Re: Bad/Unaligned block number requested

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On Tue, 8 May 2018, Coly Li wrote:

> On 2018/5/8 6:41 AM, Eric Wheeler wrote:
> > On Sun, 6 May 2018, Coly Li wrote:
> > 
> >> On 2018/5/6 3:28 AM, Eric Wheeler wrote:
> >>> On Sun, 6 May 2018, Coly Li wrote:
> >>>
> >>>> On 2018/4/27 4:32 AM, Eric Wheeler wrote:
> >>>>>> Hi Coly,
> >>>>>>
> >>>>>> I'm sure you've been busy with the v4.17 merge but I thought I 
> >>>>>> would check in:  
> >>>>>>
> >>>>>> Have you had a chance to look at this?  It is an opportunity to fix this 
> >>>>>> 4k bug for the future since we can still reproduce the error.
> >>>>>>
> >>>>>>>>> bcache: bch_count_io_errors() dm-6: IO error on reading from cache, recovering <<<
> >>>>>>
> >>>>>> What do you think, is there data corruption exposure here since 4.1.49 
> >>>>>> still has the dirty-cache-recorvery bug? 
> >>>>>
> >>>>> I just noticed that "bcache: only permit to recovery read error when cache 
> >>>>> device is clean" is in v4.1.49, but would this recover gracefully in the 
> >>>>> 4k error situation?
> >>>>>
> >>>>>> Also, would your failure-recovery patch series address this type of 
> >>>>>> failure?
> >>>>
> >>>> Hi Eric,
> >>>>
> >>>> I just find a time slot to compose a patch checking 4K alignment of I/Os
> >>>> to backing device. After testing and first glance at the messages, I
> >>>> will post it out.
> >>>>
> >>>
> >>> Thank you Coly, I appreciate your help!  
> >>
> >> Hi Eric,
> >>
> >> Please check the attached patch, it checks bcache key offset, if the
> >> offset is not 4KB aligned, a call trace will be printed out.
> >>
> >> I also run it with my own hardware, here is some information I may share.
> >>
> >> It seems bcache just tries to cache bio with any offset, no 4K alignment
> >> required. When I use fio with directIO, non-4K aligned bio can be sent
> >> into bcache code and it is just cached.
> >>
> >> I can see numerous call trace when I use directIO with 512B/1KB/2KB
> >> block size. But if I use 4KB block size in fio, or set block alignment
> >> to 4KB, no warning call trace printed, not at all.
> >>
> >> Then when I set block alignment to 2K in fio, even blocksize is 4KB,  I
> >> can see non-4k-aligned warning.
> >>
> >> Therefore I guess the most probably reason is, the upper layer code
> >> sends non-4k-aligned bio into bcache code.
> >>
> >> I also tried to set bcache block size to 4K with make-bcache -w, when
> >> fio blocksize >= 4KB, no non-4k-aligned warning. But fio does not work
> >> if its blocksize < bcache block size, I am not sure whether setting
> >> bcache block size to 4K works to your situation.
> >>
> > 
> > Hi Coly,
> > 
> > We are already running 4k blocks with bcache. We tried your new patch, but 
> > there aren't any new backtraces. This is the only information we get:
> > 
> > [ 1174.675229] sd 0:0:0:1: [sdb] Unaligned block number requested: sector_size=4096, block=15724561783, blk_rq=41
> > [ 1174.676077] sd 0:0:0:2: [sdc] Unaligned block number requested: sector_size=4096, block=353041024, blk_rq=23
> > [ 1174.676958] bcache: bch_count_io_errors() dm-6: IO error on reading from cache, recovering
> > [ 1174.710818] block drbd8065: read: error=-5 s=19281408s
> > [ 1174.711654] block drbd8065: Local IO failed in drbd_endio_read_sec_final.
> > [ 1175.278348] sd 0:0:0:1: [sdb] Unaligned block number requested: sector_size=4096, block=15725385535, blk_rq=97
> > [ 1175.279612] sd 0:0:0:2: [sdc] Unaligned block number requested: sector_size=4096, block=387084760, blk_rq=31
> > [ 1175.280834] bcache: bch_count_io_errors() dm-6: IO error on reading from cache, recovering
> > [ 1175.282232] block drbd8065: read: error=-5 s=19391360s
> > [ 1175.283335] block drbd8065: Local IO failed in drbd_endio_read_sec_final.
> > 
> > 
> > Note that we run this without your original patch, so the original 
> > backtrace still stands.
> > 
> > Does this mean there is something in my cache that is less than 4k?
> 
> Hi Eric,
> 
> The last patch I posted was to check LBA alignment for requests to
> backing device. It seems all the checking places does not find
> non-4k-aligned LBA.
> 
> Let me compose an update version, to check LBA address 4k alignment when
> bio submitting to backing device. Then let's see what will happen.
> 

Hi Coly,

We did get traces over night, so hopefully these are useful. In summary, 
these are the ones that hit:

 check_4k_alignment() KEY_OFFSET(&w->key) is not 4KB aligned
 check_4k_alignment() KEY_OFFSET(l) + KEY_SIZE(r) is not 4KB aligned
 check_4k_alignment() KEY_START(k) is not 4KB aligned

The whole dmesg output that we have is here: https://pastebin.com/nuYFi66K

And some of the traces separated by error message are shown below. The
ones below have a unique backtrace, but they may not cover all unique
backtraces.

