Re: blk_queue_bounce_limit() broken for mask=0xffffffff on 64bit archs

>> There is a use cases when architecture is 64-bit but hardware supports >> only DMA to lower 4G of address space. E.g. NVMe device on RCar PCIe host. >> >> For such cases, it looks proper to call blk_queue_bounce_limit() with >> mask set to 0x - thus making block layer to use bounce

Re: blk_queue_bounce_limit() broken for mask=0xffffffff on 64bit archs

Hi, On Tue, Jan 10, 2017 at 4:48 AM, Nikita Yushchenko wrote: > Hi > > There is a use cases when architecture is 64-bit but hardware supports > only DMA to lower 4G of address space. E.g. NVMe device on RCar PCIe host. > > For such cases, it looks proper to call

blk_queue_bounce_limit() broken for mask=0xffffffff on 64bit archs

Hi There is a use cases when architecture is 64-bit but hardware supports only DMA to lower 4G of address space. E.g. NVMe device on RCar PCIe host. For such cases, it looks proper to call blk_queue_bounce_limit() with mask set to 0x - thus making block layer to use bounce buffers for