK PiBJIHdhcyBhYmxlIHRvIHRyYWNlIHRoZSBpc3N1ZSB3aXRoIGJpc2VjdCB0byBjb21taXQKPiA4 MDllOTQ0N2I5MmZmZTEzNDZiMmQ2ZWMzOTBlMjEyZDUzMDdmNjFjICJkcm0vbm91dmVhdTogdXNl IHNoYXJlZAo+IGZlbmNlcyBmb3IgcmVhZGFibGUgb2JqZWN0cyIuIFRoZSBsb2NrdXBzIGFwcGVh ciB0byBoYXZlIGNsZWFyZWQgdXAKPiBzaW5jZSByZXZlcnRpbmcgdGhhdCBhbmQgYSBmZXcgcmVs YXRlZCBmb2xsb3d1cCBjb21taXRzOgo+IAo+IDgwOWU5NDQ3OiAiZHJtL25vdXZlYXU6IHVzZSBz aGFyZWQgZmVuY2VzIGZvciByZWFkYWJsZSBvYmplY3RzIgo+IDA1NWRmZmRmOiAiZHJtL25vdXZl YXU6IGJ1bXAgZHJpdmVyIHBhdGNobGV2ZWwgdG8gMS4yLjEiCj4gZTNiZTRjMjM6ICJkcm0vbm91 dmVhdTogc3BlY2lmeSBpZiBpbnRlcnJ1cHRpYmxlIHdhaXQgaXMgZGVzaXJlZCBpbgo+IG5vdXZl YXVfZmVuY2Vfc3luYyIKPiAxNWE5OTZiYjogImRybS9ub3V2ZWF1OiBhc3NpZ24gZmVuY2VfY2hh bi0+bmFtZSBjb3JyZWN0bHkiCgpXZWlyZC4gSSdtIG5vdCBzdXJlIHlldCB3aGF0IGNhdXNlcyBp dC4KCmh0dHA6Ly9jZ2l0LmZyZWVkZXNrdG9wLm9yZy9+bWxhbmtob3JzdC9saW51eC9jb21taXQv P2g9Zml4ZWQtZmVuY2VzLWZvci1iaXNlY3QmaWQ9ODZiZTRmMjE2YmJiOWVhMzMzOTg0M2E1NjU4 ZDRjMjExNjJjN2VlMgoKT24gdGhlIEVESVRFRCBwYXRjaCBmcm9tIGZpeGVkLWZlbmNlcy1mb3It YmlzZWN0LCBjYW4geW91IGRvIHRoZSBmb2xsb3dpbmc6CgpJbiBub3V2ZWF1L252ODRfZmVuY2Uu YyBmdW5jdGlvbiBudjg0X2ZlbmNlX2NvbnRleHRfbmV3LCByZW1vdmUKCmZjdHgtPmJhc2Uuc2Vx dWVuY2UgPSBudjg0X2ZlbmNlX3JlYWQoY2hhbik7CgphbmQgYWRkIGJhY2sKCm5vdXZlYXVfYm9f d3IzMihwcml2LT5ibywgY2hhbi0+Y2hpZCAqIDE2LzQsIDB4MDAwMDAwMDApOwoKSWYgdGhhdCBm YWlscyB5b3Ugc2hvdWxkIGNvbXBpbGUgeW91ciBrZXJuZWwgd2l0aCB0cmFjZSBldmVudHMsIHRv IGdldCBzb21lIGRlYnVnZ2luZyBpbmZvIGZyb20gdGhlIGZlbmNlcy4gSSdsbCBwb3N0IGRlYnVn Z2luZyBpbmZvIGlmIHRoaXMgZG9lcyBub3QgZml4IGl0LgoKfk1hYXJ0ZW4KX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlz dApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVza3Rv cC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755504AbaKSIRI (ORCPT ); Wed, 19 Nov 2014 03:17:08 -0500 Received: from mblankhorst.nl ([141.105.120.124]:35010 "EHLO mblankhorst.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754978AbaKSIRD (ORCPT ); Wed, 19 Nov 2014 03:17:03 -0500 X-Greylist: delayed 371 seconds by postgrey-1.27 at vger.kernel.org; Wed, 19 Nov 2014 03:17:03 EST Message-ID: <546C5085.1020300@canonical.com> Date: Wed, 19 Nov 2014 09:10:45 +0100 From: Maarten Lankhorst User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Michael Marineau , dri-devel@lists.freedesktop.org CC: linux-kernel@vger.kernel.org, Ben Skeggs , David Airlie Subject: Re: 3.18-rc regression: drm/nouveau: use shared fences for readable objects References: In-Reply-To: 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 Hey, On 19-11-14 07:43, Michael Marineau wrote: > On 3.18-rc kernel's I have been intermittently experiencing GPU > lockups shortly after startup, accompanied with one or both of the > following errors: > > nouveau E[ PFIFO][0000:01:00.0] read fault at 0x000734a000 [PTE] > from PBDMA0/HOST_CPU on channel 0x007faa3000 [unknown] > nouveau E[ DRM] GPU lockup - switching to software fbcon > > I was able to trace the issue with bisect to commit > 809e9447b92ffe1346b2d6ec390e212d5307f61c "drm/nouveau: use shared > fences for readable objects". The lockups appear to have cleared up > since reverting that and a few related followup commits: > > 809e9447: "drm/nouveau: use shared fences for readable objects" > 055dffdf: "drm/nouveau: bump driver patchlevel to 1.2.1" > e3be4c23: "drm/nouveau: specify if interruptible wait is desired in > nouveau_fence_sync" > 15a996bb: "drm/nouveau: assign fence_chan->name correctly" Weird. I'm not sure yet what causes it. http://cgit.freedesktop.org/~mlankhorst/linux/commit/?h=fixed-fences-for-bisect&id=86be4f216bbb9ea3339843a5658d4c21162c7ee2 On the EDITED patch from fixed-fences-for-bisect, can you do the following: In nouveau/nv84_fence.c function nv84_fence_context_new, remove fctx->base.sequence = nv84_fence_read(chan); and add back nouveau_bo_wr32(priv->bo, chan->chid * 16/4, 0x00000000); If that fails you should compile your kernel with trace events, to get some debugging info from the fences. I'll post debugging info if this does not fix it. ~Maarten