From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39A09C2BA16 for ; Tue, 7 Apr 2020 07:20:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 16F1820678 for ; Tue, 7 Apr 2020 07:20:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727751AbgDGHUu (ORCPT ); Tue, 7 Apr 2020 03:20:50 -0400 Received: from jabberwock.ucw.cz ([46.255.230.98]:35104 "EHLO jabberwock.ucw.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726865AbgDGHUu (ORCPT ); Tue, 7 Apr 2020 03:20:50 -0400 Received: by jabberwock.ucw.cz (Postfix, from userid 1017) id 935241C4A51; Tue, 7 Apr 2020 09:20:48 +0200 (CEST) Date: Tue, 7 Apr 2020 09:20:47 +0200 From: Pavel Machek To: kernel list , jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, intel-gfx@lists.freedesktop.org, airlied@redhat.com, chris@chris-wilson.co.uk, matthew.auld@intel.com, Linus Torvalds Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com Subject: Linus, please revert 7dc8f11437: regression in 5.7-rc0, hangs while attempting to run X Message-ID: <20200407072047.GA18532@amd.ucw.cz> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="vkogqOf2sHV7VnPd" Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --vkogqOf2sHV7VnPd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri 2020-04-03 15:00:31, Pavel Machek wrote: > Hi! >=20 > 7dc8f1143778a35b190f9413f228b3cf28f67f8d >=20 > drm/i915/gem: Drop relocation slowpath > =20 > Since the relocations are no longer performed under a global > struct_mutex, or any other lock, that is also held by pagefault handl= ers, > we can relax and allow our fast path to take a fault. As we no longer > need to abort the fast path for lock avoidance, we no longer need the > slow path handling at all. >=20 > causes regression on thinkpad x220: instead of starting X, I'm looking > at blinking cursor. >=20 > Reverting the patch on too of 919dce24701f7b3 fixes things for me. I have received no feedback from patch authors, and I believe we don't want to break boot in -rc1 on Intel hardware... so the commit should be simply reverted. Best regards, Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --vkogqOf2sHV7VnPd Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iF0EABECAB0WIQRPfPO7r0eAhk010v0w5/Bqldv68gUCXowpzwAKCRAw5/Bqldv6 8kkIAKCeh1vybMCCVOEA5UsenI/abMGdJwCgpcZnBGOuqMUIojYfdcW6XC9hOIM= =woPH -----END PGP SIGNATURE----- --vkogqOf2sHV7VnPd--