Re: [PATCH v2 2/7] dax: change bdev_dax_supported() to support boolean returns
From: Dave Chinner
Date: Sun Jun 03 2018 - 20:27:50 EST
On Mon, Jun 04, 2018 at 08:20:38AM +1000, Dave Chinner wrote:
> On Thu, May 31, 2018 at 09:02:52PM -0700, Dan Williams wrote:
> > On Thu, May 31, 2018 at 7:24 PM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
> > > On Thu, May 31, 2018 at 06:57:33PM -0700, Dan Williams wrote:
> > >> > FWIW, XFS+DAX used to just work on this setup (I hadn't even
> > >> > installed ndctl until this morning!) but after changing the kernel
> > >> > it no longer works. That would make it a regression, yes?
>
> [....]
>
> > >> I suspect your kernel does not have CONFIG_ZONE_DEVICE enabled which
> > >> has the following dependencies:
> > >>
> > >> depends on MEMORY_HOTPLUG
> > >> depends on MEMORY_HOTREMOVE
> > >> depends on SPARSEMEM_VMEMMAP
> > >
> > > Filesystem DAX now has a dependency on memory hotplug?
>
> [....]
>
> > > OK, works now I've found the magic config incantantions to turn
> > > everything I now need on.
>
> By enabling these options, my test VM now has a ~30s pause in the
> boot very soon after the nvdimm subsystem is initialised.
>
> [ 1.523718] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> [ 1.550353] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
> [ 1.552175] Non-volatile memory driver v1.3
> [ 2.332045] tsc: Refined TSC clocksource calibration: 2199.909 MHz
> [ 2.333280] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x1fb5dcd4620, max_idle_ns: 440795264143 ns
> [ 37.217453] brd: module loaded
> [ 37.225423] loop: module loaded
> [ 37.228441] virtio_blk virtio2: [vda] 10485760 512-byte logical blocks (5.37 GB/5.00 GiB)
> [ 37.245418] virtio_blk virtio3: [vdb] 146800640 512-byte logical blocks (75.2 GB/70.0 GiB)
> [ 37.255794] virtio_blk virtio4: [vdc] 1073741824000 512-byte logical blocks (550 TB/500 TiB)
> [ 37.265403] nd_pmem namespace1.0: unable to guarantee persistence of writes
> [ 37.265618] nd_pmem namespace0.0: unable to guarantee persistence of writes
>
> The system does not appear to be consuming CPU, but it is blocking
> NMIs so I can't get a CPU trace. For a VM that I rely on booting in
> a few seconds because I reboot it tens of times a day, this is a
> problem....
And when I turn on KASAN, the kernel fails to boot to a login prompt
because:
[ 15.363583] Non-volatile memory driver v1.3
[ 22.286787] brd: module loaded
[ 22.347054] loop: module loaded
[ 22.352158] virtio_blk virtio2: [vda] 10485760 512-byte logical blocks (5.37 GB/5.00 GiB)
[ 22.373921] virtio_blk virtio3: [vdb] 146800640 512-byte logical blocks (75.2 GB/70.0 GiB)
[ 22.394363] virtio_blk virtio4: [vdc] 1073741824000 512-byte logical blocks (550 TB/500 TiB)
[ 22.410145] Loading iSCSI transport class v2.0-870.