====================================================================

Of those that hit, These are the ones that were accompanied by SCSI errors:

[54947.892574] bcache: check_4k_alignment() KEY_OFFSET(&w->key) is not 4KB aligned: 15724561783
[54947.893173] CPU: 5 PID: 1166 Comm: bcache_writebac Tainted: G           O    4.1.49-5.el7.x86_64 #1
[54947.893757] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[54947.894323]  0000000000000286 8c136ca15cff4205 ffff8807ebea3d58 ffffffff816ff534
[54947.894907]  ffff88080a7b6aa0 ffff88080a7b0000 ffff8807ebea3d68 ffffffffa05beb63
[54947.895515]  ffff8807ebea3e08 ffffffffa05be174 00000003a93e4e90 ffff8807ef36c4c0
[54947.896132] Call Trace:
[54947.896705]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[54947.897285]  [<ffffffffa05beb63>] check_4k_alignment.part.9+0x24/0x26 [bcache]
[54947.897853]  [<ffffffffa05be174>] read_dirty+0x444/0x4a0 [bcache]
[54947.898418]  [<ffffffffa05be1d0>] ? read_dirty+0x4a0/0x4a0 [bcache]
[54947.898980]  [<ffffffffa05be5cc>] bch_writeback_thread+0x3fc/0x4e0 [bcache]
[54947.899544]  [<ffffffffa05be1d0>] ? read_dirty+0x4a0/0x4a0 [bcache]
[54947.900121]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[54947.900673]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[54947.901226]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[54947.901783]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[54947.902401] sd 0:0:0:2: [sdc] Unaligned block number requested: sector_size=4096, block=353041024, blk_rq=23
[54947.903054] bcache: bch_count_io_errors() dm-6: IO error on reading dirty data from cache, recovering
[54947.903874] sd 0:0:0:1: [sdb] Unaligned block number requested: sector_size=4096, block=15724561760, blk_rq=23


[54958.301274] bcache: check_4k_alignment() KEY_OFFSET(&w->key) is not 4KB aligned: 15725385535
[54958.301889] CPU: 2 PID: 1166 Comm: bcache_writebac Tainted: G           O    4.1.49-5.el7.x86_64 #1
[54958.302532] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[54958.303144]  0000000000000286 8c136ca15cff4205 ffff8807ebea3d58 ffffffff816ff534
[54958.303805]  ffff88080a7b7dc0 ffff88080a7b0000 ffff8807ebea3d68 ffffffffa05beb63
[54958.304423]  ffff8807ebea3e08 ffffffffa05be174 00000003a949ec10 ffff8807ef36c4c0
[54958.305080] Call Trace:
[54958.305728]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[54958.306371]  [<ffffffffa05beb63>] check_4k_alignment.part.9+0x24/0x26 [bcache]
[54958.307049]  [<ffffffffa05be174>] read_dirty+0x444/0x4a0 [bcache]
[54958.307694]  [<ffffffffa05be1d0>] ? read_dirty+0x4a0/0x4a0 [bcache]
[54958.308338]  [<ffffffffa05be5cc>] bch_writeback_thread+0x3fc/0x4e0 [bcache]
[54958.308986]  [<ffffffffa05be1d0>] ? read_dirty+0x4a0/0x4a0 [bcache]
[54958.309631]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[54958.310267]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[54958.310914]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[54958.311533]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[54958.312265] sd 0:0:0:2: [sdc] Unaligned block number requested: sector_size=4096, block=387084760, blk_rq=31
[54958.313064] bcache: bch_count_io_errors() dm-6: IO error on reading dirty data from cache, recovering
[54958.314154] sd 0:0:0:1: [sdb] Unaligned block number requested: sector_size=4096, block=15725385504, blk_rq=31


====================================================================

And these are the KEY_OFFSET(l) + KEY_SIZE(r) traces:

