On Sun, 2007-03-04 at 09:43 -0600, Mike Christie wrote: > There are trying to do a scsi level multipath driver for RDAC support. > And they are trying to do something similar to request based multipath > (route requests instead of bios but in their case they are routing > scsi_cmnds instead of requests).
I guessed it might be something like that ... The SCSI driver layer wasn't designed to stack like that ... hence the problems of setup and teardown of the sg list. Wouldn't it just be easier to make request based multi-path work? Unfortunately, you can't avoid the request system because what you want to do is resubmit an I/O without having the mid-layer execute the prepare function (which is where it's mapped) so you need the REQ_DONTPREP flag. James James - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
