On Mon, 2011-03-21 at 17:22 -0500, Brian King wrote: > Tomo, > > Thanks for all the work you've done with this driver. It is much appreciated. > > What sort of performance are you seeing with this? With filebacked devices, I > was seeing around 1 MB/sec doing a basic disktest run. I haven't compared this > to ibmvstgt, but I'm pretty sure we did a fair bit better there. Perhaps I've got > some setup issue? > > I tried a ramdisk device and saw this on the server: > > > DMA_TO_DEVICE not supported for RAMDISK_DR with task_sg_chaining=1 > > So for the RAMDISK_DR (direct) SGL memory mapping case we do not support WRITEs for HW fabric modules using task_sg_changing=1. Please go ahead and use RAMDISK_MCP instead, and I will look at adding a special case in target_core_fabric_configfs.c code to disallow RAMDISK_DR symlink creation of configfs ports for target fabric modules using task_sg_chaining=1. Thanks! --nab -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