[46163.299824] bcache: check_4k_alignment() KEY_OFFSET(l) + KEY_SIZE(r) is not 4KB aligned: 21534287647
[46163.301001] CPU: 4 PID: 30627 Comm: kworker/4:2 Tainted: G           O    4.1.49-5.el7.x86_64 #1
[46163.301950] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[46163.303095] Workqueue: bcache bch_data_insert_keys [bcache]
[46163.304268]  0000000000000286 96a09b6db6638f2f ffff8803125e3768 ffffffff816ff534
[46163.305448]  ffff880336be80f8 80000000d4800000 ffff8803125e3778 ffffffffa05beb01
[46163.306342]  ffff8803125e37b8 ffffffffa05a8166 ffffffffa05a7f70 ffff8807f15a90d8
[46163.307165] Call Trace:
[46163.307969]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[46163.308778]  [<ffffffffa05beb01>] check_4k_alignment.part.3+0x24/0x26 [bcache]
[46163.309593]  [<ffffffffa05a8166>] bch_extent_merge+0x1f6/0x210 [bcache]
[46163.310419]  [<ffffffffa05a7f70>] ? bch_key_sort_cmp+0x50/0x50 [bcache]
[46163.311243]  [<ffffffffa05a7eb0>] ? bch_btree_ptr_bad+0x110/0x110 [bcache]
[46163.312040]  [<ffffffffa059db6f>] bch_bkey_try_merge+0xaf/0xd0 [bcache]
[46163.312833]  [<ffffffffa059defb>] btree_mergesort+0x36b/0x630 [bcache]
[46163.313617]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46163.314416]  [<ffffffffa059cd80>] ? bch_cache_allocator_start+0x50/0x50 [bcache]
[46163.315193]  [<ffffffffa05a7eb0>] ? bch_btree_ptr_bad+0x110/0x110 [bcache]
[46163.315969]  [<ffffffff811fbfa1>] ? alloc_pages_current+0x91/0x100
[46163.316730]  [<ffffffffa059e225>] __btree_sort+0x65/0x1c0 [bcache]
[46163.317483]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46163.318233]  [<ffffffffa059f7cf>] bch_btree_sort_partial+0xaf/0xe0 [bcache]
[46163.319010]  [<ffffffffa059f86a>] bch_btree_sort_lazy+0x6a/0x80 [bcache]
[46163.319751]  [<ffffffffa05a003e>] bch_btree_init_next+0x3e/0xd0 [bcache]
[46163.320490]  [<ffffffffa05a4e50>] bch_btree_insert_node+0x300/0x3d0 [bcache]
[46163.321211]  [<ffffffffa05a5ec8>] btree_insert_fn+0x28/0x50 [bcache]
[46163.321936]  [<ffffffffa05a3504>] bch_btree_map_nodes_recurse+0x54/0x190 [bcache]
[46163.322635]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.323325]  [<ffffffff817051a6>] ? down_write+0x16/0x50
[46163.324015]  [<ffffffffa05a3288>] ? bch_btree_node_get+0x78/0x2a0 [bcache]
[46163.324697]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46163.325373]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.326050]  [<ffffffffa05a32e5>] ? bch_btree_node_get+0xd5/0x2a0 [bcache]
[46163.326744]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46163.327408]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.328066]  [<ffffffffa05a67ac>] __bch_btree_map_nodes+0x11c/0x150 [bcache]
[46163.328717]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.329380]  [<ffffffffa05a68d4>] bch_btree_insert+0xf4/0x170 [bcache]
[46163.330020]  [<ffffffff810e7000>] ? prepare_to_wait_event+0xf0/0xf0
[46163.330651]  [<ffffffffa05ae55e>] bch_data_insert_keys+0x3e/0x160 [bcache]
[46163.331280]  [<ffffffff810bac60>] process_one_work+0x150/0x450
[46163.331897]  [<ffffffff810bb8c2>] worker_thread+0x112/0x530
[46163.332522]  [<ffffffff810bb7b0>] ? rescuer_thread+0x3e0/0x3e0
[46163.333119]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[46163.333706]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[46163.334291]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[46163.334864]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0


[46163.336149] bcache: check_4k_alignment() KEY_OFFSET(l) + KEY_SIZE(r) is not 4KB aligned: 21534287647
[46163.336984] CPU: 5 PID: 20295 Comm: kworker/5:1 Tainted: G           O    4.1.49-5.el7.x86_64 #1
[46163.337619] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[46163.338250] Workqueue: bcache bch_data_insert_keys [bcache]
[46163.338852]  0000000000000286 0444468897e19801 ffff88031827b7a8 ffffffff816ff534
[46163.339493]  ffff88034d428648 8000000008000000 ffff88031827b7b8 ffffffffa05beb01
[46163.340136]  ffff88031827b7f8 ffffffffa05a8166 ffff88031827b830 ffff8807f15af338
[46163.340745] Call Trace:
[46163.341336]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[46163.341936]  [<ffffffffa05beb01>] check_4k_alignment.part.3+0x24/0x26 [bcache]
[46163.342539]  [<ffffffffa05a8166>] bch_extent_merge+0x1f6/0x210 [bcache]
[46163.343140]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46163.343745]  [<ffffffffa059db6f>] bch_bkey_try_merge+0xaf/0xd0 [bcache]
[46163.344350]  [<ffffffffa059f605>] bch_btree_insert_key+0x205/0x320 [bcache]
[46163.344963]  [<ffffffffa05a08ee>] btree_insert_key+0x5e/0x120 [bcache]
[46163.345570]  [<ffffffffa05a1742>] bch_btree_insert_keys+0x62/0x250 [bcache]
[46163.346187]  [<ffffffffa05a4c8c>] bch_btree_insert_node+0x13c/0x3d0 [bcache]
[46163.346800]  [<ffffffffa05a5ec8>] btree_insert_fn+0x28/0x50 [bcache]
[46163.347394]  [<ffffffffa05a3504>] bch_btree_map_nodes_recurse+0x54/0x190 [bcache]
[46163.348004]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.348592]  [<ffffffff817051a6>] ? down_write+0x16/0x50
[46163.349197]  [<ffffffffa05a3288>] ? bch_btree_node_get+0x78/0x2a0 [bcache]
[46163.349787]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46163.350417]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.351036]  [<ffffffffa05a32e5>] ? bch_btree_node_get+0xd5/0x2a0 [bcache]
[46163.351658]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46163.352284]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.352900]  [<ffffffffa05a67ac>] __bch_btree_map_nodes+0x11c/0x150 [bcache]
[46163.353513]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.354149]  [<ffffffffa05a68d4>] bch_btree_insert+0xf4/0x170 [bcache]
[46163.354760]  [<ffffffff810e7000>] ? prepare_to_wait_event+0xf0/0xf0
[46163.355374]  [<ffffffffa05ae55e>] bch_data_insert_keys+0x3e/0x160 [bcache]
[46163.355983]  [<ffffffff810bac60>] process_one_work+0x150/0x450
[46163.356587]  [<ffffffff810bb8c2>] worker_thread+0x112/0x530
[46163.357217]  [<ffffffff810bb7b0>] ? rescuer_thread+0x3e0/0x3e0
[46163.357804]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[46163.358406]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[46163.359002]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[46163.359592]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0


