On Monday 01 February 2016, Martin K. Petersen wrote: > >>>>> "Ruediger" == Ruediger Meier <sweet_f_a@xxxxxx> writes: > > Ruediger> I've noticed a possible problem with scsi_debug devices > where Ruediger> optimal_io_size < minimum_io_size. > > Ruediger> The problem seems reproducable with kernel 4.4.0 and also > with Ruediger> stable version 4.1.15. For stable tree the last known > working Ruediger> version is 4.1.13. > > http://git.kernel.org/cgit/linux/kernel/git/mkp/scsi.git/commit/?h=4. >5/scsi-fixes&id=d0eb20a863ba7dc1d3f4b841639671f134560be2 Ah thanks! But I'm still wondering a bit. Using kernel 4.5-rc2 (where 9c1d9c20 and d0eb20a8 is included) I get $ getconf PAGESIZE 4096 $ modprobe scsi_debug $ cat /sys/block/$devname/queue/{minimum_io_size,optimal_io_size} 512 524288 In past (kernel<=4.1) optimal_io_size io size was 32768. Is this really correct now? cu, Rudi -- 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