[ 22.411506] nd_pmem namespace0.0: unable to guarantee persistence of writes
[ 22.412777] iscsi: registered transport (tcp)
[ 22.412780] megaraid cmm: 2.20.2.7 (Release Date: Sun Jul 16 00:01:03 EST 2006)
[ 22.412806] nd_pmem namespace1.0: unable to guarantee persistence of writes
[ 22.413090] megaraid: 2.20.5.1 (Release Date: Thu Nov 16 15:32:35 EST 2006)
[ 22.421485] kworker/u33:4 (1087) used greatest stack depth: 27704 bytes left
[ 22.430664] scsi host0: ata_piix
[ 22.711000] BUG: unable to handle kernel paging request at ffffed0078000000
[ 22.712225] PGD 13ffd1067 P4D 13ffd1067 PUD 1247d2067 PMD 0
[ 22.713180] Oops: 0000 [#1] PREEMPT SMP KASAN
[ 22.713884] CPU: 8 PID: 168 Comm: kworker/u33:3 Not tainted 4.17.0-rc7-dgc+ #549
[ 22.714480] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 22.714480] Workqueue: events_unbound async_run_entry_fn
[ 22.714480] RIP: 0010:check_memory_region+0xdd/0x190
[ 22.714480] RSP: 0000:ffff88007a1aec08 EFLAGS: 00010202
[ 22.714480] RAX: ffffed0078000000 RBX: ffff8803c0000fff RCX: ffffffff81d41a12
[ 22.714480] RDX: 0000000000000000 RSI: 0000000000001000 RDI: ffff8803c0000000
[ 22.714480] RBP: ffffed0078000200 R08: 0000000000000200 R09: 0000000000000040
[ 22.714480] R10: 0000000000000200 R11: ffffed00780001ff R12: ffff8803c0000000
[ 22.714480] R13: 000000000192f3f0 R14: 0000000000000000 R15: 0000000000000000
[ 22.714480] FS: 0000000000000000(0000) GS:ffff88007f700000(0000) knlGS:0000000000000000
[ 22.714480] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 22.714480] CR2: ffffed0078000000 CR3: 000000000300f001 CR4: 00000000000606e0
[ 22.714480] Call Trace:
[ 22.714480] memcpy+0x1f/0x50
[ 22.714480] pmem_do_bvec+0x182/0x350
[ 22.714480] ? pmem_release_queue+0x10/0x10
[ 22.714480] ? __blkdev_get+0x484/0x7b0
[ 22.714480] ? blkdev_get+0x1e6/0x4f0
[ 22.714480] ? __device_add_disk+0x62a/0x780
[ 22.714480] ? pmem_attach_disk+0x580/0x7b0
[ 22.714480] ? do_raw_spin_unlock+0xa4/0x130
[ 22.714480] ? _raw_spin_unlock+0xa/0x20
[ 22.714480] ? create_task_io_context+0x195/0x1d0
[ 22.714480] ? generic_make_request_checks+0x33a/0x7a0
[ 22.714480] pmem_make_request+0x1d9/0x3c0
[ 22.714480] generic_make_request+0x2d8/0x6c0
[ 22.714480] ? blk_plug_queued_count+0xb0/0xb0
[ 22.714480] ? memset+0x1f/0x40
[ 22.714480] ? submit_bio+0xc8/0x1e0
[ 22.714480] submit_bio+0xc8/0x1e0
[ 22.714480] ? direct_make_request+0x150/0x150
[ 22.714480] ? alloc_buffer_head+0x3c/0x80
[ 22.714480] ? alloc_page_buffers+0x7f/0x120
[ 22.714480] ? __rcu_read_unlock+0x66/0x80
[ 22.714480] ? guard_bio_eod+0xa9/0x1e0
[ 22.714480] submit_bh_wbc.isra.41+0x257/0x280
[ 22.714480] ? end_buffer_read_nobh+0x10/0x10
[ 22.714480] block_read_full_page+0x307/0x470
[ 22.714480] ? block_llseek+0x80/0x80
[ 22.714480] ? block_page_mkwrite+0x150/0x150
[ 22.714480] ? add_to_page_cache_lru+0xd7/0x160
[ 22.714480] ? add_to_page_cache_locked+0x10/0x10
[ 22.714480] ? policy_node+0x56/0x60
[ 22.714480] do_read_cache_page+0x3e3/0x730
[ 22.714480] ? bus_probe_device+0xf3/0x120
[ 22.714480] ? async_run_entry_fn+0x75/0x1e0
[ 22.714480] ? blkdev_writepages+0x10/0x10
[ 22.714480] ? filemap_fault+0x940/0x940
[ 22.714480] ? unwind_next_frame+0x8cf/0x940
[ 22.714480] ? stack_access_ok+0x35/0x80
