On Wed, Sep 29, 2010 at 09:25, Ric Wheeler <rwheeler@xxxxxxxxxx> wrote: > Second question is why is checking in /sys a big deal, would Âyou prefer an > interface like we did for alignment in libblkid? It's about knowing what's behind the 'nodev' major == 0 of a btrfs mount. There is no way to get that from /sys or anywhere else at the moment. Usually filesystems backed by a disk have the dev_t of the device, or the fake block devices like md/dm/raid have their own major and the slaves/ directory pointing to the devices. This is not only about readahead, it's every other tool, that needs to know what kind of disks are behind a btrfs 'nodev' major == 0 mount. Kay -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
