These two patches give a degree of control over balance operations. The first makes it possible to get an idea of how much work remains to do, by tracking the number of block groups (chunks) that need to be moved/rewritten. The second patch allows a running balance operation to be cancelled when the current block group has been moved. One fundamental question, though -- is the progress monitor function best implemented as an ioctl, as I've done here, or should it be two or three sysfs files? I'm thinking of /proc/mdstat... Obviously, /proc/mdstat would never get into /sys, but exposing the "expected" and "remaining" values as files has an attractive simplicity to it. The user-space side of things are in a separate patch series, to follow. Please be gentle with me, this is my first (serious, non-trivial) kernel patch. :) Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- "No! My collection of rare, incurable diseases! Violated!" --- -- 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