[ 22.714480] ? __alloc_pages_nodemask+0x18e/0x320
[ 22.714480] ? __alloc_pages_slowpath+0x12b0/0x12b0
[ 22.714480] read_dev_sector+0x61/0x120
[ 22.753746] scsi host1: ata_piix
[ 22.753296] read_lba+0x260/0x2d0
[ 22.753296] ? sgi_partition+0x3c0/0x3c0
[ 22.755203] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc100 irq 14
[ 22.753296] ? do_raw_spin_unlock+0xa4/0x130
[ 22.756637] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc108 irq 15
[ 22.753296] ? is_gpt_valid.part.5+0x3c0/0x3c0
[ 22.758498] efi_partition+0x252/0xb40
[ 22.758498] ? __inc_numa_state+0x19/0x90
[ 22.758498] ? kasan_unpoison_shadow+0x30/0x40
[ 22.758498] ? vzalloc+0x58/0x60
[ 22.758498] ? rescan_partitions+0x133/0x510
[ 22.758498] ? is_gpt_valid.part.5+0x3c0/0x3c0
[ 22.758498] ? kasan_unpoison_shadow+0x30/0x40
[ 22.764064] ? get_page_from_freelist+0x16dd/0x1a50
[ 22.764064] ? widen_string+0x25/0x100
[ 22.766067] ? widen_string+0x25/0x100
[ 22.766282] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
[ 22.766575] ? string+0xc4/0xf0
[ 22.766575] ? format_decode+0x79/0x4b0
[ 22.766575] ? memcpy+0x34/0x50
[ 22.770062] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 22.766575] ? vsnprintf+0xf2/0x7d0
[ 22.771264] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 22.766575] ? num_to_str+0x160/0x160
[ 22.772750] ? __might_sleep+0x31/0xd0
[ 22.773202] mousedev: PS/2 mouse device common for all mice
[ 22.772750] ? snprintf+0x8f/0xc0
[ 22.772750] ? vscnprintf+0x30/0x30
[ 22.772750] ? is_gpt_valid.part.5+0x3c0/0x3c0
[ 22.776149] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input1
[ 22.776242] ? check_partition+0x18f/0x310
[ 22.776717] rtc_cmos 00:00: RTC can wake from S4
[ 22.778723] rtc_cmos 00:00: registered as rtc0
[ 22.779023] check_partition+0x18f/0x310
[ 22.779023] rescan_partitions+0x133/0x510
[ 22.780706] rtc_cmos 00:00: nvmem registration failed
[ 22.779023] ? __might_sleep+0x31/0xd0
[ 22.782618] rtc_cmos 00:00: alarms up to one day, y3k, 114 bytes nvram, hpet irqs
[ 22.779023] ? kmem_cache_alloc+0xdd/0x5b0
[ 22.779023] ? ___might_sleep+0x7c/0x1a0
[ 22.786069] ? bd_set_size+0x104/0x160
[ 22.786069] __blkdev_get+0x484/0x7b0
[ 22.786069] ? bd_set_size+0x160/0x160
[ 22.786069] ? map_id_range_down+0x150/0x170
[ 22.788981] device-mapper: ioctl: 4.39.0-ioctl (2018-04-03) initialised: dm-devel@xxxxxxxxxx
[ 22.786069] ? free_user_ns+0x170/0x170
[ 22.789183] blkdev_get+0x1e6/0x4f0
[ 22.789183] ? __raw_spin_lock_init+0x42/0x50
[ 22.789183] ? __wake_up_bit+0x78/0xc0
[ 22.792867] device-mapper: raid: Loading target version 1.13.2
[ 22.789183] ? __blkdev_get+0x7b0/0x7b0
[ 22.789183] ? refcount_sub_and_test+0xa7/0x120
[ 22.789183] ? refcount_inc+0x30/0x30
[ 22.795220] ? do_raw_spin_lock+0x9b/0x130
[ 22.795991] hidraw: raw HID events driver (C) Jiri Kosina
[ 22.796068] ? do_raw_spin_unlock+0xa4/0x130
[ 22.796068] ? kobject_put+0x2d/0x100
[ 22.796068] __device_add_disk+0x62a/0x780
[ 22.796068] ? bdget_disk+0x50/0x50
[ 22.796068] ? alloc_dax+0x222/0x2e0
[ 22.800041] ? kill_dax+0xc0/0xc0
[ 22.800041] ? mutex_lock+0x2a/0x50
[ 22.800041] ? nvdimm_badblocks_populate+0x56/0x1d0
[ 22.800041] ? __raw_spin_lock_init+0x42/0x50
[ 22.800041] pmem_attach_disk+0x580/0x7b0
[ 22.803358] oprofile: using NMI interrupt.
