New: open-iscsi Ping timeout erro

https://bugzilla.kernel.org/show_bug.cgi?id=118071

            Bug ID: 118071
           Summary: open-iscsi Ping timeout erro
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 4.4.7
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: SCSI
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Hi everyone:
I create a target using fileio as the backend storage on ARM64 server. The initiator reported some errors showed bellow while perform iozone test.

[178444.145679]  connection14:0: ping timeout of 5 secs expired, recv timeout
5, last rx 4339462894, last ping 4339464146, now 4339465400
[178444.145706]  connection14:0: detected conn error (1011)
[178469.674313]  connection14:0: detected conn error (1020)
[178504.420979]  connection14:0: ping timeout of 5 secs expired, recv timeout
5, last rx 4339477953, last ping 4339479204, now 4339480456
[178504.421001]  connection14:0: detected conn error (1011)
[178532.064262]  connection14:0: detected conn error (1020)
[178564.584087]  connection14:0: ping timeout of 5 secs expired, recv timeout

5, last rx 4339492980, last ping 4339494232, now 4339495484
..............................

I try to trace the function call of target iscsi. Then, I found the receiving thread of target iscsi blocked at fd_execute_sync_cache -> vfs_fsync_range. Further, vfs_fsync_range may takes more than 10 seconds to return,while
initiator Ping timeout would happened after 5 seconds. vfs_fsync_range was
call with the form vfs_fsync_range(fd_dev->fd_file, 0, LLONG_MAX, 1) every times which means sync all device cache.
So, is this a bug?
How does Initiator send sync_cache scsi command?
Does it need to sync all device cache at once?
Any reply would be thankful.

You are receiving this mail because:
You are the assignee for the bug.