> Subject: Re: [PATCH 05/12] net: mana: Set the DMA device max page size > > On Tue, May 17, 2022 at 02:04:29AM -0700, longli@xxxxxxxxxxxxxxxxx wrote: > > From: Long Li <longli@xxxxxxxxxxxxx> > > > > The system chooses default 64K page size if the device does not > > specify the max page size the device can handle for DMA. This do not > > work well when device is registering large chunk of memory in that a > > large page size is more efficient. > > > > Set it to the maximum hardware supported page size. > > For RDMA devices this should be set to the largest segment size an ib_sge can > take in when posting work. It should not be the page size of MR. 2M is a weird > number for that, are you sure it is right? Yes, this is the maximum page size used in hardware page tables. Long > > Jason
