On Wed, Jan 12, 2022 at 05:02:13PM +0800, JeffleXu wrote: > I'm afraid IDR can't be replaced by xarray here. Because we need an 'ID' > for each pending read request, so that after fetching data from remote, > user daemon could notify kernel which read request has finished by this > 'ID'. > > Currently this 'ID' is get from idr_alloc(), and actually identifies the > position of corresponding read request inside the IDR tree. I can't find > similar API of xarray implementing similar function, i.e., returning an > 'ID'. xa_alloc().
