And dmesg with radeon.pcie_gen2=0
2.234862] [drm] Initialized drm 1.1.0 20060810
2.241127] [drm] radeon kernel modesetting enabled.
2.246624] [drm] initializing kernel modesetting (CYPRESS 0x1002:0x6899 0x174B:0x174B).
2.246637] [drm] register mmio base: 0xFE420000
2.246638] [drm] register mmio size: 131072
2.246690] ATOM BIOS: CYPRESS
2.246760] radeon 0000:01:00.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used)
2.246762] radeon 0000:01:00.0: GTT: 1024M 0x0000000040000000 - 0x000000007FFFFFFF
2.246764] [drm] Detected VRAM RAM=1024M, BAR=256M
2.246765] [drm] RAM width 256bits DDR
2.247254] [TTM] Zone kernel: Available graphics memory: 4048672 kiB
2.247256] [TTM] Zone dma32: Available graphics memory: 2097152 kiB
2.247257] [TTM] Initializing pool allocator
2.247261] [TTM] Initializing DMA pool allocator
2.247278] [drm] radeon: 1024M of VRAM memory ready
2.247279] [drm] radeon: 1024M of GTT memory ready.
2.247290] [drm] Loading CYPRESS Microcode
2.247345] [drm] Internal thermal controller with fan control
2.278026] [drm] radeon: dpm initialized
2.278114] [drm] GART: num cpu pages 262144, num gpu pages 262144
2.294513] [drm] PCIE GART of 1024M enabled (table at 0x000000000025E000).
2.294603] radeon 0000:01:00.0: WB enabled
2.294606] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff880231f46c00
2.294608] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff880231f46c0c
2.296117] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c418 and cpu addr 0xffffc9001141c418
2.296120] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
2.296121] [drm] Driver supports precise vblank timestamp query.
2.296143] radeon 0000:01:00.0: irq 30 for MSI/MSI-X
2.296153] radeon 0000:01:00.0: radeon: using MSI.
2.296173] [drm] radeon: irq initialized.
2.312767] [drm] ring test on 0 succeeded in 1 usecs
2.312774] [drm] ring test on 3 succeeded in 3 usecs
2.499978] [drm] ring test on 5 succeeded in 1 usecs
2.499984] [drm] UVD initialized successfully.
2.500361] [drm] ib test on ring 0 succeeded in 0 usecs
2.500389] [drm] ib test on ring 3 succeeded in 0 usecs
3.172026] [drm] ib test on ring 5 succeeded
3.172532] [drm] Radeon Display Connectors
3.172534] [drm] Connector 0:
3.172535] [drm] DP-1
3.172535] [drm] HPD4
3.172537] [drm] DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
3.172538] [drm] Encoders:
3.172539] [drm] DFP1: INTERNAL_UNIPHY2
3.172539] [drm] Connector 1:
3.172540] [drm] HDMI-A-1
3.172541] [drm] HPD3
3.172542] [drm] DDC: 0x6460 0x6460 0x6464 0x6464 0x6468 0x6468 0x646c 0x646c
3.172542] [drm] Encoders:
3.172543] [drm] DFP2: INTERNAL_UNIPHY2
3.172544] [drm] Connector 2:
3.172545] [drm] DVI-I-1
3.172545] [drm] HPD6
3.172546] [drm] DDC: 0x6470 0x6470 0x6474 0x6474 0x6478 0x6478 0x647c 0x647c
3.172547] [drm] Encoders:
3.172548] [drm] DFP3: INTERNAL_UNIPHY
3.172549] [drm] CRT1: INTERNAL_KLDSCP_DAC1
3.257751] [drm] fb mappable at 0xC045F000
3.257752] [drm] vram apper at 0xC0000000
3.257753] [drm] size 8294400
3.257754] [drm] fb depth is 24
3.257754] [drm] pitch is 7680
3.258085] fbcon: radeondrmfb (fb0) is primary device
3.261337] Console: switching to colour frame buffer device 240x67
3.266741] radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
3.266742] radeon 0000:01:00.0: registered panic notifier
3.277637] [drm] Initialized radeon 2.40.0 20080528 for 0000:01:00.0 on minor 0
10.752662] ------------ cut here ]------------
10.752669] WARNING: CPU: 3 PID: 900 at ../mm/truncate.c:765 pagecache_isize_extended+0x100/0x110()
