On Tue, Apr 17, 2018 at 12:43 PM, Mike Christie <mchristi@xxxxxxxxxx> wrote: > On 04/17/2018 09:54 AM, Raghuram Devarakonda wrote: >> I am working on a plugin based on tcmu-runner and would appreciate >> some help. I took the sample file plugin (file_example.c) and modified >> it. In my testing, I noticed that reads/writes to the TCMU device hang >> and in all these cases, tcmu-runner daemon crashed. I understand that >> the crashes are most probably due to the code I added but I am >> wondering if there is any way to prevent the hang. For example, is >> there a timeout in lio that would eventually fails the reads and >> writes? > > Each tcmu device has a cmd_time_out attribute which is 30 seconds by > default. If we do not get a response within that time out the command > gets failed. > > When runner restarts and when using 4.16, it will fail all out standing > commands in case you have cmd_time_out disabled. Thanks for the info. As for 4.16, you are referring to Linux kernel version. Right? What happens pre-4.16? Thanks, Raghu -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
