From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Helgaas Date: Mon, 04 Jan 2010 23:50:39 +0000 Subject: Re: [drm:drm_mmap_locked] *ERROR* Could not find map: Could this be kernel-related? Message-Id: <201001041650.39862.bjorn.helgaas@hp.com> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: linux-ia64@vger.kernel.org On Monday 04 January 2010 03:40:46 pm =C9meric Maschino wrote: > Indeed, it seems that something is going wrong with AGP GART. Here are > the relevant lines of the dmesg output: >=20 > [=A0=A0 12.652322] Linux agpgart interface v0.103 > [=A0=A0 12.715735] Unable to handle kernel NULL pointer dereference > (address 0000000000000003) > [=A0=A0 12.715784] modprobe[895]: Oops 8804682956800 [1] > [=A0=A0 12.715819] Modules linked in: hp_agp(+) agpgart snd_fm801 > snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm > snd_page_alloc snd_tea575x_tuner videodev v4l1_compat > v4l2_compat_ioctl32 i2c_core snd_opl3_lib snd_hwdep snd_mpu401_uart > snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer > snd_seq_device snd fm801_gp soundcore gameport evdev ext4 mbcache jbd2 > crc16 sd_mod crc_t10dif usbhid hid ide_cd_mod cdrom ide_pci_generic > ata_generic libata tg3 mptspi mptscsih e100 ohci_hcd cmd64x libphy > mptbase scsi_transport_spi scsi_mod mii ide_core ehci_hcd usbcore > nls_base [last unloaded: scsi_wait_scan] > [=A0=A0 12.716925] > [=A0=A0 12.716926] Pid: 895, CPU 0, comm:=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0 modprobe > [=A0=A0 12.716988] psr : 00001010085a6010 ifs : 8000000000000712 ip=A0 : > []=A0=A0=A0 Not tainted (2.6.32-trunk-mckinley) > [=A0=A0 12.717044] ip is at zx1_gart_probe+0xd0/0xcc0 [hp_agp] This definitely looks like a kernel problem. I tried to reproduce it, but regrettably, the current upstream kernel croaks before I get that far with this: Unable to handle kernel paging request at virtual address a00000010400ab00 swapper[0]: Oops 8804682956800 [1] Modules linked in: Pid: 0, CPU 0, comm: swapper psr : 00001010084a6018 ifs : 8000000000000288 ip : [] = Not tainted (2.6.33-rc2-00302-gc5974b8) ip is at proc_net_ns_init+0x100/0x160 Guess I'll have to sort through that problem first. Bjorn