[Scst-devel] [ofa-general] WinOF_2_0_5/SRP initiator: slow reads and eventually hangs

[Bart Van Assche]

On Wed, Sep 9, 2009 at 12:29 AM, Chris Worley <worleys at gmail.com> wrote:
> [ ... ]
> But, the same issue occurs... the apps on the initiator hang, and the
> target thinks all is well.   An app will hang in one of the file
> systems... the others seem to be working well (even though they are
> comprised of the same drives as the hung fs/app), for example: you can
> do a "find ." from their root w/o hanging "find", but if you try that
> in the fs where the app is hung, "find" will hang.  Lvscan/pvscan will
> hang too.
>
> Strangely, restarting the target (removing ib_srpd and scst_vdisk
> modules, then re-registering the disks with scst_vdisk and
> re-modprobing ib_srpt from scratch) causes the apps on the initiator
> to un-hang and make progress again... (but eventually hang again...
> seemingly more readily than before).
>
> While nothing other than the messages you'd expect (from
> re-registering the drives to the initiator logging in) occur on the
> target, the initiator has much to say during this re-registration
> period, starting w/ the time-out (that has been shown previously):
>
> Sep  8 22:04:07 nameme kernel: sd 30:0:0:3: timing out command, waited 360s
> Sep  8 22:04:07 nameme kernel: sd 30:0:0:3: SCSI error: return code = 0x06000000
> Sep  8 22:04:07 nameme kernel: end_request: I/O error, dev sdo, sector 45304704
> [ ... ]

Hello Chris,

Unless you will report the opposite I assume that the above issue (SRP
timeouts) has been solved by the solution I sent you via private
e-mail, namely to load the SRPT kernel module with the parameter
'thread' set to one (modprobe ib_srpt thread=1).

Bart.