[ 22.800041] ? nd_pmem_notify+0x240/0x240
[ 22.804217] ? nd_dax_probe+0xef/0x110
[ 22.805177] NET: Registered protocol family 17
[ 22.804217] nvdimm_bus_probe+0x76/0xe0
[ 22.804217] driver_probe_device+0x31d/0x450
[ 22.806975] sctp: Hash tables configured (bind 128/128)
[ 22.804217] ? __driver_attach+0xd0/0xd0
[ 22.808773] Key type dns_resolver registered
[ 22.804217] bus_for_each_drv+0xd8/0x130
[ 22.809534] Key type ceph registered
[ 22.804217] ? subsys_find_device_by_id+0x1e0/0x1e0
[ 22.804217] ? do_raw_spin_unlock+0xa4/0x130
[ 22.811472] __device_attach+0x14d/0x1b0
[ 22.812223] ? device_bind_driver+0x70/0x70
[ 22.812768] libceph: loaded (mon/osd proto 15/24)
[ 22.812223] ? kobject_uevent_env+0x15d/0x7f0
[ 22.812223] bus_probe_device+0xf3/0x120
[ 22.812223] device_add+0x696/0xa20
[ 22.812223] ? device_private_init+0xc0/0xc0
[ 22.816158] ? __wake_up_common_lock+0xcb/0x110
[ 22.816158] ? __wake_up_common+0x240/0x240
[ 22.816158] ? nd_async_device_unregister+0x30/0x30
[ 22.816158] nd_async_device_register+0xe/0x40
[ 22.816158] async_run_entry_fn+0x75/0x1e0
[ 22.819536] process_one_work+0x349/0x6d0
[ 22.819536] worker_thread+0x74/0x5c0
[ 22.819536] ? process_one_work+0x6d0/0x6d0
[ 22.819536] kthread+0x1b7/0x1e0
[ 22.819536] ? __kthread_bind_mask+0x70/0x70
[ 22.819536] ret_from_fork+0x24/0x30
[ 22.819536] Code: 01 74 0b 41 80 38 00 74 f0 4d 85 c0 75 56 4c 01 c8 49 89 e8 49 29 c0 4d 8d 48 07 4d 85 c0 4d 0f 49 c8 49 c1 f9 03 45 85 c9 74 5b <48> 83 38 00 75 18 45 8d 41 ff 4e 8d 44 c0 08 48 8
[ 22.819536] RIP: check_memory_region+0xdd/0x190 RSP: ffff88007a1aec08
[ 22.819536] CR2: ffffed0078000000
[ 22.819536] ---[ end trace 2d3ad661d958a6e8 ]---
[ 22.819536] BUG: sleeping function called from invalid context at ./include/linux/percpu-rwsem.h:34
[ 22.819536] in_atomic(): 1, irqs_disabled(): 1, pid: 168, name: kworker/u33:3
[ 22.819536] CPU: 8 PID: 168 Comm: kworker/u33:3 Tainted: G B D 4.17.0-rc7-dgc+ #549
[ 22.819536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 22.819536] Workqueue: events_unbound async_run_entry_fn
[ 22.819536] Call Trace:
[ 22.819536] dump_stack+0x9a/0xeb
[ 22.819536] ___might_sleep+0x169/0x1a0
[ 22.819536] exit_signals+0x67/0x310
[ 22.819536] ? get_signal+0x860/0x860
[ 22.819536] ? __wake_up_common+0x240/0x240
[ 22.819536] ? nd_async_device_unregister+0x30/0x30
[ 22.819536] ? blocking_notifier_call_chain+0x24/0x70
[ 22.819536] do_exit+0x14d/0x1370
[ 22.819536] ? is_current_pgrp_orphaned+0x60/0x60
