Is there a tutorial available on how to bisect the kernel and install and test the bisected version?
To me it seems the problem only occurs in connection with NFS. I could not reproduce the problem when NFS is not used. However, after reading data from NFS mounts the problem reliably occurs within a few minutes.
Is there a tutorial available on how to bisect the kernel and install and test the bisected version?
To me it seems the problem only occurs in connection with NFS. I could not reproduce the problem when NFS is not used. However, after reading data from NFS mounts the problem reliably occurs within a few minutes.
Here's a log from a third machine: cache_alloc+ 0x7e/0x230 60b7c8 EFLAGS: 00010282 0(0000) GS:ffff9d954da8 0000(0000) knlGS:000000000 0000000 alloc_slab+ 0x17/0x20 alloc_slab+ 0x17/0x20 alloc+0x64/ 0x180 entity+ 0x96/0xa0 alloc+0x4f/ 0x60 table+0x10b/ 0x170 table_chained+ 0x47/0xa0 io+0x52/ 0x180 read_write_ cmnd+0x67/ 0x710 command+ 0x11a/0x472 rq+0x32e/ 0xa00 dispatch_ rq_list+ 0x96/0x5a0 remove_ request+ 0x4e/0xb0 request+ 0x1/0x1f0 do_dispatch_ sched+0x67/ 0x100 sched_dispatch_ requests+ 0x12d/0x180 run_hw_ queue+0x5a/ 0x110 delay_run_ hw_queue+ 0x15b/0x160 run_hw_ queue+0x92/ 0x120 sched_insert_ requests+ 0x74/0x100 flush_plug_ list+0x1e8/ 0x290 plug_list+ 0xe3/0x110 plug+0x26/ 0x34 commit_ transaction+ 0xda5/0x17e8 0xb6/0x280 0x80/0x80 timeout+ 0x20/0x20 park+0x90/ 0x90 fork+0x35/ 0x40 temp_thermal nls_iso8859_1 intel_powerclamp mei_hdcp snd_hda_ codec_realtek snd_hda_ codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg coretemp snd_hda_codec snd_hda_core kvm_intel snd_hwdep snd_pcm kvm snd_seq_midi radeon snd_seq_midi_event snd_rawmidi snd_seq crct10dif_pclmul ghash_clmulni_intel ttm snd_seq_device snd_timer aesni_intel drm_kms_helper crypto_simd snd cryptd i2c_algo_bit glue_helper fb_sys_fops syscopyarea mei_me intel_cstate sysfillrect mei sysimgblt intel_rapl_perf soundcore mac_hid nf_log_ipv6 ip6t_REJECT nf_reject_ipv6 xt_hl ip6t_rt
[ 359.319126] BUG: unable to handle page fault for address: ffff9d95f6147697
[ 359.319132] #PF: supervisor read access in kernel mode
[ 359.319134] #PF: error_code(0x0000) - not-present page
[ 359.319136] PGD 378401067 P4D 378401067 PUD 0
[ 359.319141] Oops: 0000 [#1] SMP PTI
[ 359.319146] CPU: 2 PID: 321 Comm: jbd2/sda6-8 Tainted: G OE 5.4.0-40-generic #44-Ubuntu
[ 359.319148] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./B85M Pro4, BIOS P2.50 12/11/2015
[ 359.319154] RIP: 0010:kmem_
[ 359.319158] Code: 99 01 00 00 4d 8b 07 65 49 8b 50 08 65 4c 03 05 40 9d 56 4a 4d 8b 20 4d 85 e4 0f 84 85 01 00 00 41 8b 47 20 49 8b 3f 4c 01 e0 <48> 8b 18 48 89 c1 49 33 9f 70 01 00 00 4c 89 e0 48 0f c9 48 31 cb
[ 359.319161] RSP: 0018:ffffa89840
[ 359.319163] RAX: ffff9d95f6147697 RBX: 0000000000000000 RCX: 0000000000000001
[ 359.319165] RDX: 0000000000000019 RSI: 0000000000092a20 RDI: 0000000000031f90
[ 359.319167] RBP: ffffa8984060b7f8 R08: ffff9d954dab1f90 R09: ffff9d953f8132b8
[ 359.319169] R10: ffff9d953f8276c8 R11: 0000000000000029 R12: ffff9d95f6147697
[ 359.319171] R13: 0000000000092a20 R14: ffff9d954ada4380 R15: ffff9d954ada4380
[ 359.319174] FS: 000000000000000
[ 359.319176] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 359.319178] CR2: ffff9d95f6147697 CR3: 0000000377a0a002 CR4: 00000000001606e0
[ 359.319180] Call Trace:
[ 359.319187] ? mempool_
[ 359.319192] mempool_
[ 359.319196] mempool_
[ 359.319201] ? __enqueue_
[ 359.319206] sg_pool_
[ 359.319211] __sg_alloc_
[ 359.319214] sg_alloc_
[ 359.319217] ? mac_pton+0xb0/0xb0
[ 359.319222] scsi_init_
[ 359.319227] sd_setup_
[ 359.319231] sd_init_
[ 359.319235] scsi_queue_
[ 359.319239] blk_mq_
[ 359.319243] ? deadline_
[ 359.319246] ? dd_dispatch_
[ 359.319250] blk_mq_
[ 359.319254] blk_mq_
[ 359.319259] __blk_mq_
[ 359.319263] __blk_mq_
[ 359.319267] blk_mq_
[ 359.319270] blk_mq_
[ 359.319273] blk_mq_
[ 359.319277] blk_flush_
[ 359.319280] blk_finish_
[ 359.319287] jbd2_journal_
[ 359.319293] kjournald2+
[ 359.319297] ? wait_woken+
[ 359.319301] kthread+0x104/0x140
[ 359.319304] ? commit_
[ 359.319307] ? kthread_
[ 359.319312] ret_from_
[ 359.319315] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache rfcomm msr vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) amdgpu amd_iommu_v2 gpu_sched aufs hid_logitech_hidpp cmac algif_hash joydev algif_skcipher af_alg overlay bnep input_leds hid_logitech_dj hid_generic btusb uas btrtl intel_rapl_msr btbcm btintel usbhid bluetooth hid usb_storage ecdh_generic ecc intel_rapl_common x86_pkg_
[ 359.319364] nf_log_ipv4 nf_log_common ipt_REJECT nf_reject_ipv4 xt_LOG xt_limit xt_addrtype xt_tcpudp sch_fq_codel xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c parport_pc ip6table_filter ip6_tables ppdev iptable_filter bpfilter lp parport drm sunrpc ip_tables x_tables autofs4 crc32_pclmul e1000e ahci i2c_i801 lpc_ich libahci video
[ 359.319386] CR2: ffff9d95f6147697
[ 359.319389] ---[ end trace b059e600d0f4c10e ]---