On 04/11/2014 02:10 AM, Mike Christie wrote:
> On 04/03/2014 03:42 AM, myselfandfr...@gmail.com wrote:
>> Hi,
>>
>> In a scenario where we reboot a remote target and then run "iscsiadm -m
>> session --rescan" on the initiator,
>> iscsiadm starts taking around 85% CPU, and any other iscsiadm command we
>> send afterwards also gets stuck (probably waiting on a mutex), and the
>> "rescan" iscsiadm process can't be killed (niether with kill -9 or -11),
>> so it's probably stuck in the kernel.
>>
>> Is this a known/fixed issue?
>>
> 
> New. iscsiadm just writes to the scan/rescan sysfs files so yeah
> probably stuck in the kernel. I am not seeing this problem. When you run
> the rescan command is the target still down? Have we logged back in yet?
> 
> Could you run the following command when you hit the problem:
> 
> dmesg -c; echo w >/proc/sysrq-trigger; dmesg -c >waiting-tasks.txt.
> 
> It will dump the stack traces in /var/log/messages, so we can see where
> we are stuck in the iscsi/scsi scan code.
> 
> 
>> Logs: Just ask. We have plenty.
>>
>> open-iscsi version: 2.0.873 (from Debian)
>>
> 
> What kernel version is this?
> 

Could you also send the /var/log/messages?

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