[ 22.819536] ? worker_thread+0x74/0x5c0
[ 22.819536] ? process_one_work+0x6d0/0x6d0
[ 22.819536] ? kthread+0x1b7/0x1e0
[ 22.819536] rewind_stack_do_exit+0x17/0x20
[ 22.819536] ==================================================================
[ 22.819536] BUG: KASAN: stack-out-of-bounds in widen_string+0x25/0x100
[ 22.819536] Read of size 8 at addr ffff88007a1afae0 by task kworker/u33:3/168
[ 22.819536]
[ 22.819536] CPU: 8 PID: 168 Comm: kworker/u33:3 Tainted: G D 4.17.0-rc7-dgc+ #549
[ 22.819536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 22.819536] Workqueue: events_unbound async_run_entry_fn
[ 22.819536] Call Trace:
[ 22.819536] dump_stack+0x9a/0xeb
[ 22.819536] ? widen_string+0x25/0x100
[ 22.819536] print_address_description+0x7e/0x290
[ 22.819536] ? widen_string+0x25/0x100
[ 22.819536] kasan_report+0x237/0x360
[ 22.819536] widen_string+0x25/0x100
[ 22.819536] string+0xc4/0xf0
[ 22.819536] vsnprintf+0x2a8/0x7d0
[ 22.819536] ? num_to_str+0x160/0x160
[ 22.819536] ? subsys_find_device_by_id+0x1e0/0x1e0
[ 22.819536] ? do_raw_spin_unlock+0xa4/0x130
[ 22.819536] vscnprintf+0x9/0x30
[ 22.819536] vprintk_emit+0x86/0x400
[ 22.819536] printk+0x94/0xb0
[ 22.819536] ? cpumask_weight.constprop.27+0x1e/0x1e
[ 22.819536] ? bus_probe_device+0xf3/0x120
[ 22.819536] ? ___might_sleep+0xa7/0x1a0
[ 22.819536] ___might_sleep+0xee/0x1a0
[ 22.819536] exit_signals+0x67/0x310
[ 22.819536] ? get_signal+0x860/0x860
[ 22.819536] ? __wake_up_common+0x240/0x240
[ 22.819536] ? nd_async_device_unregister+0x30/0x30
[ 22.819536] ? blocking_notifier_call_chain+0x24/0x70
[ 22.819536] do_exit+0x14d/0x1370
[ 22.819536] ? is_current_pgrp_orphaned+0x60/0x60
[ 22.819536] ? worker_thread+0x74/0x5c0
[ 22.819536] ? process_one_work+0x6d0/0x6d0
[ 22.819536] ? kthread+0x1b7/0x1e0
[ 22.819536] rewind_stack_do_exit+0x17/0x20
[ 22.819536]
[ 22.819536] The buggy address belongs to the page:
[ 22.819536] page:ffffea0001ab5e48 count:0 mapcount:0 mapping:0000000000000000 index:0x0
[ 22.819536] flags: 0xfffffc0000000()
[ 22.819536] raw: 000fffffc0000000 0000000000000000 0000000000000000 00000000ffffffff
[ 22.819536] raw: ffffea0001ab5e68 ffffea0001ab5e68 0000000000000000
[ 22.819536] page dumped because: kasan: bad access detected
[ 22.819536]
[ 22.819536] Memory state around the buggy address:
[ 22.819536] ffff88007a1af980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.819536] ffff88007a1afa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1