[46324.196331] bcache: check_4k_alignment() KEY_OFFSET(l) + KEY_SIZE(r) is not 4KB aligned: 21536679711
[46324.196972] CPU: 6 PID: 15560 Comm: kworker/6:0 Tainted: G           O    4.1.49-5.el7.x86_64 #1
[46324.197598] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[46324.198244] Workqueue: bcache bch_data_insert_keys [bcache]
[46324.198883]  0000000000000286 4c4ffe2b3d8617d9 ffff8803102ff7a8 ffffffff816ff534
[46324.199572]  ffff880336beb9d8 8000000008000000 ffff8803102ff7b8 ffffffffa05beb01
[46324.200251]  ffff8803102ff7f8 ffffffffa05a8166 ffff88042fe19e50 ffff88042fe1c8c8
[46324.200890] Call Trace:
[46324.201510]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[46324.202132]  [<ffffffffa05beb01>] check_4k_alignment.part.3+0x24/0x26 [bcache]
[46324.202763]  [<ffffffffa05a8166>] bch_extent_merge+0x1f6/0x210 [bcache]
[46324.203385]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46324.204014]  [<ffffffffa059db6f>] bch_bkey_try_merge+0xaf/0xd0 [bcache]
[46324.204640]  [<ffffffffa059f605>] bch_btree_insert_key+0x205/0x320 [bcache]
[46324.205261]  [<ffffffff812a17ec>] ? kernfs_path_locked+0x3c/0x90
[46324.205882]  [<ffffffff8134e49c>] ? bfq_entity_service_tree+0xec/0x380
[46324.206503]  [<ffffffffa05a08ee>] btree_insert_key+0x5e/0x120 [bcache]
[46324.207140]  [<ffffffffa05a1742>] bch_btree_insert_keys+0x62/0x250 [bcache]
[46324.207759]  [<ffffffffa05a4c8c>] bch_btree_insert_node+0x13c/0x3d0 [bcache]
[46324.208374]  [<ffffffffa05a5ec8>] btree_insert_fn+0x28/0x50 [bcache]
[46324.208986]  [<ffffffffa05a3504>] bch_btree_map_nodes_recurse+0x54/0x190 [bcache]
[46324.209603]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46324.210219]  [<ffffffff817051a6>] ? down_write+0x16/0x50
[46324.210850]  [<ffffffffa05a3288>] ? bch_btree_node_get+0x78/0x2a0 [bcache]
[46324.211474]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46324.212098]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46324.212724]  [<ffffffffa05a32e5>] ? bch_btree_node_get+0xd5/0x2a0 [bcache]
[46324.213345]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46324.213969]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46324.214592]  [<ffffffffa05a67ac>] __bch_btree_map_nodes+0x11c/0x150 [bcache]
[46324.215213]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46324.215834]  [<ffffffffa05a68d4>] bch_btree_insert+0xf4/0x170 [bcache]
[46324.216458]  [<ffffffff810e7000>] ? prepare_to_wait_event+0xf0/0xf0
[46324.217078]  [<ffffffffa05ae55e>] bch_data_insert_keys+0x3e/0x160 [bcache]
[46324.217713]  [<ffffffff810bac60>] process_one_work+0x150/0x450
[46324.218326]  [<ffffffff810bb8c2>] worker_thread+0x112/0x530
[46324.218937]  [<ffffffff810bb7b0>] ? rescuer_thread+0x3e0/0x3e0
[46324.219544]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[46324.220144]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[46324.220758]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[46324.221357]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0


