On Tue, Jun 11 2019 at 9:10am -0400, Pankaj Gupta <pagu...@redhat.com> wrote:
> Hi Mike, > > Thanks for the review Please find my reply inline. > > > > > dm_table_supports_dax() is called multiple times (from > > dm_table_set_restrictions and dm_table_determine_type). It is strange > > to have a getter have a side-effect of being a setter too. Overloading > > like this could get you in trouble in the future. > > > > Are you certain this is what you want? > > I agree with you. > > > > > Or would it be better to refactor dm_table_supports_dax() to take an > > iterate_devices_fn arg and have callers pass the appropriate function? > > Then have dm_table_set_restrictions() caller do: > > > > if (dm_table_supports_dax(t, device_synchronous, NULL)) > > set_dax_synchronous(t->md->dax_dev); > > > > (NULL arg implies dm_table_supports_dax() refactoring would take a int > > *data pointer rather than int type). > > > > Mike > > > > I am sending below patch as per your suggestion. Does it look > near to what you have in mind? Yes, it does.. just one nit I noticed inlined below. > diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c > index 350cf0451456..8d89acc8b8c2 100644 > --- a/drivers/md/dm-table.c > +++ b/drivers/md/dm-table.c ... > @@ -1910,8 +1919,13 @@ void dm_table_set_restrictions(struct dm_table *t, > struct request_queue *q, > } > blk_queue_write_cache(q, wc, fua); > > - if (dm_table_supports_dax(t, PAGE_SIZE)) > + if (dm_table_supports_dax(t, device_supports_dax, &page_size)) { > + No need for an empty newline here ^ > blk_queue_flag_set(QUEUE_FLAG_DAX, q); > + if (dm_table_supports_dax(t, device_synchronous, NULL)) > + set_dax_synchronous(t->md->dax_dev); > + } > else > blk_queue_flag_clear(QUEUE_FLAG_DAX, q); > Thanks, Mike _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm