Re: [PATCH v4 4/6] blk-wbt: don't show valid wbt_lat_usec in sysfs while wbt is disabled

[Yu Kuai]

Hi,

在 2022/10/18 23:49, Christoph Hellwig 写道:
> >   static ssize_t queue_wb_lat_show(struct request_queue *q, char *page)
> >   {
> > +	u64 lat;
> > +
> >   	if (!wbt_rq_qos(q))
> >   		return -EINVAL;
> >   
> > -	return sprintf(page, "%llu\n", div_u64(wbt_get_min_lat(q), 1000));
> > +	lat = wbt_disabled(q) ? 0 : div_u64(wbt_get_min_lat(q), 1000);
> > +
> > +	return sprintf(page, "%llu\n", lat);
>
> 	if (wbt_disabled(q))
> 		return sprintf(page, "0\n");
> 	return sprintf(page, "%llu\n", div_u64(wbt_get_min_lat(q), 1000));
>
> but otherwise the patch looks fine:
>
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> .

Thanks for the review, I'll send a new version.

Kuai