[46324.222571] bcache: check_4k_alignment() KEY_OFFSET(l) + KEY_SIZE(r) is not 4KB aligned: 21536679711
[46324.223436] CPU: 4 PID: 2135 Comm: kworker/4:17 Tainted: G           O    4.1.49-5.el7.x86_64 #1
[46324.224078] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[46324.224726] Workqueue: bcache bch_data_insert_keys [bcache]
[46324.225392]  0000000000000286 a9ae2ac7dacb6f9a ffff880318a2f768 ffffffff816ff534
[46324.226050]  ffff880336e21ac0 80000000aa800000 ffff880318a2f778 ffffffffa05beb01
[46324.226732]  ffff880318a2f7b8 ffffffffa05a8166 ffffffffa05a8180 ffff88042fe1cfc8
[46324.227383] Call Trace:
[46324.228011]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[46324.228642]  [<ffffffffa05beb01>] check_4k_alignment.part.3+0x24/0x26 [bcache]
[46324.229280]  [<ffffffffa05a8166>] bch_extent_merge+0x1f6/0x210 [bcache]
[46324.229892]  [<ffffffffa05a8180>] ? bch_extent_merge+0x210/0x210 [bcache]
[46324.230516]  [<ffffffffa05a7eb0>] ? bch_btree_ptr_bad+0x110/0x110 [bcache]
[46324.231148]  [<ffffffffa059db6f>] bch_bkey_try_merge+0xaf/0xd0 [bcache]
[46324.231756]  [<ffffffffa059defb>] btree_mergesort+0x36b/0x630 [bcache]
[46324.232399]  [<ffffffffa059cd80>] ? bch_cache_allocator_start+0x50/0x50 [bcache]
[46324.232998]  [<ffffffffa05a7eb0>] ? bch_btree_ptr_bad+0x110/0x110 [bcache]
[46324.233611]  [<ffffffff811fbfa1>] ? alloc_pages_current+0x91/0x100
[46324.234244]  [<ffffffffa059e225>] __btree_sort+0x65/0x1c0 [bcache]
[46324.234837]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46324.235454]  [<ffffffffa059f7cf>] bch_btree_sort_partial+0xaf/0xe0 [bcache]
[46324.236050]  [<ffffffffa059f86a>] bch_btree_sort_lazy+0x6a/0x80 [bcache]
[46324.236673]  [<ffffffffa05a003e>] bch_btree_init_next+0x3e/0xd0 [bcache]
[46324.237298]  [<ffffffffa05a4ee1>] bch_btree_insert_node+0x391/0x3d0 [bcache]
[46324.237909]  [<ffffffffa05a5ec8>] btree_insert_fn+0x28/0x50 [bcache]
[46324.238517]  [<ffffffffa05a3504>] bch_btree_map_nodes_recurse+0x54/0x190 [bcache]
[46324.239128]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46324.239719]  [<ffffffff817051a6>] ? down_write+0x16/0x50
[46324.240332]  [<ffffffffa05a3288>] ? bch_btree_node_get+0x78/0x2a0 [bcache]
[46324.240956]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46324.241581]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46324.242176]  [<ffffffffa05a32e5>] ? bch_btree_node_get+0xd5/0x2a0 [bcache]
[46324.242791]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46324.243409]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46324.244003]  [<ffffffffa05a67ac>] __bch_btree_map_nodes+0x11c/0x150 [bcache]
[46324.244613]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46324.245204]  [<ffffffffa05a68d4>] bch_btree_insert+0xf4/0x170 [bcache]
[46324.245813]  [<ffffffff810e7000>] ? prepare_to_wait_event+0xf0/0xf0
[46324.246429]  [<ffffffffa05ae55e>] bch_data_insert_keys+0x3e/0x160 [bcache]
[46324.247036]  [<ffffffff810bac60>] process_one_work+0x150/0x450
[46324.247640]  [<ffffffff810bb8c2>] worker_thread+0x112/0x530
[46324.248221]  [<ffffffff810bb7b0>] ? rescuer_thread+0x3e0/0x3e0
[46324.248821]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[46324.249417]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[46324.250020]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[46324.250631]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0


====================================================================

And these are the KEY_START(k) traces:


[46163.361922] bcache: check_4k_alignment() KEY_START(k) is not 4KB aligned: 21534287647
[46163.362539] CPU: 3 PID: 687 Comm: kworker/3:3 Tainted: G           O    4.1.49-5.el7.x86_64 #1
[46163.363156] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[46163.363785] Workqueue: bcache bch_data_insert_keys [bcache]
[46163.364418]  0000000000000286 470abf2ec6a15cb3 ffff880031eff728 ffffffff816ff534
[46163.365075]  ffff8807f15a9108 0000000000008001 ffff880031eff738 ffffffffa05beb01
[46163.365724]  ffff880031eff808 ffffffffa05a8ec3 ffff880350889770 0000000000000001
[46163.366375] Call Trace:
[46163.367005]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[46163.367644]  [<ffffffffa05beb01>] check_4k_alignment.part.3+0x24/0x26 [bcache]
[46163.368261]  [<ffffffffa05a8ec3>] bch_extent_insert_fixup+0x6e3/0x810 [bcache]
[46163.368884]  [<ffffffff812a17ec>] ? kernfs_path_locked+0x3c/0x90
[46163.369504]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46163.370115]  [<ffffffffa059f4c4>] bch_btree_insert_key+0xc4/0x320 [bcache]
[46163.370743]  [<ffffffff812a1888>] ? kernfs_path+0x48/0x60
[46163.371359]  [<ffffffffa05a08ee>] btree_insert_key+0x5e/0x120 [bcache]
[46163.371954]  [<ffffffffa05a1742>] bch_btree_insert_keys+0x62/0x250 [bcache]
[46163.372565]  [<ffffffff810d5378>] ? __enqueue_entity+0x78/0x80
[46163.373171]  [<ffffffff810dceeb>] ? put_prev_entity+0x5b/0x490
[46163.373788]  [<ffffffffa05a4c8c>] bch_btree_insert_node+0x13c/0x3d0 [bcache]
[46163.374418]  [<ffffffffa05a5ec8>] btree_insert_fn+0x28/0x50 [bcache]
[46163.375008]  [<ffffffffa05a3504>] bch_btree_map_nodes_recurse+0x54/0x190 [bcache]
[46163.375642]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.376247]  [<ffffffff817051a6>] ? down_write+0x16/0x50
[46163.376849]  [<ffffffffa05a3288>] ? bch_btree_node_get+0x78/0x2a0 [bcache]
[46163.377450]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46163.378055]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.378659]  [<ffffffffa05a32e5>] ? bch_btree_node_get+0xd5/0x2a0 [bcache]
[46163.379290]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46163.379924]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.380537]  [<ffffffffa05a67ac>] __bch_btree_map_nodes+0x11c/0x150 [bcache]
[46163.381147]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.381746]  [<ffffffffa05a68d4>] bch_btree_insert+0xf4/0x170 [bcache]
[46163.382342]  [<ffffffff810e7000>] ? prepare_to_wait_event+0xf0/0xf0
[46163.382940]  [<ffffffffa05ae55e>] bch_data_insert_keys+0x3e/0x160 [bcache]
[46163.383535]  [<ffffffff810bac60>] process_one_work+0x150/0x450
[46163.384129]  [<ffffffff810bb8c2>] worker_thread+0x112/0x530
[46163.384741]  [<ffffffff810bb7b0>] ? rescuer_thread+0x3e0/0x3e0
[46163.385311]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[46163.385915]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[46163.386502]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[46163.387102]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0


