[ofw] RE: SRP Target Disconnect still hangs IPoIB

[Sufficool, Stanley]

BUG #1037 <https://bugs.openfabrics.org/show_bug.cgi?id=1037>  
 
https://bugs.openfabrics.org/show_bug.cgi?id=1037

	-----Original Message-----
	From: Smith, Stan [mailto:stan.smith at intel.com] 
	Sent: Friday, May 16, 2008 5:10 PM
	To: Sufficool, Stanley; Fab Tillier; ofw at lists.openfabrics.org
	Subject: RE: [ofw] RE: SRP Target Disconnect still hangs IPoIB
	
	
	What is the buzilla bug ID for this issue?

________________________________

	From: ofw-bounces at lists.openfabrics.org
[mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Sufficool,
Stanley
	Sent: Friday, May 16, 2008 4:57 PM
	To: Fab Tillier; ofw at lists.openfabrics.org
	Subject: [ofw] RE: SRP Target Disconnect still hangs IPoIB
	
	
	
	This is only occurring if the initiator has an active disk
connected to the target. 
	 
	The servers not connected to disks at the target do not have
this issue. I can load/unload connect/disconnect and the initiator
driver loads/unloads accordingly.
	 
	Not sure if this helps.
	 
	 
	 -----Original Message-----
	From: Fab Tillier [mailto:ftillier at windows.microsoft.com] 
	Sent: Friday, May 16, 2008 4:24 PM
	To: Sufficool, Stanley; ofw at lists.openfabrics.org
	Subject: RE: SRP Target Disconnect still hangs IPoIB
	
	

		Probably a deadlock stalling IBAL's PnP event callback
thread (there's only one system wide).  IPoIB depends on the PnP event
callback to do all its resource creation/destruction because it
generally gets called at DISPATCH_LEVEL and there's very little it can
do with the HCA driver.  The HCA driver's design requires blocking for
all verb operations despite the hardware processing commands
asynchronously and notifying of their completions form the DPC.

		 

		-Fab

		 

		From: ofw-bounces at lists.openfabrics.org
[mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Sufficool,
Stanley
		Sent: Friday, May 16, 2008 4:16 PM
		To: ofw at lists.openfabrics.org
		Subject: [ofw] SRP Target Disconnect still hangs IPoIB

		 

		Seems that RC4 has the same issue with SRP hanging other
IPoIB when the target quits without the initiator first performing a
clean "Eject" of the target device.

		 

		Reproduced by: 

		Start target (OFED Gen2 SRPT) 

		Start WinIB initiators

		Unload target driver (rmmod ib_srpt)

		WinIB initiators IPoIB complains "LAN Conn.. Network
Cable Is Unplugged"

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