Detailed results at http://benchsrv.fi.intel.com/archive/results/CI_IGT_test/CI_DRM_992/ilk-hp8440p/html/ilk-hp8440p@CI_DRM_992@1/igt@drv_module_reload_basic.html Looks like we leak the gmch dma mapping or similar when unloading intel-agp.ko. Needs dma mapping debugging enabled. [ 256.997445] ------------[ cut here ]------------ [ 256.997455] WARNING: CPU: 3 PID: 5808 at lib/dma-debug.c:974 dma_debug_device_change+0x179/0x1e0() [ 256.997457] pci 0000:00:02.0: DMA-API: device driver has pending DMA allocations while released from device [count=1] One of leaked entries details: [device address=0x0000000000050000] [size=4096 bytes] [mapped with DMA_BIDIRECTIONAL] [mapped as page] [ 256.997459] Modules linked in: ax88179_178a usbnet mii intel_powerclamp i915(-) coretemp crct10dif_pclmul crc32_pclmul lpc_ich mei_me mei sdhci_pci sdhci mmc_core e1000e ptp pps_core [ 256.997475] CPU: 3 PID: 5808 Comm: rmmod Tainted: G U 4.4.0-gfxbench+ #1 [ 256.997476] Hardware name: Hewlett-Packard HP EliteBook 8440p/172A, BIOS 68CCU Ver. F.24 09/13/2013 [ 256.997478] ffffffff81a93aa0 ffff880131733c78 ffffffff813e00ac ffff880131733cc0 [ 256.997481] ffff880131733cb0 ffffffff810746f1 ffff8800b6eea6b8 0000000000000001 [ 256.997483] ffff8800b6440e38 ffffffff81a682cf ffff8800b6d191e0 ffff880131733d10 [ 256.997486] Call Trace: [ 256.997490] [<ffffffff813e00ac>] dump_stack+0x4e/0x82 [ 256.997494] [<ffffffff810746f1>] warn_slowpath_common+0x81/0xc0 [ 256.997495] [<ffffffff81074777>] warn_slowpath_fmt+0x47/0x50 [ 256.997501] [<ffffffff810c59e4>] ? trace_hardirqs_on_caller+0x124/0x1b0 [ 256.997503] [<ffffffff81412879>] dma_debug_device_change+0x179/0x1e0 [ 256.997508] [<ffffffff81096fc9>] notifier_call_chain+0x39/0xa0 [ 256.997510] [<ffffffff810973c8>] __blocking_notifier_call_chain+0x48/0x70 [ 256.997512] [<ffffffff81097401>] blocking_notifier_call_chain+0x11/0x20 [ 256.997517] [<ffffffff8151edd0>] __device_release_driver+0x100/0x130 [ 256.997519] [<ffffffff8151eef3>] driver_detach+0xb3/0xc0 [ 256.997521] [<ffffffff8151df23>] bus_remove_driver+0x53/0xd0 [ 256.997524] [<ffffffff8151f917>] driver_unregister+0x27/0x50 [ 256.997526] [<ffffffff814287a5>] pci_unregister_driver+0x25/0x70 [ 256.997529] [<ffffffff814fce94>] drm_pci_exit+0x74/0x90 [ 256.997556] [<ffffffffa01cc210>] i915_exit+0x20/0x19b [i915] [ 256.997560] [<ffffffff810ffbbc>] SyS_delete_module+0x18c/0x1f0 [ 256.997563] [<ffffffff8179e75b>] entry_SYSCALL_64_fastpath+0x16/0x73 [ 256.997564] ---[ end trace a8f932670a4ca3db ]--- [ 256.997565] Mapped at: [ 256.997567] [<ffffffff81413778>] debug_dma_map_page+0x88/0x150 [ 256.997569] [<ffffffff814ccce5>] intel_gmch_probe+0x4c5/0xa10 [ 256.997571] [<ffffffff814cb3c2>] agp_intel_probe+0x42/0x1a0 [ 256.997576] [<ffffffff81429847>] pci_device_probe+0x87/0xf0 [ 256.997578] [<ffffffff8151e911>] driver_probe_device+0x221/0x4a0
http://patchwork.freedesktop.org/series/2851/ fixes this. Needs a bit more polish + CI getting back up, then we're good here.
Assigning to QA for verification
The patches haven't landed yet because lack of review :(
Who would be a good person to review this patch set?
The patches are all in AFAICS. 3e99a6b95614 ("drm/i915: Stop depending upon CONFIG_AGP_INTEL") ebb7c78d358b ("agp/intel-gtt: Only register fake agp driver for gen1") 9f5ac8ed4013 ("agp/intel-gtt: Don't leak the scratch page")
Thanks for the update, Ville.
Test is Pass. No such error in log. Desktop d3c4102 Ubuntu 14.04.4 LTS Libdrm: 2.4.64 Kernel 4.5.0-rc7 drm-intel-nightly from git://anongit.freedesktop.org/drm-intel IGT 1.14
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