[ 22.819536] >ffff88007a1afa80: f1 f1 f1 00 00 00 00 00 00 00 00 f3 f3 f3 f3 00
[ 22.819536] ^
[ 22.819536] ffff88007a1afb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.819536] ffff88007a1afb80: 00 00 f1 f1 f1 f1 00 f2 f2 f2 f3 f3 f3 f3 f3 f3
[ 22.819536] ==================================================================
[ 22.882914] hpet1: lost 5 rtc interrupts
[ 22.883636] note: kworker/u33:3[168] exited with preempt_count 1
[ 22.885240] kworker/u33:3 (168) used greatest stack depth: 24768 bytes left
[ 22.887136] BUG: unable to handle kernel paging request at ffffed00c0000000
[ 22.888327] PGD 13ffd1067 P4D 13ffd1067 PUD 0
[ 22.889043] Oops: 0000 [#2] PREEMPT SMP KASAN
[ 22.889747] CPU: 12 PID: 159 Comm: kworker/u33:2 Tainted: G B D W 4.17.0-rc7-dgc+ #549
[ 22.890253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 22.890253] Workqueue: events_unbound async_run_entry_fn
[ 22.890253] RIP: 0010:check_memory_region+0xdd/0x190
[ 22.890253] RSP: 0000:ffff88007a16ec08 EFLAGS: 00010202
[ 22.890253] RAX: ffffed00c0000000 RBX: ffff880600000fff RCX: ffffffff81d41a12
[ 22.890253] RDX: 0000000000000000 RSI: 0000000000001000 RDI: ffff880600000000
[ 22.890253] RBP: ffffed00c0000200 R08: 0000000000000200 R09: 0000000000000040
[ 22.890253] R10: 0000000000000200 R11: ffffed00c00001ff R12: ffff880600000000
[ 22.890253] R13: 0000000001927f90 R14: 0000000000000000 R15: 0000000000000000
[ 22.890253] FS: 0000000000000000(0000) GS:ffff88007f780000(0000) knlGS:0000000000000000
[ 22.890253] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 22.890253] CR2: ffffed00c0000000 CR3: 000000000300f001 CR4: 00000000000606e0
[ 22.890253] Call Trace:
[ 22.890253] memcpy+0x1f/0x50
[ 22.890253] pmem_do_bvec+0x182/0x350
[ 22.890253] ? pmem_release_queue+0x10/0x10
[ 22.890253] ? blkdev_get+0x1e6/0x4f0
[ 22.890253] ? __device_add_disk+0x62a/0x780
[ 22.890253] ? pmem_attach_disk+0x580/0x7b0
[ 22.890253] ? do_raw_spin_unlock+0xa4/0x130
[ 22.890253] ? _raw_spin_unlock+0xa/0x20
[ 22.890253] ? create_task_io_context+0x195/0x1d0
[ 22.890253] ? generic_make_request_checks+0x33a/0x7a0
[ 22.890253] pmem_make_request+0x1d9/0x3c0
[ 22.890253] generic_make_request+0x2d8/0x6c0
[ 22.890253] ? blk_plug_queued_count+0xb0/0xb0
[ 22.890253] ? memset+0x1f/0x40
[ 22.890253] ? submit_bio+0xc8/0x1e0
[ 22.890253] submit_bio+0xc8/0x1e0
[ 22.890253] ? direct_make_request+0x150/0x150
[ 22.890253] ? alloc_buffer_head+0x3c/0x80
