Re: Update on crash with kernel 3.19

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On 04/30/2015 01:47 AM, Nicholas A. Bellinger wrote:
> AFAICT from Robert + Alex's log this is the same type of scenario, and
> I'm pretty sure I was hitting the same login timeout handler back then,
> and was able to survive at least with iblock + scsi_debug backend.
> 
> Give that ceph and enhancedio backend are involved, it's not completely
> clear yet if this is a target specific issue or not..
> 
> Mike, what's the setup your able to reproduce with..?

For the LIO crash part I was using scsi_debug and iblock. I just do a dd
to the fc/iscsi device exported by LIO. Then on the LIO box I do

echo blocked  > /sys/block/sdXYZ/device/state

to the scsi scsi_debug device exported by iblock.

I then let the initiator side cmd timeout and the error handler to
eventually drop the session. On the LIO box when I see

"iSCSI Login timeout on Network Portal"

I allow the device to start executing IO again.

echo running  > /sys/block/sdXYZ/device/state
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