From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keith Packard Subject: Re: system freeze with kernel 3.2-rc7 Date: Sun, 25 Dec 2011 19:25:51 -0800 Message-ID: <86boqw9fpc.fsf@sumi.keithp.com> References: <86sjk8gmu7.fsf@sumi.keithp.com> <3j3ls8-i64.ln1@hurikhan.ath.cx> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0793769796==" Return-path: Received: from keithp.com (home.keithp.com [63.227.221.253]) by gabe.freedesktop.org (Postfix) with ESMTP id 031A29E7E4 for ; Sun, 25 Dec 2011 19:24:34 -0800 (PST) In-Reply-To: <3j3ls8-i64.ln1@hurikhan.ath.cx> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Kai Krakow , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org --===============0793769796== Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On Mon, 26 Dec 2011 03:43:22 +0100, Kai Krakow wrote: > Keith Packard schrieb: >=20 > > On Mon, 26 Dec 2011 01:43:37 +0100, Kai Krakow > > wrote: > >=20 > >> I didn't have such issues with early 3.2 rcs (afair), and not with 3.1 > >> kernels. After some digging through google I've found you enabled RC6 = in > >> 3.2. I disabled it now, and my system runs wonderfully. > >=20 > > Argh. Can you try building a kernel with VT-d support? I assume you > > can't turn VT-d off in the BIOS as it's UEFI? >=20 > kakra@jupiter ~ $ zgrep -i iommu /proc/config.gz=20 > CONFIG_GART_IOMMU=3Dy > # CONFIG_CALGARY_IOMMU is not set > CONFIG_IOMMU_HELPER=3Dy > CONFIG_IOMMU_API=3Dy > CONFIG_IOMMU_SUPPORT=3Dy > # CONFIG_AMD_IOMMU is not set > CONFIG_INTEL_IOMMU=3Dy > CONFIG_INTEL_IOMMU_DEFAULT_ON=3Dy > CONFIG_INTEL_IOMMU_FLOPPY_WA=3Dy > # CONFIG_IOMMU_DEBUG is not set > # CONFIG_IOMMU_STRESS is not set >=20 > So kernel vt-d support is on. Not sure what to look for in dmesg thou... = I=20 > didn't look into the BIOS settings yet, but usually if there is such an=20 > option I turn it on because I use virtual machines. You almost certainly don't need IOMMU/VT-d support though; that virtualizes devices for DMA by the guest OS, which generally no-one does. The BIOS manual for the Z68 board mentions two configuration options, CPU Configuration: Intel Virtualization Technology When this option is set to [Enabled], a VMM (Virtual Machine Architecture) can utilize the additional hardware capabilities provided by Vanderpool Technology. This option will be hidden if the installed CPU does not support Intel Virtualization Technology. North Bridge Configuration: VT-d Use this to enable or disable Intel=C2=AE VT-d technology (Intel=C2= =AE Virtualization Technology for Directed I/O). The default value of this feature is [Disabled]. I'd love to see tests with these in the three possible combinations: VT enabled, VT-d enabled VT enabled, VT-d disabled VT disabled, VT-d disabled Meanwhile, I'll get a patch ready for 3.2 which disables RC6 again. =2D-=20 keith.packard@intel.com --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIVAwUBTvfpPzYtFsjWk68qAQjzew/9FmIPJK0m8/+v0UHmKJCJb6UjIjaXPyLj QDx3lfwfXw2SOrz2geGTxWnXM/Ck70LfQEtvGv69rjuhwaL9uleO+QQH2DAHzmdx F/rkllKZTZKzFdMjlLtJ9UU3XiXKGTyPi7ZwEQSZVqox2ajp/lmCU8Epx0y6zYCG DdD0MfniyiBWPJYaZc/b1dSbbe+VgLseGjpBrhqv+0DxZTHfOu5Uz8CdjlztOqU/ BfvvtrBlkQtQE6SGRB/RaFH/eCN0WFJRgn6NPhgkxvhNFJ/z8M5rsYzmN48WEdFH J0vBWPxwM2F0EMMojaVPJltXiXBnc9IiBks9xsq/2YflHvmgxBdq78aqx0SGMUmz 2Ues7w9zZtX73mWKawXXqxhgaPWvhB26Yb8fTuaiYaaHGjx7IJ7Y7x23G3IwWggl lgHEFIp21VkQWrd1Jd+NhJqfuU3wAorB/WiBALh4/IFglXAG9ZFYy/qhxJynE9mo 9mMyNlqucjKRLRPAtMHPIyEC14YcwuIFhRiJKxnYyQ0GHjPuZJq89DylUO87jx7i nfGDbzgvS5YbMQKpzDBYZ4wwU4g18Irw37/QgBtj2wXWOfdbL27RuvyZryLSoHgq uhFQLqG252/Dkv3NmJN2v6Xzofc5Fh/zukEOuTPpGirbr2u3jik67MUZFW99YZgz HSk1sx+2rJE= =5GX3 -----END PGP SIGNATURE----- --=-=-=-- --===============0793769796== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx --===============0793769796==--