[46163.387732] bcache: check_4k_alignment() KEY_START(k) is not 4KB aligned: 21534287647
[46163.388501] CPU: 3 PID: 687 Comm: kworker/3:3 Tainted: G           O    4.1.49-5.el7.x86_64 #1
[46163.389191] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[46163.389970] Workqueue: bcache bch_data_insert_keys [bcache]
[46163.390788]  0000000000000286 470abf2ec6a15cb3 ffff880031eff718 ffffffff816ff534
[46163.391511]  ffff8807f15a9108 ffff880031eff790 ffff880031eff738 ffffffffa059f0ba
[46163.392147]  ffff8807f15a9108 ffff8807f15af368 ffff880031eff808 ffffffffa05a8e01
[46163.392773] Call Trace:
[46163.393360]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[46163.393982]  [<ffffffffa059f0ba>] __bch_cut_back+0x10a/0x130 [bcache]
[46163.394579]  [<ffffffffa05a8e01>] bch_extent_insert_fixup+0x621/0x810 [bcache]
[46163.395195]  [<ffffffff812a17ec>] ? kernfs_path_locked+0x3c/0x90
[46163.395810]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46163.396397]  [<ffffffffa059f4c4>] bch_btree_insert_key+0xc4/0x320 [bcache]
[46163.397009]  [<ffffffff812a1888>] ? kernfs_path+0x48/0x60
[46163.397619]  [<ffffffffa05a08ee>] btree_insert_key+0x5e/0x120 [bcache]
[46163.398233]  [<ffffffffa05a1742>] bch_btree_insert_keys+0x62/0x250 [bcache]
[46163.398922]  [<ffffffff810d5378>] ? __enqueue_entity+0x78/0x80
[46163.399513]  [<ffffffff810dceeb>] ? put_prev_entity+0x5b/0x490
[46163.400097]  [<ffffffffa05a4c8c>] bch_btree_insert_node+0x13c/0x3d0 [bcache]
[46163.400686]  [<ffffffffa05a5ec8>] btree_insert_fn+0x28/0x50 [bcache]
[46163.401273]  [<ffffffffa05a3504>] bch_btree_map_nodes_recurse+0x54/0x190 [bcache]
[46163.401865]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.402468]  [<ffffffff817051a6>] ? down_write+0x16/0x50
[46163.403093]  [<ffffffffa05a3288>] ? bch_btree_node_get+0x78/0x2a0 [bcache]
[46163.403692]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46163.404293]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.404923]  [<ffffffffa05a32e5>] ? bch_btree_node_get+0xd5/0x2a0 [bcache]
[46163.405551]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46163.406165]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.406761]  [<ffffffffa05a67ac>] __bch_btree_map_nodes+0x11c/0x150 [bcache]
[46163.407354]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46163.407948]  [<ffffffffa05a68d4>] bch_btree_insert+0xf4/0x170 [bcache]
[46163.408538]  [<ffffffff810e7000>] ? prepare_to_wait_event+0xf0/0xf0
[46163.409130]  [<ffffffffa05ae55e>] bch_data_insert_keys+0x3e/0x160 [bcache]
[46163.409724]  [<ffffffff810bac60>] process_one_work+0x150/0x450
[46163.410311]  [<ffffffff810bb8c2>] worker_thread+0x112/0x530
[46163.410953]  [<ffffffff810bb7b0>] ? rescuer_thread+0x3e0/0x3e0
[46163.411557]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[46163.412132]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[46163.412710]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[46163.413282]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0


