On Thu, Jan 10, 2019 at 03:15:35PM -0800, Tyrel Datwyler wrote:
> On a secondary note I was unaware of the GFP_ATOMIC limitations. Should this
> be
> added to the documentation somewhere? I don't see any mention here form
> DMA-API-HOWTO.txt.
The DMA documentation unfortauntely doesn't seem very
On Thu, Jan 10, 2019 at 12:11:53PM -0800, Tyrel Datwyler wrote:
> This allocation isn't a single use allocation. The driver is just lazy about
> allocating our ext_list area for large SG lists (ie. SG_ALL). When the driver
> was first written it only supported up to 10 indirect SRP buffers. James
On 01/10/2019 07:07 AM, Christoph Hellwig wrote:
> On Wed, Jan 09, 2019 at 06:58:56PM -0800, Tyrel Datwyler wrote:
>> While mapping DMA for scatter list when a scsi command is queued the
>> existing call to dma_alloc_coherent() in our map_sg_data() function
>> passes zero for the gfp_flags paramete
On 01/10/2019 07:07 AM, Christoph Hellwig wrote:
> On Wed, Jan 09, 2019 at 06:58:56PM -0800, Tyrel Datwyler wrote:
>> While mapping DMA for scatter list when a scsi command is queued the
>> existing call to dma_alloc_coherent() in our map_sg_data() function
>> passes zero for the gfp_flags paramete
On Wed, Jan 09, 2019 at 06:58:56PM -0800, Tyrel Datwyler wrote:
> While mapping DMA for scatter list when a scsi command is queued the
> existing call to dma_alloc_coherent() in our map_sg_data() function
> passes zero for the gfp_flags parameter. We are most definitly in atomic
> context at this p
On 01/09/2019 08:58 PM, Tyrel Datwyler wrote:
> While mapping DMA for scatter list when a scsi command is queued the
> existing call to dma_alloc_coherent() in our map_sg_data() function
> passes zero for the gfp_flags parameter. We are most definitly in atomic
> context at this point as queue_comm
While mapping DMA for scatter list when a scsi command is queued the
existing call to dma_alloc_coherent() in our map_sg_data() function
passes zero for the gfp_flags parameter. We are most definitly in atomic
context at this point as queue_command() is called in softirq context
and further we have
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