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Date: Sun, 28 Oct 2012 16:09:35 +0100 From: Paweł Sikora <pawel.sikora@...k.net> To: Don Morris <don.morris@...com> Cc: linux-kernel@...r.kernel.org, airlied@...hat.com Subject: Re: [3.6.2] oops @ opteron server: mgag200 Fatal error during GPU init On Friday 19 of October 2012 07:37:55 Don Morris wrote: > On 10/19/2012 04:53 AM, Paweł Sikora wrote: > > Hi, > > > > on the new opteron server i'm observing an oops during matrox video initialization. > > here's the dmesg from pure 3.6.2 kernel: > > I haven't owned a G200 based Matrox in years, but based on code > analysis and your output, it looks to me like the VRAM init failure > results in our taking the unload/cleanup backout path well before > the call to drm_mode_config_init() in mgag200_driver_load(). > drm_mode_config_cleanup() doesn't handle that situation. > > So I would think either drm_mode_config_cleanup() itself needs > revision to handle being called with an uninitialized data set > (better general solution, but that may violate expectations and > I'd think the maintainers would want to chime in on how to signify > that) or we have the driver use some common sense and clean up what > it really did. > > I've generated a patch for the latter, does it solve your immediate > problem? It won't solve the VRAM init failure, I know. > I've built it, but without a G200, haven't tested myself. > > Don Morris > HP Mission Critical Linux > > > > > [ 20.598985] [drm] Initialized drm 1.1.0 20060810 > > [ 20.642302] [drm:mga_vram_init] *ERROR* can't reserve VRAM > > [ 20.642307] mgag200 0000:01:04.0: Fatal error during GPU init: -6 > > [ 20.642319] BUG: unable to handle kernel NULL pointer dereference at (null) > > [ 20.664413] IP: [<ffffffffa03c364f>] drm_mode_config_cleanup+0x1f/0x1c0 [drm] > > [ 20.675905] PGD 40869b067 PUD 4086a4067 PMD 0 > > [ 20.687362] Oops: 0000 [#1] SMP > > [ 20.698748] Modules linked in: igb(+) usb_storage(+) mgag200(+) ttm crc32c_intel ghash_clmulni_intel drm_kms_helper drm aesni_intel usb_libusual dca ablk_helper uas i2c_algo_bit sysimgblt cryptd sysfillrect syscopyarea ptp aes_x86_64 pps_core evdev joydev pcspkr aes_generic hid_generic fam15h_power(+) i2c_piix4(+) atiixp(+) k10temp i2c_core microcode ide_core amd64_edac_mod edac_core hwmon edac_mce_amd processor button uhci_hcd ext3 jbd mbcache raid1 md_mod usbhid hid ohci_hcd ehci_hcd usbcore usb_common uvesafb sd_mod crc_t10dif ahci libahci libata scsi_mod > > [ 20.750381] CPU 12 > > [ 20.750478] Pid: 463, comm: udevd Not tainted 3.6.2 #4 Supermicro H8DGU/H8DGU > > [ 20.776696] RIP: 0010:[<ffffffffa03c364f>] [<ffffffffa03c364f>] drm_mode_config_cleanup+0x1f/0x1c0 [drm] > > [ 20.790249] RSP: 0018:ffff8804086a3a88 EFLAGS: 00010296 > > [ 20.803729] RAX: 0000000000000000 RBX: ffff881007f41000 RCX: 0000000000000043 > > [ 20.817409] RDX: 0000000000000000 RSI: 0000000000000046 RDI: ffff881008d83000 > > [ 20.831003] RBP: ffff8804086a3aa8 R08: 000000000000000a R09: 00000000000003ff > > [ 20.844580] R10: 0000000000000000 R11: 00000000000003fe R12: ffff881008d83000 > > [ 20.858085] R13: ffff881008d83460 R14: ffff881007f41000 R15: ffff881008d833a0 > > [ 20.871607] FS: 00007fc87267c800(0000) GS:ffff88101ec00000(0000) knlGS:0000000000000000 > > [ 20.885316] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [ 20.899017] CR2: 0000000000000000 CR3: 000000040869a000 CR4: 00000000000407e0 > > [ 20.912916] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > [ 20.926724] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > > [ 20.940450] Process udevd (pid: 463, threadinfo ffff8804086a2000, task ffff88040846ee00) > > [ 20.942880] Probing IDE interface ide1... > > [ 20.968028] Stack: > > [ 20.981616] ffff881007f41000 ffff881007f41000 ffff881008d83000 ffffffffa029a8e0 > > [ 20.995514] ffff8804086a3ac8 ffffffffa02942c7 00000000fffffffa ffff881008ddd000 > > [ 21.009470] ffff8804086a3b58 ffffffffa029462e ffff8804086a3af8 ffffffffa03c11a1 > > [ 21.023443] Call Trace: > > [ 21.037295] [<ffffffffa02942c7>] mgag200_driver_unload+0x37/0x70 [mgag200] > > [ 21.051493] [<ffffffffa029462e>] mgag200_driver_load+0x32e/0x4b0 [mgag200] > > [ 21.065600] [<ffffffffa03c11a1>] ? drm_sysfs_device_add+0x81/0xb0 [drm] > > [ 21.079699] [<ffffffffa03bd469>] ? drm_get_minor+0x259/0x2f0 [drm] > > [ 21.093733] [<ffffffffa03bfaae>] drm_get_pci_dev+0x17e/0x2c0 [drm] > > [ 21.107675] [<ffffffffa0299405>] mga_pci_probe+0xb1/0xb9 [mgag200] > > [ 21.121582] [<ffffffff8127f854>] local_pci_probe+0x74/0x100 > > [ 21.135386] [<ffffffff8127f9f1>] pci_device_probe+0x111/0x120 > > [ 21.149106] [<ffffffff813319e6>] driver_probe_device+0x76/0x240 > > [ 21.162801] [<ffffffff81331c4b>] __driver_attach+0x9b/0xa0 > > [ 21.176411] [<ffffffff81331bb0>] ? driver_probe_device+0x240/0x240 > > [ 21.190062] [<ffffffff8132fd4d>] bus_for_each_dev+0x4d/0x90 > > [ 21.203724] [<ffffffff81331509>] driver_attach+0x19/0x20 > > [ 21.217443] [<ffffffff81331100>] bus_add_driver+0x190/0x260 > > [ 21.231260] [<ffffffffa02c5000>] ? 0xffffffffa02c4fff > > [ 21.245155] [<ffffffffa02c5000>] ? 0xffffffffa02c4fff > > [ 21.259047] [<ffffffff813322d2>] driver_register+0x72/0x170 > > [ 21.272998] [<ffffffffa02c5000>] ? 0xffffffffa02c4fff > > [ 21.286900] [<ffffffff8127e6c9>] __pci_register_driver+0x59/0xd0 > > [ 21.300840] [<ffffffffa02c5000>] ? 0xffffffffa02c4fff > > [ 21.314682] [<ffffffffa03bfd0a>] drm_pci_init+0x11a/0x130 [drm] > > [ 21.328540] [<ffffffffa02c5000>] ? 0xffffffffa02c4fff > > [ 21.342301] [<ffffffffa02c5032>] mgag200_init+0x32/0x1000 [mgag200] > > [ 21.356065] [<ffffffff81002122>] do_one_initcall+0x122/0x170 > > [ 21.369741] [<ffffffff810aa176>] sys_init_module+0xfe6/0x1e50 > > [ 21.383355] [<ffffffff810a6920>] ? free_notes_attrs+0x60/0x60 > > [ 21.396935] [<ffffffff814ae579>] system_call_fastpath+0x16/0x1b > > [ 21.410479] Code: 5d 41 5e 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 41 55 41 54 49 89 fc 4d 8d ac 24 60 04 00 00 53 48 83 ec 08 48 8b 87 60 04 00 00 <48> 8b 18 48 8d 78 f8 48 83 eb 08 49 39 c5 74 1c 90 48 8b 47 40 > > [ 21.439403] RIP [<ffffffffa03c364f>] drm_mode_config_cleanup+0x1f/0x1c0 [drm] > > [ 21.453651] RSP <ffff8804086a3a88> > > [ 21.467829] CR2: 0000000000000000 > > [ 21.481651] ---[ end trace ecb4d159319307e6 ]--- > > > > > > 01:04.0 VGA compatible controller: Matrox Electronics Systems Ltd. MGA G200eW WPCM450 (rev 0a) (prog-if 00 [VGA controller]) > > Subsystem: Super Micro Computer Inc H8DGU > > Flags: bus master, medium devsel, latency 64, IRQ 20 > > Memory at fc000000 (32-bit, prefetchable) [size=16M] > > Memory at fdffc000 (32-bit, non-prefetchable) [size=16K] > > Memory at fe000000 (32-bit, non-prefetchable) [size=8M] > > Expansion ROM at <unassigned> [disabled] > > Capabilities: [dc] Power Management version 1 > > Kernel driver in use: mgag200 > > Kernel modules: mgag200 > > with this patch kernel-3.6.3 doesn't ooops: # dmesg|egrep -i '(drm|mga)' [ 17.118271] [drm] Initialized drm 1.1.0 20060810 [ 17.664075] fbcon: mgadrmfb (fb0) is primary device [ 18.057092] [drm] mga base 0 [ 18.305324] fb0: mgadrmfb frame buffer device [ 18.305325] drm: registered panic notifier [ 18.305329] [drm] Initialized mgag200 1.0.0 20110418 for 0000:01:04.0 on minor 0 [ 19.114953] uvesafb: Matrox, MGA-G200, 00, OEM: Matrox Graphics Inc., VBE v3.0 BR, Paweł. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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