[46334.214472] bcache: check_4k_alignment() KEY_START(k) is not 4KB aligned: 21536686191
[46334.215126] CPU: 4 PID: 2135 Comm: kworker/4:17 Tainted: G           O    4.1.49-5.el7.x86_64 #1
[46334.215756] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[46334.216412] Workqueue: bcache bch_data_insert_keys [bcache]
[46334.217090]  0000000000000286 a9ae2ac7dacb6f9a ffff880318a2f728 ffffffff816ff534
[46334.217791]  ffff88042fe1aad0 00000000000026b1 ffff880318a2f738 ffffffffa05beb01
[46334.218461]  ffff880318a2f808 ffffffffa05a8ec3 ffff880318a2f7a8 ffffffff810dd6e9
[46334.219142] Call Trace:
[46334.219768]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[46334.220392]  [<ffffffffa05beb01>] check_4k_alignment.part.3+0x24/0x26 [bcache]
[46334.221020]  [<ffffffffa05a8ec3>] bch_extent_insert_fixup+0x6e3/0x810 [bcache]
[46334.221636]  [<ffffffff810dd6e9>] ? enqueue_entity+0x389/0xb20
[46334.222256]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46334.222856]  [<ffffffffa059f4c4>] bch_btree_insert_key+0xc4/0x320 [bcache]
[46334.223456]  [<ffffffffa05a08ee>] btree_insert_key+0x5e/0x120 [bcache]
[46334.224075]  [<ffffffffa05a16bf>] ? bkey_put+0x6f/0x90 [bcache]
[46334.224706]  [<ffffffffa05a1742>] bch_btree_insert_keys+0x62/0x250 [bcache]
[46334.225301]  [<ffffffffa05a4c8c>] bch_btree_insert_node+0x13c/0x3d0 [bcache]
[46334.225893]  [<ffffffffa05a5ec8>] btree_insert_fn+0x28/0x50 [bcache]
[46334.226479]  [<ffffffffa05a3504>] bch_btree_map_nodes_recurse+0x54/0x190 [bcache]
[46334.227070]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.227661]  [<ffffffff817051a6>] ? down_write+0x16/0x50
[46334.228277]  [<ffffffffa05a3288>] ? bch_btree_node_get+0x78/0x2a0 [bcache]
[46334.228871]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46334.229468]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.230093]  [<ffffffffa05a32e5>] ? bch_btree_node_get+0xd5/0x2a0 [bcache]
[46334.230693]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46334.231294]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.231895]  [<ffffffffa05a67ac>] __bch_btree_map_nodes+0x11c/0x150 [bcache]
[46334.232522]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.233121]  [<ffffffffa05a68d4>] bch_btree_insert+0xf4/0x170 [bcache]
[46334.233714]  [<ffffffff810e7000>] ? prepare_to_wait_event+0xf0/0xf0
[46334.234308]  [<ffffffffa05ae55e>] bch_data_insert_keys+0x3e/0x160 [bcache]
[46334.234925]  [<ffffffff810bac60>] process_one_work+0x150/0x450
[46334.235523]  [<ffffffff810bb8c2>] worker_thread+0x112/0x530
[46334.236140]  [<ffffffff810bb7b0>] ? rescuer_thread+0x3e0/0x3e0
[46334.236723]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[46334.237302]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[46334.237892]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[46334.238468]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0


[46334.239762] bcache: check_4k_alignment() KEY_START(k) is not 4KB aligned: 21536686191
[46334.240405] CPU: 4 PID: 2135 Comm: kworker/4:17 Tainted: G           O    4.1.49-5.el7.x86_64 #1
[46334.241067] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[46334.241681] Workqueue: bcache bch_data_insert_keys [bcache]
[46334.242320]  0000000000000286 a9ae2ac7dacb6f9a ffff880318a2f718 ffffffff816ff534
[46334.242949]  ffff88042fe1aad0 ffff880318a2f790 ffff880318a2f738 ffffffffa059f0ba
[46334.243576]  ffff88042fe1aad0 ffff88042fe1db58 ffff880318a2f808 ffffffffa05a8e01
[46334.244266] Call Trace:
[46334.244872]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[46334.245485]  [<ffffffffa059f0ba>] __bch_cut_back+0x10a/0x130 [bcache]
[46334.246108]  [<ffffffffa05a8e01>] bch_extent_insert_fixup+0x621/0x810 [bcache]
[46334.246723]  [<ffffffff810dd6e9>] ? enqueue_entity+0x389/0xb20
[46334.247355]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46334.247979]  [<ffffffffa059f4c4>] bch_btree_insert_key+0xc4/0x320 [bcache]
[46334.248574]  [<ffffffffa05a08ee>] btree_insert_key+0x5e/0x120 [bcache]
[46334.249163]  [<ffffffffa05a16bf>] ? bkey_put+0x6f/0x90 [bcache]
[46334.249790]  [<ffffffffa05a1742>] bch_btree_insert_keys+0x62/0x250 [bcache]
[46334.250377]  [<ffffffffa05a4c8c>] bch_btree_insert_node+0x13c/0x3d0 [bcache]
[46334.250962]  [<ffffffffa05a5ec8>] btree_insert_fn+0x28/0x50 [bcache]
[46334.251599]  [<ffffffffa05a3504>] bch_btree_map_nodes_recurse+0x54/0x190 [bcache]
[46334.252203]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.252828]  [<ffffffff817051a6>] ? down_write+0x16/0x50
[46334.253443]  [<ffffffffa05a3288>] ? bch_btree_node_get+0x78/0x2a0 [bcache]
[46334.254051]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46334.254644]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.255242]  [<ffffffffa05a32e5>] ? bch_btree_node_get+0xd5/0x2a0 [bcache]
[46334.255853]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46334.256463]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.257061]  [<ffffffffa05a67ac>] __bch_btree_map_nodes+0x11c/0x150 [bcache]
[46334.257654]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.258248]  [<ffffffffa05a68d4>] bch_btree_insert+0xf4/0x170 [bcache]
[46334.258878]  [<ffffffff810e7000>] ? prepare_to_wait_event+0xf0/0xf0
[46334.259476]  [<ffffffffa05ae55e>] bch_data_insert_keys+0x3e/0x160 [bcache]
[46334.260117]  [<ffffffff810bac60>] process_one_work+0x150/0x450
[46334.260740]  [<ffffffff810bb8c2>] worker_thread+0x112/0x530
[46334.261355]  [<ffffffff810bb7b0>] ? rescuer_thread+0x3e0/0x3e0
[46334.261936]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[46334.262510]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[46334.263087]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[46334.263659]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0


