On Thu, 2007-01-04 at 08:27 -0700, Matthew Wilcox wrote:
> Any returning command, or a returning command from this device? 

This device

>  We may
> be out of memory from a different device, and this may be the only
> command being sent to the scsi_debug driver.  Wouldn't we end up
> halting the device queue indefinitely then?

it's basically the SCSI_MLQUEUE_DEVICE_BUSY condition ... and yes, it
has a mechanism for no outstanding commands.

James


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