論理デバイスのリセット中に hpsa エラー処理スレッドでシステムがハングします。

Issue

• 論理デバイスのリセット中に hpsa エラー処理スレッドでシステムがハングします。

[32080.070066] hpsa 0000:08:00.0: scsi 0:1:0:0: resetting logical  Direct-Access     HP       LOGICAL VOLUME   RAID-1(+0) SSDSmartPathCap+ En+ Exp=1
[32283.684498] INFO: task scsi_eh_0:676 blocked for more than 120 seconds.
[32283.715109] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[32283.750553] scsi_eh_0       D ffff9a4afa068fd0     0   676      2 0x00000000
[32283.782879] Call Trace:
[32283.794465]  [] schedule+0x29/0x70
[32283.817377]  [] hpsa_eh_device_reset_handler+0x4b5/0x7a0 [hpsa]

crash> ps -m | grep UN | tail -n5
[1 11:14:59.538] [UN]  PID: 4162   TASK: ffff9a4c26a35ee0  CPU: 23  COMMAND: "python"
[1 11:15:07.220] [UN]  PID: 676    TASK: ffff9a4afa068fd0  CPU: 41  COMMAND: "scsi_eh_0"
[1 11:15:22.946] [UN]  PID: 1658   TASK: ffff9a4afb08eeb0  CPU: 7   COMMAND: "xfsaild/dm-5"
[1 11:15:38.260] [UN]  PID: 60884  TASK: ffff9a7fe9ab6eb0  CPU: 19  COMMAND: "java"
[1 11:15:38.292] [UN]  PID: 61106  TASK: ffff9a4722bc0000  CPU: 5   COMMAND: "java"

crash> bt ffff9a4afa068fd0
PID: 676    TASK: ffff9a4afa068fd0  CPU: 41  COMMAND: "scsi_eh_0"
#0 [ffff9a4af8ec3c08] __schedule at ffffffffbbd128d4
#1 [ffff9a4af8ec3c90] schedule at ffffffffbbd12f49
#2 [ffff9a4af8ec3ca0] hpsa_eh_device_reset_handler at ffffffffc01fcfc5 [hpsa]
#3 [ffff9a4af8ec3d90] scsi_try_bus_device_reset at ffffffffbba9ce6d
#4 [ffff9a4af8ec3da8] scsi_eh_ready_devs at ffffffffbba9f06f
#5 [ffff9a4af8ec3e30] scsi_error_handler at ffffffffbbaa0acc
#6 [ffff9a4af8ec3ec8] kthread at ffffffffbb6bae31