[ 22.890253] ? alloc_page_buffers+0x7f/0x120
[ 22.890253] ? __rcu_read_unlock+0x66/0x80
[ 22.917466] ata2.01: NODEV after polling detection
[ 22.890253] ? guard_bio_eod+0xa9/0x1e0
[ 22.919184] ata1.01: NODEV after polling detection
[ 22.890253] submit_bh_wbc.isra.41+0x257/0x280
[ 22.920719] ata2.00: ATAPI: QEMU DVD-ROM, 2.5+, max UDMA/100
[ 22.890253] ? end_buffer_read_nobh+0x10/0x10
[ 22.922324] ata1.00: ATA-7: QEMU HARDDISK, 2.5+, max UDMA/100
[ 22.890253] block_read_full_page+0x307/0x470
[ 22.923573] ata1.00: 20971520 sectors, multi 16: LBA48
[ 22.890253] ? block_llseek+0x80/0x80
[ 22.890253] ? block_page_mkwrite+0x150/0x150
[ 22.890253] ? add_to_page_cache_lru+0xd7/0x160
[ 22.890253] ? add_to_page_cache_locked+0x10/0x10
[ 22.890253] ? policy_node+0x56/0x60
[ 22.926515] ata2.00: configured for MWDMA2
[ 22.890253] do_read_cache_page+0x3e3/0x730
[ 22.927886] ata1.00: configured for MWDMA2
[ 22.890253] ? bus_probe_device+0xf3/0x120
[ 22.890253] ? async_run_entry_fn+0x75/0x1e0
[ 22.890253] ? blkdev_writepages+0x10/0x10
[ 22.890253] ? filemap_fault+0x940/0x940
[ 22.890253] ? unwind_next_frame+0x8cf/0x940
[ 22.890253] ? stack_access_ok+0x35/0x80
[ 22.890253] ? deref_stack_reg+0x7f/0xb0
[ 22.890253] ? __read_once_size_nocheck.constprop.6+0x10/0x10
[ 22.890253] ? unwind_get_return_address_ptr+0x50/0x50
[ 22.890253] ? save_stack+0x89/0xb0
[ 22.890253] ? __orc_find+0x6b/0xc0
[ 22.890253] ? unwind_next_frame+0xc8/0x940
[ 22.890253] read_dev_sector+0x61/0x120
[ 22.890253] read_lba+0x260/0x2d0
[ 22.890253] ? sgi_partition+0x3c0/0x3c0
[ 22.890253] ? __save_stack_trace+0x73/0xd0
[ 22.890253] ? is_gpt_valid.part.5+0x3c0/0x3c0
[ 22.890253] efi_partition+0x252/0xb40
[ 22.890253] ? __inc_numa_state+0x19/0x90
[ 22.890253] ? kasan_unpoison_shadow+0x30/0x40
[ 22.890253] ? is_gpt_valid.part.5+0x3c0/0x3c0
[ 22.890253] ? kasan_unpoison_shadow+0x30/0x40
[ 22.890253] ? get_page_from_freelist+0x16dd/0x1a50
[ 22.890253] ? widen_string+0x25/0x100
[ 22.890253] ? widen_string+0x25/0x100
[ 22.890253] ? string+0xc4/0xf0
[ 22.890253] ? format_decode+0x79/0x4b0
[ 22.890253] ? memcpy+0x34/0x50
[ 22.890253] ? vsnprintf+0xf2/0x7d0
[ 22.890253] ? num_to_str+0x160/0x160
[ 22.890253] ? __might_sleep+0x31/0xd0
[ 22.890253] ? snprintf+0x8f/0xc0
[ 22.890253] ? vscnprintf+0x30/0x30
[ 22.890253] ? is_gpt_valid.part.5+0x3c0/0x3c0
[ 22.890253] ? check_partition+0x18f/0x310
[ 22.890253] check_partition+0x18f/0x310
[ 22.890253] rescan_partitions+0x133/0x510