[46334.265074] bcache: check_4k_alignment() KEY_START(k) is not 4KB aligned: 21536686191
[46334.265783] CPU: 4 PID: 2135 Comm: kworker/4:17 Tainted: G           O    4.1.49-5.el7.x86_64 #1
[46334.266406] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 2.10 01/09/2014
[46334.267035] Workqueue: bcache bch_data_insert_keys [bcache]
[46334.267665]  0000000000000286 a9ae2ac7dacb6f9a ffff880318a2f728 ffffffff816ff534
[46334.268330]  ffff88042fe1aad0 00000000000001b9 ffff880318a2f738 ffffffffa05beb01
[46334.269003]  ffff880318a2f808 ffffffffa05a8ec3 ffffffffa059e69b 0000000000000010
[46334.269647] Call Trace:
[46334.270274]  [<ffffffff816ff534>] dump_stack+0x63/0x81
[46334.270902]  [<ffffffffa05beb01>] check_4k_alignment.part.3+0x24/0x26 [bcache]
[46334.271536]  [<ffffffffa05a8ec3>] bch_extent_insert_fixup+0x6e3/0x810 [bcache]
[46334.272171]  [<ffffffffa059e69b>] ? __bch_bset_search+0x2eb/0x4c0 [bcache]
[46334.272796]  [<ffffffffa059f397>] ? __bch_btree_iter_init+0x77/0xc0 [bcache]
[46334.273426]  [<ffffffffa059f4c4>] bch_btree_insert_key+0xc4/0x320 [bcache]
[46334.274072]  [<ffffffffa05a08ee>] btree_insert_key+0x5e/0x120 [bcache]
[46334.274705]  [<ffffffffa05a1742>] bch_btree_insert_keys+0x62/0x250 [bcache]
[46334.275319]  [<ffffffff810de302>] ? enqueue_task_fair+0x482/0x7d0
[46334.275932]  [<ffffffff8101fd99>] ? sched_clock+0x9/0x10
[46334.276575]  [<ffffffff810d3a15>] ? sched_clock_cpu+0x85/0xc0
[46334.277220]  [<ffffffffa05a4c8c>] bch_btree_insert_node+0x13c/0x3d0 [bcache]
[46334.277855]  [<ffffffffa05a5ec8>] btree_insert_fn+0x28/0x50 [bcache]
[46334.278469]  [<ffffffffa05a3504>] bch_btree_map_nodes_recurse+0x54/0x190 [bcache]
[46334.279106]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.279718]  [<ffffffff817051a6>] ? down_write+0x16/0x50
[46334.280324]  [<ffffffffa05a3288>] ? bch_btree_node_get+0x78/0x2a0 [bcache]
[46334.280938]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46334.281554]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.282197]  [<ffffffffa05a32e5>] ? bch_btree_node_get+0xd5/0x2a0 [bcache]
[46334.282814]  [<ffffffffa05a35b5>] bch_btree_map_nodes_recurse+0x105/0x190 [bcache]
[46334.283428]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.284085]  [<ffffffffa05a67ac>] __bch_btree_map_nodes+0x11c/0x150 [bcache]
[46334.284709]  [<ffffffffa05a5ea0>] ? bch_btree_insert_check_key+0x1c0/0x1c0 [bcache]
[46334.285330]  [<ffffffffa05a68d4>] bch_btree_insert+0xf4/0x170 [bcache]
[46334.285956]  [<ffffffff810e7000>] ? prepare_to_wait_event+0xf0/0xf0
[46334.286566]  [<ffffffffa05ae55e>] bch_data_insert_keys+0x3e/0x160 [bcache]
[46334.287191]  [<ffffffff810bac60>] process_one_work+0x150/0x450
[46334.287797]  [<ffffffff810bb8c2>] worker_thread+0x112/0x530
[46334.288399]  [<ffffffff810bb7b0>] ? rescuer_thread+0x3e0/0x3e0
[46334.289028]  [<ffffffff810c10d8>] kthread+0xd8/0xf0
[46334.289634]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0
[46334.290294]  [<ffffffff817074d2>] ret_from_fork+0x42/0x70
[46334.290918]  [<ffffffff810c1000>] ? kthread_create_on_node+0x1b0/0x1b0


--
Eric Wheeler

> Thanks for the information !
> 
> Coly Li
> --
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