On 8/28/14, 5:12 PM, Tomasz Chmielewski wrote: > I'd like to set noatime as a default mount option for a filesystem: > > # tune2fs -o noatime /dev/sdb1 > tune2fs 1.42.9 (4-Feb-2014) > Invalid mount option set: noatime Right, the manpage doesn't list that as supported under "-o". > Is there a reason why noatime can't be set as a default mount option? Thinking of all these USB connected devices where it would be handy. I haven't looked, but I'm guessing it's because noatime is a vfs-level switch, and by the time the ext4 superblock is getting read and processed during mount, that chance has passed. Just to keep things complicated and confusing ;) there's a different mechanism to do this as well: # tune2fs -E mount_opts=noatime /dev/sdc1 which succeeds; however, this fails to be parsed at mount time: [ 118.384020] EXT4-fs (sdc1): failed to parse options in superblock: noatime for the same reasons, I guess. The documentation could certainly be better... -Eric -- 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
