Re: [PATCH] ext4: Protect group inode free counting with group lock.
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On Mon, May 28, 2012 at 11:57:59PM -0600, Andreas Dilger wrote: > > 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". You can also disable whether or not lazy inode table initialization happens by default via /etc/mke2fs.conf. At work we have a very fairly havily modified /etc/mke2fs.conf which has our production-specific mke2fs parameters defined, so that someone who runs mke2fs by hand will get the same result at as the automated systems. I can easily see how if you are trying for predictable latency numbers, disabling lazy inode table initialization makes a huge amount of sense. I'd recommend doing it via /etc/mke2fs.conf, though. Regards, - Ted -- 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
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