[ 22.890253] ? __might_sleep+0x31/0xd0
[ 22.890253] ? ___might_sleep+0x7c/0x1a0
[ 22.890253] ? bd_set_size+0x104/0x160
[ 22.890253] __blkdev_get+0x484/0x7b0
[ 22.890253] ? __raw_spin_lock_init+0x42/0x50
[ 22.890253] ? bd_set_size+0x160/0x160
[ 22.890253] ? map_id_range_down+0x150/0x170
[ 22.890253] ? free_user_ns+0x170/0x170
[ 22.890253] blkdev_get+0x1e6/0x4f0
[ 22.890253] ? __raw_spin_lock_init+0x42/0x50
[ 22.890253] ? __wake_up_bit+0x78/0xc0
[ 22.890253] ? __blkdev_get+0x7b0/0x7b0
[ 22.890253] ? refcount_sub_and_test+0xa7/0x120
[ 22.890253] ? refcount_inc+0x30/0x30
[ 22.890253] ? do_raw_spin_lock+0x9b/0x130
[ 22.890253] ? do_raw_spin_unlock+0xa4/0x130
[ 22.890253] ? kobject_put+0x2d/0x100
[ 22.890253] __device_add_disk+0x62a/0x780
[ 22.890253] ? bdget_disk+0x50/0x50
[ 22.890253] ? alloc_dax+0x222/0x2e0
[ 22.890253] ? kill_dax+0xc0/0xc0
[ 22.890253] ? mutex_lock+0x2a/0x50
[ 22.890253] ? nvdimm_badblocks_populate+0x56/0x1d0
[ 22.890253] ? __raw_spin_lock_init+0x42/0x50
[ 22.890253] pmem_attach_disk+0x580/0x7b0
[ 22.890253] ? nd_pmem_notify+0x240/0x240
[ 22.890253] ? nd_dax_probe+0xef/0x110
[ 22.890253] nvdimm_bus_probe+0x76/0xe0
[ 22.890253] driver_probe_device+0x31d/0x450
[ 22.890253] ? __driver_attach+0xd0/0xd0
[ 22.890253] bus_for_each_drv+0xd8/0x130
[ 22.890253] ? subsys_find_device_by_id+0x1e0/0x1e0
[ 22.890253] ? do_raw_spin_unlock+0xa4/0x130
[ 22.890253] __device_attach+0x14d/0x1b0
[ 22.890253] ? device_bind_driver+0x70/0x70
[ 22.890253] ? kobject_uevent_env+0x15d/0x7f0
[ 22.890253] bus_probe_device+0xf3/0x120
[ 22.890253] device_add+0x696/0xa20
[ 22.890253] ? device_private_init+0xc0/0xc0
[ 22.890253] ? finish_task_switch+0xf8/0x3c0
[ 22.890253] ? nd_async_device_unregister+0x30/0x30
[ 22.890253] nd_async_device_register+0xe/0x40
[ 22.890253] async_run_entry_fn+0x75/0x1e0
[ 22.890253] process_one_work+0x349/0x6d0
[ 22.890253] worker_thread+0x74/0x5c0
[ 22.890253] ? process_one_work+0x6d0/0x6d0
[ 22.890253] kthread+0x1b7/0x1e0
[ 22.890253] ? __kthread_bind_mask+0x70/0x70
[ 22.890253] ret_from_fork+0x24/0x30
[ 22.890253] Code: 01 74 0b 41 80 38 00 74 f0 4d 85 c0 75 56 4c 01 c8 49 89 e8 49 29 c0 4d 8d 48 07 4d 85 c0 4d 0f 49 c8 49 c1 f9 03 45 85 c9 74 5b <48> 83 38 00 75 18 45 8d 41 ff 4e 8d 44 c0 08 48 8
[ 22.890253] RIP: check_memory_region+0xdd/0x190 RSP: ffff88007a16ec08
[ 22.890253] CR2: ffffed00c0000000
[ 22.890253] ---[ end trace 2d3ad661d958a6e9 ]---
-Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx