Hi list, I'm wondering why stacking raid1 above raid0 limits the block sizes in the blkio queue to 4 KiB both read and write. The max_sectors_kb is at 512. So it's not a matter of limits. Could someone explain, please? Or could someone pinpoint me to the related location in the source code? We've thought of using this for replication via InfiniBand/SRP. 4 KiB chunks are completely inefficient with SRP. We wanted to do this with DRBD first, but this is also extremely inefficient, because of chunk sizes in the blkio queue. I can reproduce the small 4 KiB chunks also in a file copy benchmark with raid 01 on ram disks. Cheers, Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
