On 2020/10/31 16:23, Wu Bo wrote:
For some reason, during reboot the system, iscsi.service failed to
logout all sessions. kernel will hang forever on its
sd_sync_cache() logic, after issuing the SYNCHRONIZE_CACHE cmd to all
still existent paths.
[ 1044.098991] reboot: Mddev shutdown finished.
[ 1044.099311] reboot: Usermodehelper disable finished.
[ 1050.611244] connection2:0: ping timeout of 5 secs expired, recv timeout 5, last rx 4295152378, last ping 4295153633, now 4295154944
[ 1348.599676] Call trace:
[ 1348.599887] __switch_to+0xe8/0x150
[ 1348.600113] __schedule+0x33c/0xa08
[ 1348.600372] schedule+0x2c/0x88
[ 1348.600567] schedule_timeout+0x184/0x3a8
[ 1348.600820] io_schedule_timeout+0x28/0x48
[ 1348.601089] wait_for_common_io.constprop.2+0x168/0x258
[ 1348.601425] wait_for_completion_io_timeout+0x28/0x38
[ 1348.601762] blk_execute_rq+0x98/0xd8
[ 1348.602006] __scsi_execute+0xe0/0x1e8
[ 1348.602262] sd_sync_cache+0xd0/0x220 [sd_mod]
[ 1348.602551] sd_shutdown+0x6c/0xf8 [sd_mod]
[ 1348.602826] device_shutdown+0x13c/0x250
[ 1348.603078] kernel_restart_prepare+0x5c/0x68
[ 1348.603400] kernel_restart+0x20/0x98
[ 1348.603683] __se_sys_reboot+0x214/0x260
[ 1348.603987] __arm64_sys_reboot+0x24/0x30
[ 1348.604300] el0_svc_common+0x80/0x1b8
[ 1348.604590] el0_svc_handler+0x78/0xe0
[ 1348.604877] el0_svc+0x10/0x260
Hi,
Sorry, I did not add this commit:
commit 0ab710458da113a71c461c4df27e7f1353d9f864
Author: Bharath Ravi <rbharath@xxxxxxxxxx>
Date: Sat Jan 25 01:19:25 2020 -0500
scsi: iscsi: Perform connection failure entirely in kernel space
It makes the session recovery in the kernel do not need iscsid.
This commit was not added in my system, So the problem still exists.
After adding the patch, Tested and verified that the problem I
encountered has been resolved.
Please ignore this patch.
Thanks.