10.752670] Modules linked in: nf_log_ipv6 xt_pkttype nf_log_ipv4 nf_log_common xt_LOG xt_limit cfg80211 rfkill ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw ipt_REJECT iptable_raw xt_CT iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables cx88_blackbird cx2341x cx22702 cx88_dvb videobuf_dvb cx88_vp3054_i2c dvb_core wm8775 tuner_simple tuner_types mxm_wmi tda9887 nls_iso8859_1 tda8290 nls_cp437 vfat fat tuner fuse kvm_amd kvm uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core serio_raw snd_usb_audio pcspkr snd_usbmidi_lib k10temp edac_core edac_mce_amd snd_emu10k1 snd_util_mem snd_rawmidi snd_seq_device snd_ac97_codec snd_hda_codec_hdmi cx8802
10.752701] snd_hda_intel cx88_alsa cx8800 cx88xx btcx_risc tveeprom videobuf_dma_sg rc_core v4l2_common videodev videobuf_core snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_timer snd emu10k1_gp gameport ac97_bus sp5100_tco i2c_piix4 tg3 ptp pps_core libphy xhci_pci xhci_hcd soundcore 8250_fintek acpi_cpufreq wmi button shpchp processor dm_mod efivarfs xfs libcrc32c uas usb_storage firewire_ohci firewire_core crc_itu_t radeon ohci_pci i2c_algo_bit drm_kms_helper sr_mod ttm cdrom drm sg
10.752725] CPU: 3 PID: 900 Comm: NetworkManager Tainted: G W 3.18.0-rc3-6-desktop #1
10.752726] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./990FX Extreme4, BIOS P2.70 06/05/2014
10.752728] 0000000000000000 0000000000000009 ffffffff8165830d 0000000000000000
10.752730] ffffffff81060827 0000000000001000 ffff880226e489a8 0000000000000000
10.752731] 0000000000000919 0000000000000000 ffffffff8116a630 0000000000000001
10.752733] Call Trace:
10.752743] <ffffffff810053be>] dump_trace+0x8e/0x350
10.752746] <ffffffff81005726>] show_stack_log_lvl+0xa6/0x190
10.752749] <ffffffff81006ea1>] show_stack+0x21/0x50
10.752753] <ffffffff8165830d>] dump_stack+0x49/0x6a
10.752757] <ffffffff81060827>] warn_slowpath_common+0x77/0x90
10.752760] <ffffffff8116a630>] pagecache_isize_extended+0x100/0x110
10.752764] <ffffffff8116b2a6>] truncate_setsize+0x26/0x40
10.752795] <ffffffffa033c4d5>] xfs_setattr_size+0x165/0x3e0 [xfs]
10.752814] <ffffffffa03316cb>] xfs_file_fallocate+0x2bb/0x2e0 [xfs]
10.752819] <ffffffff811ca9d1>] do_fallocate+0x121/0x1c0
10.752822] <ffffffff811caaaf>] SyS_fallocate+0x3f/0x70
10.752826] <ffffffff8165ee2d>] system_call_fastpath+0x16/0x1b
10.752831] <00007fd0281cb8f0>] 0x7fd0281cb8f0
10.752832] --- end trace ec4f37abdf1e1eb7 ]---
10.783138] NET: Registered protocol family 17
12.757528] Bluetooth: Core ver 2.19
12.757548] NET: Registered protocol family 31
12.757550] Bluetooth: HCI device and connection manager initialized
12.757558] Bluetooth: HCI socket layer initialized
12.757560] Bluetooth: L2CAP socket layer initialized
12.757566] Bluetooth: SCO socket layer initialized
12.760999] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
12.761002] Bluetooth: BNEP filters: protocol multicast
12.761008] Bluetooth: BNEP socket layer initialized
12.867347] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=84 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=44
12.985494] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=492 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=452
13.022769] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=309 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=269
13.235863] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=492 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=452
