Hi all: This is first reported to *libguestfs*: https://bugzilla.redhat.com/show_bug.cgi?id=624335 Then, I looked into upstream util-linux and it seems nothing wrong. I'm not convinced that it's a kernel bug. produce: --- # ./util-linux/disk-utils/blockdev --getbsz /dev/sda6 4096 # ./util-linux/disk-utils/blockdev --setbsz 2048 /dev/sda6 # ./util-linux/disk-utils/blockdev --getbsz /dev/sda6 4096 # ./util-linux/disk-utils/blockdev --setbsz 512 /dev/sda6 # ./util-linux/disk-utils/blockdev --getbsz /dev/sda6 4096 --- I'm not sure if it is related to write-back, but still CCed to Fengguang. Thanks, -Wanlong Gao -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
