On 9/24/17 17:19, Christoph Hellwig wrote: > On Sun, Sep 24, 2017 at 04:02:42PM +0900, Damien Le Moal wrote: >> Zone write locking is mandatory for host managed zoned block devices so >> that sequential write order can be maintained. This is however optional >> for host aware devices as the device firmware can handle random writes. >> >> The default initialization always enable zones write locking for any >> zoned block device. Introduce the zones_wlock sysfs attribute to allow >> users to change this default setting for host aware disks. Changes to >> zones write locking state are not allowed for host managed disks (zones >> write locking is always enabled) and for regular disks (zones write >> locking is always disabled). > > Is it really worth the effort? Until someone who really ares about > HA drives and shows a benefit for a workload that matters I'd just > leave to code off for HA. OK. Will do. That can be changed back later again easily enough. Thanks. -- Damien Le Moal Western Digital Research
