Karen Xie wrote:
> 
> 
> -----Original Message-----
> From: Mike Christie [mailto:micha...@cs.wisc.edu] 
> Sent: Tuesday, April 07, 2009 9:00 AM
> To: open-iscsi@googlegroups.com
> Cc: Karen Xie
> Subject: Re: [PATCH 1/1 2.6.30] cxgb3i -- increase command queue depth
> 
> Mike Christie wrote:
>> k...@chelsio.com wrote:
>>> [PATCH 1/1 2.6.30] cxgb3i -- increase command queue depth
>>>
>>> From: Karen Xie <k...@chelsio.com>
>>>
>>> From: Karen Xie <k...@chelsio.com>
>>>
>>> Bump the command queue depth.
>>>
>>> Signed-off-by: Karen Xie <k...@chelsio.com>
>>> ---
>>> ---
>>>
>>>  drivers/scsi/cxgb3i/cxgb3i.h |    2 +-
>>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>>
>>>
>>> diff --git a/drivers/scsi/cxgb3i/cxgb3i.h
> b/drivers/scsi/cxgb3i/cxgb3i.h
>>> index d362860..68ed5db 100644
>>> --- a/drivers/scsi/cxgb3i/cxgb3i.h
>>> +++ b/drivers/scsi/cxgb3i/cxgb3i.h
>>> @@ -34,7 +34,7 @@
>>>  #include "cxgb3i_offload.h"
>>>  #include "cxgb3i_ddp.h"
>>>  
>>> -#define CXGB3I_SCSI_QDEPTH_DFLT    128
>>> +#define CXGB3I_SCSI_QDEPTH_DFLT    1024
>>>  #define CXGB3I_MAX_TARGET  CXGB3I_MAX_CONN
>>>  #define CXGB3I_MAX_LUN             512
>>>  #define ISCSI_PDU_NONPAYLOAD_MAX \
>>>
>> Is there a max number of iscsi pdus or scsi commands or skbs or max 
>> number of bytes that we can send to the card?
> 
> [Karen] There are per-connection limits but they are more related to the
> tcp layer (say send and receive windows).
> 
> Also is there a limit for each port/scsi_host?
> 
> [Karen] The hardware actually does not maintain any iscsi/scsi related
> state. For IOs, there is data memory map for directly DMAing data to the
> scsi data buffer (for read). But the memory map is not organized
> according to # of IOs but rather it is related to the total numbers of
> data buffers.
> 

This is the ddp map, right? And that is snic wide (it is not port wide)?

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