On 2019/3/16 8:13, Damien Le Moal wrote: > f2fs_hw_support_discard() only tests if the super block device supports > discard. However, for a multi-device volume, not all disks used may > support discard. Improve the check performed to test all devices of > the volume and report discard as supported if at least one device of > the volume supports discard. To implement this, introduce the helper > function f2fs_bdev_support_discard(), which returns true for zoned block > devices (where discard is processed as a zone reset) and for regular > disks supporting the discard command. > > f2fs_bdev_support_discard() is also used in __queue_discard_cmd() to > handle discard command issuing for a particular device of the volume. > That is, prevent issuing a discard command for block devices that do > not support it. > > Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx> Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx> Thanks,
