On Mon, Sep 13, 2021 at 8:43 PM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > On Mon, Sep 13, 2021 at 07:25:57PM +0800, Xie Yongji wrote: > > + invalidate_gendisk(nbd->disk); > > + if (nbd->config->bytesize) > > + kobject_uevent(&nbd_to_dev(nbd)->kobj, KOBJ_CHANGE); > > I wonder if the invalidate helper should just use > set_capacity_and_notify to take care of the notification in the proper > way. This adds an uevent to loop, and adds the RESIZE=1 argument to > nbd, but it feels like the right thing to do. Looks like set_capacity_and_notify() would not do notification if we set capacity to zero. How about calling kobject_uevent() directly in the helper? Thanks, Yongji
