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H A Dblk-wbt.hdiff d62118b6dd99b8f64350206a6ea6996083b28c9a Mon Nov 28 17:40:34 CET 2016 Jens Axboe <axboe@fb.com> blk-wbt: allow wbt to be enabled always through sysfs

Currently there's no way to enable wbt if it's not enabled in the
kernel config by default for a device. Allow a write to the
'wbt_lat_usec' queue sysfs file to enable wbt.

This is useful for both the kernel config case, but also if the
device is CFQ managed and it was turned off by default.

Signed-off-by: Jens Axboe <axboe@fb.com>
H A Dblk-wbt.cdiff d62118b6dd99b8f64350206a6ea6996083b28c9a Mon Nov 28 17:40:34 CET 2016 Jens Axboe <axboe@fb.com> blk-wbt: allow wbt to be enabled always through sysfs

Currently there's no way to enable wbt if it's not enabled in the
kernel config by default for a device. Allow a write to the
'wbt_lat_usec' queue sysfs file to enable wbt.

This is useful for both the kernel config case, but also if the
device is CFQ managed and it was turned off by default.

Signed-off-by: Jens Axboe <axboe@fb.com>
H A Dblk-sysfs.cdiff d62118b6dd99b8f64350206a6ea6996083b28c9a Mon Nov 28 17:40:34 CET 2016 Jens Axboe <axboe@fb.com> blk-wbt: allow wbt to be enabled always through sysfs

Currently there's no way to enable wbt if it's not enabled in the
kernel config by default for a device. Allow a write to the
'wbt_lat_usec' queue sysfs file to enable wbt.

This is useful for both the kernel config case, but also if the
device is CFQ managed and it was turned off by default.

Signed-off-by: Jens Axboe <axboe@fb.com>