Hello
I found the scsi-debug module removing [1] takes more than 3mins
during blktests srp/ tests, and bisecting shows it was introduced from
[2],
Pls help check it, let me know if you need more info for it, thanks.
[1]
# time ./check srp/001
srp/001 (Create and remove LUNs) [passed]
runtime ... 3.194s
real 3m12.119s
user 0m0.859s
sys 0m2.227s
# ps aux | grep modprobe
root 250153 0.0 0.0 10600 2264 pts/0 D+ 01:34 0:00
modprobe -r scsi_debug
# cat /proc/250153/stack
[<0>] blk_execute_rq+0x95/0xb0
[<0>] __scsi_execute+0xe2/0x250
[<0>] sd_sync_cache+0xac/0x190
[<0>] sd_shutdown+0x67/0xf0
[<0>] sd_remove+0x39/0x80
[<0>] __device_release_driver+0x234/0x240
[<0>] device_release_driver+0x23/0x30
[<0>] bus_remove_device+0xd8/0x140
[<0>] device_del+0x18b/0x3f0
[<0>] __scsi_remove_device+0x102/0x140
[<0>] scsi_forget_host+0x55/0x60
[<0>] scsi_remove_host+0x72/0x110
[<0>] sdebug_driver_remove+0x22/0xa0 [scsi_debug]
[<0>] __device_release_driver+0x181/0x240
[<0>] device_release_driver+0x23/0x30
[<0>] bus_remove_device+0xd8/0x140
[<0>] device_del+0x18b/0x3f0
[<0>] device_unregister+0x13/0x60
[<0>] sdebug_do_remove_host+0xd1/0xf0 [scsi_debug]
[<0>] scsi_debug_exit+0x58/0xe1e [scsi_debug]
[<0>] __do_sys_delete_module.constprop.0+0x170/0x260
[<0>] do_syscall_64+0x3a/0x80
[<0>] entry_SYSCALL_64_after_hwframe+0x44/0xae
# dmesg | tail -10
[ 345.863755] ib_srpt:srpt_release_channel_work: ib_srpt 10.16.221.74-32
[ 345.863855] ib_srpt:srpt_release_channel_work: ib_srpt 10.16.221.74-34
[ 345.863953] ib_srpt:srpt_release_channel_work: ib_srpt 10.16.221.74-36
[ 346.373371] sd 15:0:0:0: [sdb] Synchronizing SCSI cache
[ 532.864536] sd 15:0:0:0: [sdb] Synchronize Cache(10) failed:
Result: hostbyte=DID_TIME_OUT driverbyte=DRIVER_OK
------> seems most of the time were taken here
[ 532.929626] eno1np0 speed is unknown, defaulting to 1000
[ 532.938524] eno2np1 speed is unknown, defaulting to 1000
[ 532.943957] eno4 speed is unknown, defaulting to 1000
[ 532.998059] rdma_rxe: rxe-ah pool destroyed with unfree'd elem
[ 533.011781] rdma_rxe: unloaded
[2]
commit 2aad3cd8537033cd34f70294a23f54623ffe9c1b (refs/bisect/bad)
Author: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
Date: Sat Jan 8 20:28:45 2022 -0500
scsi: scsi_debug: Address races following module load
