On 02/27/2015 03:24 AM, Qu Wenruo wrote:
Operation like qgroups assigning/deleting qgroup relations will mostly cause qgroup data inconsistent, since it needs to do the full rescan to determine whether shared extents are exclusive or still shared in parent qgroups. But there are some exceptions, like qgroup with only exclusive extents (qgroup->excl == qgroup->rfer), in that case, we only needs to modify all its parents' excl and rfer. So this patch adds a quick path for such qgroup in qgroup assign/remove routine, and if quick path failed, the qgroup status will be marked INCONSISTENT, and return 1 to info user-land. BTW since the quick path is much the same of qgroup_excl_accounting(), so move the core of it to __qgroup_excl_accounting() and reuse it.
Reviewed-by: Josef Bacik <jbacik@xxxxxx> Thanks, Josef -- 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
