[dm-devel] kernel oops with blk-mq-sched latest
Hannes Reinecke
hare at suse.de
Tue Jan 17 08:57:41 UTC 2017
Hi Jens,
I gave your latest patchset from
git.kernel.dk/linux-block blk-mq-sched
I see a kernel oops when shutting down:
[ 2132.708929] systemd-shutdown[1]: Detaching DM devices.
[ 2132.965107] BUG: unable to handle kernel NULL pointer dereference at
00000000
00000001
[ 2133.037182] IP: dd_merged_requests+0x6/0x60
[ 2133.077816] PGD 0
[ 2133.077818]
[ 2133.113087] Oops: 0000 [#1] SMP
[ list of modules removed ]
[ 2133.925265] CPU: 20 PID: 1 Comm: systemd-shutdow Not tainted
4.10.0-rc4+ #543
[ 2133.990034] Hardware name: HP ProLiant DL380p Gen8, BIOS P70 09/18/2013
[ 2134.050522] task: ffff88042d614040 task.stack: ffffc90003150000
[ 2134.106915] RIP: 0010:dd_merged_requests+0x6/0x60
[ 2134.150593] RSP: 0018:ffffc90003153b18 EFLAGS: 00010002
[ 2134.198740] RAX: ffffffff81cc6de0 RBX: ffff8804296d5040 RCX:
0000000000000001
[ 2134.262708] RDX: 0000000000000001 RSI: 0000000000000001 RDI:
ffff8804296d5040
[ 2134.326987] RBP: ffffc90003153b30 R08: 0000000000000000 R09:
0000000000000000
[ 2134.391054] R10: 0000000000000000 R11: 0001f8180001f815 R12:
0000000000000000
[ 2134.456095] R13: ffff8804296d5040 R14: ffff8804099801f0 R15:
0000000000000004
[ 2134.521196] FS: 00007fd64d3bf840(0000) GS:ffff88042f900000(0000)
knlGS:0000000000000000
[ 2134.595178] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2134.648637] CR2: 0000000000000001 CR3: 000000081b892000 CR4:
00000000000406e0
[ 2134.713349] Call Trace:
[ 2134.737168] ? elv_drain_elevator+0x29/0xa0
[ 2134.775821] __blk_drain_queue+0x52/0x1a0
[ 2134.812473] blk_queue_bypass_start+0x6e/0xa0
[ 2134.854009] blkcg_deactivate_policy+0x30/0xf0
[ 2134.894993] blk_throtl_exit+0x34/0x50
[ 2134.929450] blkcg_exit_queue+0x35/0x40
[ 2134.965089] blk_release_queue+0x33/0xe0
[ 2135.001364] kobject_cleanup+0x63/0x170
[ 2135.037412] kobject_put+0x25/0x50
[ 2135.068622] blk_cleanup_queue+0x198/0x260
[ 2135.107780] cleanup_mapped_device+0xb5/0xf0 [dm_mod]
[ 2135.154741] __dm_destroy+0x1a5/0x290 [dm_mod]
[ 2135.195009] dm_destroy+0x13/0x20 [dm_mod]
[ 2135.232149] dev_remove+0xde/0x120 [dm_mod]
[ 2135.270184] ? dev_suspend+0x210/0x210 [dm_mod]
[ 2135.311478] ctl_ioctl+0x20b/0x510 [dm_mod]
[ 2135.349680] ? terminate_walk+0xc3/0x140
[ 2135.385442] ? kmem_cache_free+0x10/0x260
[ 2135.422315] dm_ctl_ioctl+0x13/0x20 [dm_mod]
Known issue?
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare at suse.de +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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