On 2012-05-28, at 8:18 PM, Tao Ma wrote: > On 05/29/2012 06:22 AM, Ted Ts'o wrote: >> On Thu, May 17, 2012 at 10:17:34AM +0800, Tao Ma wrote: >>> oh, I see. Yes, we mkfs the system with the following configurations: >>> mke2fs -O ^resize_inode,^uninit_bg,extent,meta_bg,flex_bg,ext_attr >>> Maybe that's the reason why it has never be met by others before. ;) >> >> I'm curious -- is there a specific reason you're disabling the group >> descriptor checksum? Or was that just something that was picked at >> one point and you haven't changed it since? > > We are just disabling the uninit_bg so as to let the block group > initialization happen in the mkfs time. I don't know why the checksum is > also disabled by ^uninit_bg. The checksum is controlled by uninit_bg, because there was a need to ensure the bg_itable_unused count and the UNINIT flags could be trusted when doing an e2fsck. If you don't want to do lazy inode table initialization, that is disabled by "mke2fs -E lazy_itable_init=0". Cheers, Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