13.486943] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=492 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=452
15.813163] ------------ cut here ]------------
15.813171] WARNING: CPU: 3 PID: 900 at ../mm/truncate.c:765 pagecache_isize_extended+0x100/0x110()
15.813173] Modules linked in: bnep bluetooth af_packet nf_log_ipv6 xt_pkttype nf_log_ipv4 nf_log_common xt_LOG xt_limit cfg80211 rfkill ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw ipt_REJECT iptable_raw xt_CT iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables cx88_blackbird cx2341x cx22702 cx88_dvb videobuf_dvb cx88_vp3054_i2c dvb_core wm8775 tuner_simple tuner_types mxm_wmi tda9887 nls_iso8859_1 tda8290 nls_cp437 vfat fat tuner fuse kvm_amd kvm uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core serio_raw snd_usb_audio pcspkr snd_usbmidi_lib k10temp edac_core edac_mce_amd snd_emu10k1 snd_util_mem snd_rawmidi snd_seq_device snd_ac97_codec
15.813204] snd_hda_codec_hdmi cx8802 snd_hda_intel cx88_alsa cx8800 cx88xx btcx_risc tveeprom videobuf_dma_sg rc_core v4l2_common videodev videobuf_core snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_timer snd emu10k1_gp gameport ac97_bus sp5100_tco i2c_piix4 tg3 ptp pps_core libphy xhci_pci xhci_hcd soundcore 8250_fintek acpi_cpufreq wmi button shpchp processor dm_mod efivarfs xfs libcrc32c uas usb_storage firewire_ohci firewire_core crc_itu_t radeon ohci_pci i2c_algo_bit drm_kms_helper sr_mod ttm cdrom drm sg
15.813229] CPU: 3 PID: 900 Comm: NetworkManager Tainted: G W 3.18.0-rc3-6-desktop #1
15.813231] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./990FX Extreme4, BIOS P2.70 06/05/2014
15.813233] 0000000000000000 0000000000000009 ffffffff8165830d 0000000000000000
15.813235] ffffffff81060827 0000000000001000 ffff8800a91bb5a8 0000000000000000
15.813236] 000000000000057d 0000000000000000 ffffffff8116a630 0000000000000001
15.813238] Call Trace:
15.813249] <ffffffff810053be>] dump_trace+0x8e/0x350
15.813252] <ffffffff81005726>] show_stack_log_lvl+0xa6/0x190
15.813255] <ffffffff81006ea1>] show_stack+0x21/0x50
15.813259] <ffffffff8165830d>] dump_stack+0x49/0x6a
15.813263] <ffffffff81060827>] warn_slowpath_common+0x77/0x90
15.813267] <ffffffff8116a630>] pagecache_isize_extended+0x100/0x110
15.813271] <ffffffff8116b2a6>] truncate_setsize+0x26/0x40
15.813310] <ffffffffa033c4d5>] xfs_setattr_size+0x165/0x3e0 [xfs]
15.813329] <ffffffffa03316cb>] xfs_file_fallocate+0x2bb/0x2e0 [xfs]
15.813334] <ffffffff811ca9d1>] do_fallocate+0x121/0x1c0
15.813337] <ffffffff811caaaf>] SyS_fallocate+0x3f/0x70
15.813341] <ffffffff8165ee2d>] system_call_fastpath+0x16/0x1b
15.813346] <00007fd0281cb8f0>] 0x7fd0281cb8f0
15.813347] --- end trace ec4f37abdf1e1eb8 ]---
43.013882] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=84 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=44
75.039236] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=84 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=44
139.104092] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=84 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=44
267.180784] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=84 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=44
523.251150] SFW2-INext-DROP-DEFLT IN=enp4s0 OUT= MAC= SRC=fe80:0000:0000:0000:be5f:f4ff:fe67:5934 DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=84 TC=0 HOPLIMIT=255 FLOWLBL=0 PROTO=UDP SPT=5353 DPT=5353 LEN=44