Re: [PATCH v3 2/2] dma-pool: Only allocate from CMA when in same memory zone

On Fri, 2020-08-14 at 08:06 +0200, Christoph Hellwig wrote: > On Sat, Aug 08, 2020 at 08:33:54AM +0200, Christoph Hellwig wrote: > > On Fri, Aug 07, 2020 at 10:50:19AM +0200, Nicolas Saenz Julienne wrote: > > > On Fri, 2020-08-07 at 07:21 +0200, Christoph Hellwig wrote: > > > > On Thu, Aug 06, 2020

Re: [PATCH v3 2/2] dma-pool: Only allocate from CMA when in same memory zone

On Sat, Aug 08, 2020 at 08:33:54AM +0200, Christoph Hellwig wrote: > On Fri, Aug 07, 2020 at 10:50:19AM +0200, Nicolas Saenz Julienne wrote: > > On Fri, 2020-08-07 at 07:21 +0200, Christoph Hellwig wrote: > > > On Thu, Aug 06, 2020 at 08:47:55PM +0200, Nicolas Saenz Julienne wrote: > > > > There is

Re: [PATCH v3 2/2] dma-pool: Only allocate from CMA when in same memory zone

On Fri, Aug 07, 2020 at 10:50:19AM +0200, Nicolas Saenz Julienne wrote: > On Fri, 2020-08-07 at 07:21 +0200, Christoph Hellwig wrote: > > On Thu, Aug 06, 2020 at 08:47:55PM +0200, Nicolas Saenz Julienne wrote: > > > There is no guarantee to CMA's placement, so allocating a zone specific > > > atomi

Re: [PATCH v3 2/2] dma-pool: Only allocate from CMA when in same memory zone

On Fri, 2020-08-07 at 07:21 +0200, Christoph Hellwig wrote: > On Thu, Aug 06, 2020 at 08:47:55PM +0200, Nicolas Saenz Julienne wrote: > > There is no guarantee to CMA's placement, so allocating a zone specific > > atomic pool from CMA might return memory from a completely different > > memory zone.

Re: [PATCH v3 2/2] dma-pool: Only allocate from CMA when in same memory zone

On Thu, Aug 06, 2020 at 08:47:55PM +0200, Nicolas Saenz Julienne wrote: > There is no guarantee to CMA's placement, so allocating a zone specific > atomic pool from CMA might return memory from a completely different > memory zone. To get around this double check CMA's placement before > allocating

Re: [PATCH v3 2/2] dma-pool: Only allocate from CMA when in same memory zone

Hi Nicolas, I love your patch! Perhaps something to improve: [auto build test WARNING on iommu/next] [also build test WARNING on linus/master v5.8] [cannot apply to next-20200806] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use

[PATCH v3 2/2] dma-pool: Only allocate from CMA when in same memory zone

There is no guarantee to CMA's placement, so allocating a zone specific atomic pool from CMA might return memory from a completely different memory zone. To get around this double check CMA's placement before allocating from it. Signed-off-by: Nicolas Saenz Julienne [hch: rebased, added a fallbac