$ sudo dd if=/dev/mmcblk0 of=/dev/null bs=1M status=progress
[sudo] password for ben:
62866325504 bytes (63 GB, 59 GiB) copied, 2703 s, 23.3 MB/s
59968+0 records in
59968+0 records out
62881005568 bytes (63 GB, 59 GiB) copied, 2703.74 s, 23.3 MB/s

-------------------------------------------------------------

[  612.330798] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[  612.331028]       Tainted: G         C      4.14.87-1-ARCH+ #4
[  612.331190] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  612.331403] kworker/2:2     D    0   311      2 0x00000000
[  612.331579] Workqueue: events_freezable mmc_rescan
[  612.331739] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[  612.331941] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[  612.332160] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[  612.332385] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[  612.332603] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[  612.332828] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[  612.333056] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[  612.333269] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)
[  735.211343] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[  735.211570]       Tainted: G         C      4.14.87-1-ARCH+ #4
[  735.211731] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  735.211941] kworker/2:2     D    0   311      2 0x00000000
[  735.212117] Workqueue: events_freezable mmc_rescan
[  735.212278] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[  735.212486] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[  735.212710] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[  735.212933] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[  735.213152] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[  735.213379] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[  735.213606] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[  735.213821] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)
[  858.091816] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[  858.092026]       Tainted: G         C      4.14.87-1-ARCH+ #4
[  858.092189] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  858.092402] kworker/2:2     D    0   311      2 0x00000000
[  858.092578] Workqueue: events_freezable mmc_rescan
[  858.092736] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[  858.092936] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[  858.093188] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[  858.093488] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[  858.093767] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[  858.094038] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[  858.094254] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[  858.094453] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)
[  980.972230] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[  980.972455]       Tainted: G         C      4.14.87-1-ARCH+ #4
[  980.972618] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  980.972830] kworker/2:2     D    0   311      2 0x00000000
[  980.973007] Workqueue: events_freezable mmc_rescan
[  980.973168] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[  980.973374] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[  980.973596] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[  980.973820] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[  980.974036] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[  980.974261] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[  980.974487] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[  980.974697] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)
[ 1103.852826] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[ 1103.853056]       Tainted: G         C      4.14.87-1-ARCH+ #4
[ 1103.853218] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1103.853433] kworker/2:2     D    0   311      2 0x00000000
[ 1103.866189] Workqueue: events_freezable mmc_rescan
[ 1103.878755] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[ 1103.889795] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[ 1103.898988] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[ 1103.908523] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[ 1103.917601] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[ 1103.926675] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[ 1103.936127] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[ 1103.945159] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)
[ 1226.733418] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[ 1226.745632]       Tainted: G         C      4.14.87-1-ARCH+ #4
[ 1226.757133] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1226.766429] kworker/2:2     D    0   311      2 0x00000000
[ 1226.775936] Workqueue: events_freezable mmc_rescan
[ 1226.785100] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[ 1226.794208] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[ 1226.803793] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[ 1226.812854] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[ 1226.822296] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[ 1226.831619] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[ 1226.840837] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[ 1226.850500] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)
[ 1349.613967] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[ 1349.626583]       Tainted: G         C      4.14.87-1-ARCH+ #4
[ 1349.635704] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1349.645208] kworker/2:2     D    0   311      2 0x00000000
[ 1349.654827] Workqueue: events_freezable mmc_rescan
[ 1349.664011] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[ 1349.673588] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[ 1349.682683] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[ 1349.692371] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[ 1349.701558] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[ 1349.710889] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[ 1349.720518] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[ 1349.729801] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)
[ 1472.494411] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[ 1472.507183]       Tainted: G         C      4.14.87-1-ARCH+ #4
[ 1472.519407] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1472.532272] kworker/2:2     D    0   311      2 0x00000000
[ 1472.544801] Workqueue: events_freezable mmc_rescan
[ 1472.557240] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[ 1472.569895] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[ 1472.582208] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[ 1472.595000] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[ 1472.607462] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[ 1472.620217] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[ 1472.632651] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[ 1472.645451] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)
[ 1595.374907] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[ 1595.387733]       Tainted: G         C      4.14.87-1-ARCH+ #4
[ 1595.400049] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1595.411634] kworker/2:2     D    0   311      2 0x00000000
[ 1595.421051] Workqueue: events_freezable mmc_rescan
[ 1595.430760] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[ 1595.440197] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[ 1595.449588] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[ 1595.459402] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[ 1595.468805] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[ 1595.478455] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[ 1595.488028] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[ 1595.497683] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)
[ 1718.255372] INFO: task kworker/2:2:311 blocked for more than 120 seconds.
[ 1718.268298]       Tainted: G         C      4.14.87-1-ARCH+ #4
[ 1718.281128] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1718.293960] kworker/2:2     D    0   311      2 0x00000000
[ 1718.306967] Workqueue: events_freezable mmc_rescan
[ 1718.319447] [<80a9a9b8>] (__schedule) from [<80a9b174>] (schedule+0x3c/0xa0)
[ 1718.332373] [<80a9b174>] (schedule) from [<80917f50>] (__mmc_claim_host+0x9c/0x1ec)
[ 1718.344851] [<80917f50>] (__mmc_claim_host) from [<809205d4>] (mmc_sd_detect+0x10/0x60)
[ 1718.357997] [<809205d4>] (mmc_sd_detect) from [<8091a8d4>] (mmc_rescan+0xd4/0x3dc)
[ 1718.370611] [<8091a8d4>] (mmc_rescan) from [<80148c48>] (process_one_work+0x210/0x4f8)
[ 1718.383525] [<80148c48>] (process_one_work) from [<80149b14>] (worker_thread+0x34/0x5d0)
[ 1718.396568] [<80149b14>] (worker_thread) from [<8014eba8>] (kthread+0x138/0x150)
[ 1718.409274] [<8014eba8>] (kthread) from [<80107cb8>] (ret_from_fork+0x14/0x3c)