On Tue, Aug 14, 2007 at 08:36:02PM +0200, Bastian Blank wrote: > There is only lvm between it. This looks like some sort of read-ahead > for the data, which should not happen for write requests. I tried to dig > a little bit in the block code but was not able to found the cause. I found something: scsi_host_get_command | int write = (data_dir == DMA_TO_DEVICE); According to ibmvstgt, this is a write to the scsi device, aka data transfer to this system. | rq = blk_get_request(shost->uspace_req_q, !write, gfp_mask); The second parameter should be READ or WRITE, not true/false and it seems to have the wrong direction. Bastian -- War is never imperative. -- McCoy, "Balance of Terror", stardate 1709.2 |